Automatic Transmission - 6l80e Cadillac XLR I

Fastener Tightening Specifications

Fastener Tightening Specifications

Transmission General Specifications

Transmission General Specifications

Fluid Capacity Specifications

Fluid Capacity Specifications

Range Reference

Range Reference Table

Shift Solenoid Valve State and Gear Ratio

Shift Solenoid Valve State and Gear Ratio

Shift Speed

Shift Speed

Shift Speed

Transmission Internal Mode Switch Logic

Transmission Internal Mode Switch Logic

Automatic Transmission Schematic Icons

Automatic Transmission Schematic Icons Icon Icon Definition NOTE: The OBD II symbol is used on the circuit diagrams in order to alert the technician that the circuit is essential for proper OBD II emission control circuit operation. Any circuit which fails and causes the malfunction indicator lamp (MIL) to turn ON, or causes emissions-related component damage, is identified as an OBD II circuit

Scheme 55

Scheme 56

Scheme 57

Scheme 58

Scheme 59

Scheme 60

Scheme 61

Scheme 62

Scheme 63

Scheme 64

Scheme 65

Scheme 66

Scheme 67

Scheme 68

Scheme 69

Scheme 70

Scheme 71

Scheme 72

Scheme 73

Scheme 74

Scheme 75

Automatic Transmission Inline 16-Way Connector End View

16-Way Transmission Pass-Through

Scheme 76

Automatic Transmission Internal Connector End Views

Input and Output Speed Sensor (ISS/OSS)

Scheme 77

Automatic Transmission Internal Connector End Views

Internal Mode Switch (IMS)

Scheme 78

Automatic Transmission Related Connector End Views

TU/TD Assembly Harness J1

Scheme 79

Automatic Transmission Related Connector End Views

TU/TD Assembly Harness J4

Scheme 80

Automatic Transmission Related Connector End Views

TU/TD Assembly Harness J5

Diagnostic Code Index

DIAGNOSTIC CODE INDEX

Diagnostic Starting Point - Automatic Transmission

Begin the system diagnosis with the Diagnostic System Check - Vehicle . The Diagnostic System Check - Vehicle will provide the following information

1. The identification of the control module or modules which command the system.
2. The ability of the control module or modules to communicate through the serial data circuit.
3. The identification of any stored diagnostic trouble codes (DTCs) and the status of the codes.

The use of the Diagnostic System Check - Vehicle will identify the correct procedure for diagnosing the system and where the procedure is located.

Scan Tool Output Controls

Scan Tool Output Controls

Scan Tool Data List

Use the Scan Tool Data List under the following conditions

1. The Diagnostic System Check - Vehicle is complete.
2. The on-board diagnostics are functioning properly.
3. No diagnostic trouble codes (DTCs) are present.

The values below represent a typical display recorded from a properly functioning system.

Only the parameters listed below are used in this manual for diagnosing. If a scan tool displays other parameters, the values are not recommended by General Motors for use in diagnosis.

Scan tool values below were recorded under the following conditions

1. Engine at idle
2. Upper radiator hose hot
3. Closed throttle
4. Transmission in PARK
5. Closed Loop Operation
6. Accessories OFF
7. Brake pedal not applied

Scan Tool Data List

Action Taken When the DTC Sets - Type A

The control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.

Action Taken When the DTC Sets - Type B

The control module illuminates the MIL on the second consecutive ignition cycle that the diagnostic runs and fails.

Conditions for Clearing the MIL/DTC - Type A or Type B

1. The control module turns OFF the MIL after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
2. A current DTC Last Test Failed clears when the diagnostic runs and passes.
3. Use a scan tool in order to clear the MIL and the DTC.

Non-Emissions Related DTCs

Action Taken When the DTC Sets - Type C

1. The control module stores the DTC information into memory when the diagnostic runs and fails.
2. The MIL will not illuminate.
3. The driver information center, if equipped, may display a message.

Conditions for Clearing the DTC - Type C

1. A last test failed, or current DTC, clears when the diagnostic runs and passes.
2. Use a scan tool in order to clear the DTC.

Conditions for Clearing the DTC - Type X

This DTC is available in the PCM software, but has been disabled, or turned OFF. In this case, the diagnostic does not run, no DTCs are stored, and the MIL does not illuminate. Type X DTCs are used primarily for export vehicles that do not require MIL illumination or DTC storing.

Diagnostic Trouble Code (DTC) List/Type

Diagnostic Trouble Code (DTC) List/Type

Diagnostic Instructions

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit/System Description

The primary source of heat in the transmission is the torque converter. Hot oil exits the torque converter through the torque converter clutch (TCC) control valve and flows to the transmission cooler supply line. The supply line connects to the cooler, which is in the radiator. From the cooler, the oil returns through the oil cooler return line and enters the lubrication circuits. After lubricating the internal components, the oil returns to the oil pan. The transmission fluid temperature (TFT) sensor is located in the control solenoid (w/body and TCM) valve assembly.

Conditions for Running the DTC

The TFT is -39 to +149°C (-38 to +300°F) for 5 seconds.

Conditions for Setting the DTC

The TFT is greater than 140°C (284°F) for 1 minute.

Action Taken When the DTC Sets

1. DTC P0218 is a Type C DTC.
2. The TCM freezes transmission adaptive functions.

Conditions for Clearing the DTC

DTC P0218 is a Type C DTC.

Diagnostic Aids

The driver information center (DIC), if equipped, will display 'TRANSMISSION HOT- Idle Engine' when the TFT reaches 132°C (270°F). The TFT on the scan tool should rise steadily to a normal operating temperature, and then stabilize. Ask about the customer's driving habits, trailer towing, etc. Trailer towing should occur in D4. Ensure the engine cooling system is functioning normally.

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

Circuit/System Verification

1. Review the Failure Records when the DTC set. If the engine coolant temperature (ECT) was above 125°C (257°F) when the DTC set, go to «Engine Overheating»(/cadillac/xlr/i-2003-2009/remont/cooling-system-mechanical/#engine-cooling-system__engine-overheating) and correct that concern first.
2. Perform the «Transmission Fluid Check»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__transmission-fluid-check) to verify correct fluid level and condition.

Circuit/System Testing

1. Inspect the transmission cooling system for restrictions or damage.
2. Perform the «Transmission Fluid Cooler Flushing and Flow Test (J 45096)»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__transmission-fluid-cooler-flushing-and-flow) to verify proper transmission oil cooler flow. If a concern is found, repair or replace the damaged components as necessary.
3. Perform the «Line Pressure Check»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) to verify proper transmission line pressure. If a concern is found repair or replace the damaged components as necessary.

Repair Procedures

1. Repair or replace the automatic transmission cooler or lines as necessary.
2. Perform the «Service Fast Learn Adapts»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__service-fast-learn-adapts) .

Repair Verification

1. With a scan tool, clear the DTCs.
2. Operate the vehicle long enough to ensure the engine has reached normal operating temperature and the TFT has stabilized between 80-98°C (176-208°F).
3. Observe the specific DTC, and ensure DTC P0218 has run and passed.
4. Check for any other DTCs that you have not diagnosed.

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The transmission control module (TCM) continuously monitors the system voltage on the Ignition 1 voltage circuits. Lower than normal voltage may be inadequate to operate the transmission control solenoids properly. Improper solenoid operation may cause erratic transmission operation, which may result in internal damage.

P0562

1. Ignition voltage has been greater than 12 volts for 1 second this ignition cycle.
2. Engine speed is 1200 RPM or greater.

P0563

Ignition voltage has been greater than 12 volts for 1 second this ignition cycle.

P0562

The TCM detects system voltage is 11 volts or less for 10 seconds.

The TCM detects system voltage is 18 volts or greater for 10 seconds.

DTCs P0562 and P0563 are Type C DTCs.

DTCs P0562 and P0563 are Type C DTCs.

1. Observe the driver information center (DIC) messaging that would indicate the electrical system requires service.
2. Inspect for the following conditions: Loose or damaged terminals at the generator Loose or worn generator drive belt

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

Scan Tool Reference

1. «Scan Tool Output Controls»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__scan-tool-output-controls)
2. «Scan Tool Data List»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__scan-tool-data-list)
3. «Scan Tool Data Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

Engine ON, measure and record the battery voltage with a DMM. The battery voltage should be between 12.5-14.5 volts.

1. If the voltage is not within the specified value, or the charge indicator light is ON, go to «Charging System Test»(/cadillac/xlr/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system__charging-system-test) .

Engine ON, the scan tool Ignition voltage parameter should display between 12.5-14.5 volts.

1. If the voltage is not within the specified value, test the ignition voltage circuit for an open circuit or short to ground.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Perform the Service Fast Learn Adapts .

Diagnostic Fault Information

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

This is an internal fault detection of the control solenoid (w/body and TCM) valve assembly. This fault is handled inside the control solenoid (w/body and TCM) valve assembly and no external circuits are involved.

1. The control solenoid (w/body and TCM) valve assembly runs the program to detect an internal fault when the key is ON or the engine is running.
2. Ignition voltage is 8-18 volts.

The control solenoid (w/body and TCM) valve assembly has detected an internal malfunction.

1. DTCs P0601, P0602, P0603, P0604, and P1621 are Type A DTCs.
2. The TCM shifts to a default gear, shuts down, and turns OFF.

DTCs P0601, P0602, P0603, P0604, and P1621 are Type A DTCs.

When attempting to set TCM internal DTCs let the engine run for at least 1 minute and then shut the engine off for 30 seconds. Following this procedure will allow for a complete TCM shutdown. Reprogram the TCM and retest the DTC to see if the DTC resets.

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

1. Start the engine.
2. Let the engine run for 1 minute, then shut the engine OFF for 30 seconds.
3. Retest for DTCs P0601, P0602, P0603, P0604, and P1621.

Reprogram the TCM and recheck for DTCs.

1. If the DTC resets, replace the control solenoid (w/body and TCM) valve assembly.

Component Testing

Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection .

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Perform the Service Fast Learn Adapts .

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The control solenoid (w/body and TCM) valve assembly has a built-in TCM temperature sensor to detect possible overtemperature conditions of the TCM. This fault indicates the TCM is in an overtemperature condition and the TCM has shut down to protect from possible heat damage to the TCM. The TCM will remain off until the over temperature condition no longer exists.

1. The engine is running.
2. The TCM temperature is greater than -40°C (-40°F) and less than 160°C (320°F) for greater than 5 seconds.
3. DTC P0634 is not set.

1. The TCM has detected an internal overtemperature condition greater than 142°C (288°F) for 10 seconds.
2. Ignition voltage is equal to or greater than 18 volts and the TCM temperature is greater than 50°C (122°F).

1. DTC P0634 is a Type A DTC.
2. The TCM shifts to a default gear, shuts down, and turns OFF.

DTC P0634 is a Type A DTC.

Inspect the transmission cooler, transmission fluid lines, engine cooling system, and transmission fluid level, and inspect for any obstructions in the cooling system airflow which may cause an overheat condition. Inquire about customer towing or extreme driving conditions. An engine cooling system or transmission cooling system malfunction may cause this diagnostic to set. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection before replacing the control solenoid (w/body and TCM) valve assembly.

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

Start the engine and check for DTC P0634.

1. Start the engine.
2. Observe the transmission fluid temperature (TFT) and the engine coolant temperature (ECT). Ensure there are no current overheat conditions present in these systems. If an overheating concern is found, diagnose and repair that system first.
3. Operate the vehicle under the same conditions as found in Failure Records and observe the TCM Temperature parameter on the scan tool.
4. Recheck for DTCs. If the DTC resets, and the TCM power-up temperature sensor is not over 130°C (266°F), and the TFT is less than 120°C (248°F), replace the control solenoid (w/body and TCM) valve assembly. If the TCM power-up temperature sensor is over 130°C (266°F), inspect and repair the transmission cooler, transmission cooler fluid lines, engine cooling system, and transmission fluid level, and inspect for any obstructions in the cooling system airflow which may cause an overheat condition.
5. Inquire about customer towing or extreme driving conditions.

Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection .

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Control solenoid (w/body and TCM) valve assembly replacement. Refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for replacement, setup, and programming.
2. Perform the «Service Fast Learn Adapts»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__service-fast-learn-adapts) .

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The transmission control module (TCM) temperature sensor is located inside of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. The TCM temperature sensor provides the temperature of the TCM. This temperature reading is used in various shifting and diagnostic routines in the TCM software. This fault is handled inside the TCM and no external circuits are involved.

1. The engine speed is greater than 450 RPM.
2. No DTCs P0716, P0717, P0722, or P0723.

P0667

1. No DTCs P0667, P0711, P0712, or P0713.
2. DTC P0667 has not passed this key ON.
3. The TCM temperature is between -39 and +149°C (-38 and +300°F).

P0668

DTC P0668 has not failed this ignition cycle.

P0669

1. The transmission output shaft speed is greater than 200 RPM for greater than 200 seconds.
2. The TCC slip speed is equal to or greater than 120 RPM for 200 seconds or greater.
3. DTC P0669 has not failed this ignition cycle.

P0667

Fail Case 1

1. Vehicle speed is greater than 8 km/h (5 mph) for 300 seconds cumulative.
2. Torque converter clutch (TCC) slip speed is greater than 120 RPM for 300 seconds cumulative.
3. The TCM temperature is between -40 and +21°C (-40 and +70°F).
4. The TCM temperature has changed by less than 2.0°C (3.6°F) in 100 seconds.
5. The transmission fluid temperature (TFT) is greater than 70°C (158°F).
6. The TFT has increased by 55°C (99°F) since startup.

Fail Case 2

1. Vehicle speed is greater than 8 km/h (5 mph) for 300 seconds cumulative.
2. TCC slip speed is greater than 120 RPM for 300 seconds cumulative.
3. The TCM temperature is between 120-150°C (248-302°F).
4. The TCM temperature has changed by less than 2.0°C (3.6°F) in 100 seconds.
5. The TFT is greater than 70°C (158°F).
6. The TFT has increased by 55°C (99°F) since startup.

Fail Case 3

The TCM temperature changes by greater than or equal to 20°C (36°F) 14 times over 7 seconds.

The TCM temperature is greater than or equal to 161°C (321°F) for greater than 10 seconds.

P0669

The TCM temperature is less than or equal to -61°C (-77°F) for greater than 10 seconds.

1. DTCs P0667, P0668, and P0669 are Type C DTCs.
2. The TCM allows the vehicle to operate in transmission protection mode.

DTCs P0667, P0668, and P0669 are Type C DTCs.

Reprogram the TCM and retest the DTC to see if the DTC resets. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection before replacing the control solenoid (w/body and TCM) valve assembly.

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

P0667

1. Start the engine and operate the vehicle at 64 km/h (40 mph) while observing the TCM power up temperature sensor and the TCM temperature sensor.
2. The system is operating normally if the TCM power up temperature is within 10°C (18°F) of the TCM temperature sensor.

P0668 and P0669

Start the engine and check for DTCs P0668 and P0669.

1. Clear the DTC and operate the vehicle under the condition for running and setting the DTC.
2. Verify that the DTC does not reset. If the DTC resets, replace the control solenoid (w/body and TCM) valve assembly.

Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection .

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Control solenoid (w/body and TCM) valve assembly replacement. Refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for replacement, setup, and programming.
2. Perform the «Service Fast Learn Adapts»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__service-fast-learn-adapts) .

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The transmission fluid temperature (TFT) sensor is located inside of the transmission control module (TCM) assembly and is not serviced separately. The TFT sensor provides transmission fluid temperature to the TCM. This fault is handled inside the TCM and no external circuits are involved.

The engine speed is greater than 450 RPM.

P0711

1. No DTCs P0711, P0716, P0717, P0722, or P0723.
2. DTC P0711 not passed this key ON.
3. The TCM temperature sensor is between -39 and +149°C (-38 and +300°F).

P0712

DTC P0712 is not failed this ignition cycle.

P0713

1. The transmission output shaft speed is greater than 200 RPM for greater than 200 seconds.
2. The torque converter clutch (TCC) slip speed is equal to or greater than 120 RPM for 200 seconds or greater.
3. DTC P0713 is not failed this ignition cycle.

P0711

Fail Case 1

1. Vehicle speed is greater than 8 km/h (5 mph) for 300 seconds cumulative.
2. TCC slip speed is greater than 120 RPM for 300 seconds cumulative.
3. The TFT is between -40 and +21°C (-40 and +70°F).
4. The TFT has changed by less than 2.0°C (3.6°F) in 100 seconds.
5. The engine coolant temperature (ECT) is greater than 70°C (158°F).
6. The ECT has increased by 55°C (99°F) since startup.

Fail Case 2

1. Vehicle speed is greater than 8 km/h (5 mph) for 300 seconds cumulative.
2. TCC slip speed is greater than 120 RPM for 300 seconds cumulative.
3. The TFT is between 120-150°C (248-302°F).
4. The TFT has changes by less than 2.0°C (3.6°F) in 100 seconds.
5. The ECT is greater than 70°C (158°F).
6. The ECT has increased by 55°C (99°F) since startup.

Fail Case 3

The TCM power up temperature changes by greater than or equal to 20°C (36°F) 14 times over 7 seconds.

The TCM power up temperature is greater than or equal to 171°C (340°F) for greater than 10 seconds.

P0713

The TFT is less than or equal to -77°C (-106°F) for greater than 25 seconds.

1. DTCs P0711, P0712, and P0713 are Type C DTCs.
2. The TCM freezes transmission adaptive functions.
3. The TCM allows the vehicle to operate in transmission protection mode.

DTCs P0711, P0712, and P0713 are Type C DTCs.

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

1. Start the engine and operate the vehicle at 64 km/h (40 mph) while observing the TCM start up temperature sensor and the TFT sensor.
2. The system is operating normally if the TCM start up temperature is within 10°C (18°F) of the TFT temperature.

Clear the DTC and operate the vehicle under the conditions for running and setting the DTC. Verify that the DTC does not reset.

1. If the DTC resets, replace the control solenoid (w/body and TCM) valve assembly.

Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection .

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Control solenoid (w/body and TCM) valve assembly replacement. Refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for replacement, setup, and programming.
2. Perform the «Service Fast Learn Adapts»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__service-fast-learn-adapts) .

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

DTC P0716 or P0717

Typical Scan Tool Data

ISS Signal

ISS/OSS Supply Voltage

The input speed sensor (ISS) is a hall-effect type sensor. The ISS mounts to the control valve upper body assembly and connects to the control solenoid (w/body and TCM) valve assembly through a wire harness and connector. The sensor faces the 1-2-3-4 and 3-5-R clutch housing machined teeth surface. The sensor receives 8.3-9.3 volts on the input/output speed sensor (ISS/OSS) Supply Voltage circuit from the transmission control module (TCM). As the 1-2-3-4 and 3-5-R clutch housing rotates, the sensor produces a signal frequency based on the machined surface of the 1-2-3-4 and 3-5-R clutch housing. This signal is transmitted through the ISS signal circuit to the control solenoid (w/body and TCM) valve assembly. The control solenoid (w/body and TCM) valve assembly uses the ISS signal to determine line pressure, transmission shift patterns, torque converter clutch (TCC) slip speed and gear ratio.

P0716

1. No ISS DTC P0717.
2. No OSS DTCs P0722 or P0723.
3. The engine run time is greater than 5 seconds.
4. The vehicle speed is greater than 16 km/h (10 mph).
5. The calculated throttle position is greater than 8 percent.

P0717

1. No OSS DTCs P0722 or P0723.
2. The vehicle speed is greater than 16 km/h (10 mph).
3. The engine torque is greater than 50 N.m (37 lb ft).

P0716

1. The TCM detects an unrealistic drop in input shaft speed.
2. ISS DTC P0716 is not failed this ignition.
3. Transmission input speed is 686 RPM or greater for 2 seconds.
4. Transmission input speed drops 653 RPM for greater than 4 seconds and does not recover.

P0717

1. The TCM detects no output shaft speed when there is vehicle speed.
2. DTC P0717 is not failed this ignition.
3. Transmission input shaft speed is less than 100 RPM for 5 seconds.

1. P0716 and P0717 are Type A DTCs.
2. The TCM freezes transmission adaptive functions.
3. The TCM turns OFF all solenoids.

P0716 and P0717 are Type A DTCs.

Inspect the ISS, harness, connector, and control solenoid (w/body and TCM) valve assembly pins for metallic debris and the 1-2-3-4 and 3-5-R clutch housing machined teeth surface for damage or misalignment. Proper torque of the OSS mounting bolt is critical to proper OSS operation. Use the J 35616 GM-approved terminal test kit for any test that requires probing the control solenoid (w/body and TCM) valve assembly harness connector or a component harness connector. See Special Tools .

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

Scan Tool Reference

1. «Scan Tool Output Controls»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__scan-tool-output-controls)
2. «Scan Tool Data List»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__scan-tool-data-list)
3. «Scan Tool Data Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

Special Tools Required

J 35616 GM-Approved Terminal Test Kit. See Special Tools .

Start the engine in Park and observe the transmission ISS on the scan tool while varying the engine speed. The transmission ISS should vary with the engine speed and not drop out.

1. With the ignition ON, observe the transmission ISS/OSS supply voltage circuit status on the scan tool, the parameter should display OK. If the circuit status does not display OK, disconnect the ISS/OSS connector from the control solenoid (w/body and TCM) valve assembly and recheck the scan tool display. If the transmission ISS/OSS supply voltage circuit status still displays OK, visually inspect the ISS, harness, connector, the control solenoid (w/body and TCM) valve assembly pins for metallic debris and 1-2-3-4 and 3-5-R clutch housing machined teeth surface for damage or misalignment. Repair or replace any damaged components.
2. Perform the «Control Solenoid Valve and Transmission Control Module Assembly Input Shaft Speed/Output Shaft Speed Input Test»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__control-solenoid-valve-and-transmission-control) . The scan tool should display Transmission ISS between 100-400 RPM. If 100-400 RPM ISS RPM is displayed, replace the ISS/OSS assembly. If no ISS RPM is displayed or the RPM is out of range, replace the control solenoid (w/body and TCM) valve assembly.

Perform the Control Solenoid Valve and Transmission Control Module Assembly Input Shaft Speed/Output Shaft Speed Input Test .

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Perform the «Input and Output Speed Sensor Replacement»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) .
2. Control solenoid (w/body and TCM) valve assembly - refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for replacement, setup, and programming.
3. Perform the «Control Solenoid Valve and Transmission Control Module Assembly Inspection»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) .
4. Perform the «Control Solenoid Valve and Transmission Control Module Assembly Input Shaft Speed/Output Shaft Speed Input Test»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__control-solenoid-valve-and-transmission-control) .
5. Perform the «Service Fast Learn Adapts»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__service-fast-learn-adapts) .

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

DTC P0722 or P0723

Input Speed Sensor (ISS) Signal

ISS/OSS Supply Voltage

The output speed sensor (OSS) is a hall-effect type sensor. The OSS mounts to the control valve upper body assembly and connects to the control solenoid (w/body and TCM) valve assembly through a wire harness and connector. The sensor faces the output shaft machined teeth surface. The sensor receives 8.3-9.3 volts on the input/output speed sensor (ISS/OSS) supply voltage circuit from the transmission control module (TCM). As the output shaft rotates, the sensor produces a signal frequency based on the machined surface of the output shaft. This signal is transmitted through the OSS signal circuit to the TCM. The TCM uses the OSS signal to determine line pressure, transmission shift patterns, torque converter clutch (TCC) slip speed and gear ratio.

P0722

1. No ISS DTC P0717.
2. No OSS DTC P0723.
3. The selected range is not PARK or NEUTRAL.
4. The vehicle speed is greater than 16 km/h (10 mph).
5. The transmission input speed is between 500-6,500 RPM.
6. The engine speed is between 3,000-5,000 RPM.
7. The calculated throttle position is greater than 8 percent.

P0723

1. No ISS DTCs P0716 or P0717.
2. No OSS DTC P0722.
3. The engine run time is greater than 5 seconds.
4. Greater than 6 seconds since last range change.

P0722

1. The TCM detects no output shaft speed when there is vehicle speed.
2. The transmission output speed is less than or equal to 70 RPM for 5 seconds.

P0723

1. The TCM detects an unrealistic drop in output shaft speed.
2. ISS DTC P0723 has not failed this ignition.
3. The transmission output speed is 1,000 RPM or greater for 2 seconds.
4. The transmission output speed drops 1,300 RPM for greater than 4 seconds and does not recover.

1. The TCM freezes transmission adaptive functions.
2. The TCM turns OFF all solenoids.

Conditions for Clearing the DIC/DTC

DTCs P0722 and P0723 are Type A DTCs.

Inspect the OSS, harness, connector and control solenoid (w/body and TCM) valve assembly pins for metallic debris and output shaft machined face for damage or misalignment. Proper torque of the OSS mounting bolt is critical to proper OSS operation. Use the J 35616 GM-approved terminal test kit for any test that requires probing the control solenoid (w/body and TCM) valve assembly harness connector or a component harness connector. See Special Tools .

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

Scan Tool Reference

1. «Scan Tool Output Controls»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__scan-tool-output-controls)
2. «Scan Tool Data List»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__scan-tool-data-list)
3. «Scan Tool Data Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

Special Tools Required

J 35616 GM-Approved Terminal Test Kit. See Special Tools .

Operate the vehicle at 16-32 km/h (10-20 mph) while observing the transmission OSS on the scan tool. The transmission OSS should vary with the vehicle speed and not drop out.

1. Turn the ignition ON.
2. Observe the transmission ISS/OSS supply voltage circuit status on the scan tool. The parameter should display OK. If the parameter does not display OK, disconnect the ISS/OSS connector from the control solenoid (w/body and TCM) valve assembly and recheck the scan tool display. If the transmission ISS/OSS supply voltage circuit status still displays OK, visually inspect the OSS, harness, connector, the control solenoid (w/body and TCM) valve assembly pins for metallic debris and output shaft machined surface for damage or misalignment. Repair or replace the damaged components.
3. Perform the «Control Solenoid Valve and Transmission Control Module Assembly Input Shaft Speed/Output Shaft Speed Input Test»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__control-solenoid-valve-and-transmission-control) . The scan tool Transmission OSS parameter should display 100-400 RPM. If the Transmission OSS parameter is between 100-400 RPM, replace the ISS/OSS assembly. If no OSS RPM is displayed or the parameter is out of range, replace the control solenoid (w/body and TCM) valve assembly.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Perform the «Input and Output Speed Sensor Replacement»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) .
2. Control solenoid (w/body and TCM) valve assembly - refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for replacement, setup, and programming.
3. Perform the «Control Solenoid Valve and Transmission Control Module Assembly Inspection»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) .
4. Perform the «Control Solenoid Valve and Transmission Control Module Assembly Input Shaft Speed/Output Shaft Speed Input Test»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__control-solenoid-valve-and-transmission-control) .
5. Perform the «Service Fast Learn Adapts»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__service-fast-learn-adapts) .

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

The clutch pressure control (PC) solenoid 2 flows fluid to the 3-5-R clutch when commanded OFF and exhausts fluid when commanded ON. The clutch PC solenoid 2 regulates the transmission fluid pressure to the 3-5-R clutch. The transmission fluid pressure (TFP) switch 1 Opens (high) under fluid pressure and closes (low) when no pressure is present. The transmission control module (TCM) calculates gear ratio based on data from the automatic transmission input speed sensor (ISS) and the output speed sensor (OSS). The TCM compares the known transmission gear ratio to a calculated gear ratio for each commanded gear.

1. 3-5-R clutch is the primary on-coming clutch.
2. The commanded gear is Reverse.

TFP Switch 1 = Low (No fluid pressure)

DTC P0736 is a Type A DTC.

DTC P0736 is a Type A DTC.

When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to assist in duplicating the failure conditions. Ensure the transmission fluid level is correct and there are no leaks. If there are any other transmission DTCs set, diagnose those first.

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

1. Operate the vehicle to induce a shift from second to third gear while observing TFP Switch 1. Perform this action 2 times. The TFP Switch 1 should change states from Low to High. If the TFP Switch does not change states and no other DTCs set, replace the control solenoid (w/body and TCM) valve assembly. If any other DTCs set, diagnose that DTC first.
2. Operate the vehicle to obtain sixth gear 2 times and then check for DTCs other than DTC P0736. If any other DTCs set, diagnose that DTC first. If no other DTC sets, continue on with diagnostics.
3. Operate the vehicle by shifting from Park to Reverse, then while in reverse, operate the vehicle with the calculated throttle position greater than 8% for 5 seconds, perform this maneuver a minimum of 3 times. If the DTC P0736 resets, go to Component Testing.

1. Perform the «Line Pressure Check»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) .
2. Inspect the check ball 5 for possible sticking or damage. If you found a concern with this check ball, repair the concern.
3. Inspect the shift select valve 3 for sticking or damage. If you found a concern with the shift select valve 3, repair or replace the valve or valve body.
4. Inspect the low and reverse clutch assembly for wear or damage. If you found a low and reverse clutch assembly concern, repair or replace the low and reverse clutch assembly as necessary.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Control solenoid (w/body and TCM) valve assembly. Refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for replacement, setup, or programming.
2. Low and reverse clutch assembly replacement. Refer to Low and Reverse Clutch Overhaul in Unit Repair.
3. Lower valve body assembly. Refer to «Control Valve Lower Body and Upper Body Replacement»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) . Perform the valve body inspection procedure, refer to Control Valve Upper Body Assembly Cleaning and Inspection in Unit Repair. If the inspection procedure indicates to replace the valve body, refer to «Control Valve Lower Body and Upper Body Replacement»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) .
4. Perform the «Service Fast Learn Adapts»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__service-fast-learn-adapts) .

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

The torque converter clutch (TCC) pressure control (PC) solenoid is part of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. The shift solenoid (SS) 1 supplies transmission fluid to the TCC PC solenoid when commanded OFF. The TCC PC solenoid regulates transmission fluid through the TCC regulator valve in the lower valve body and the TCC control valve in the pump, to the TCC when commanded ON and exhausts fluid when commanded OFF. When the TCC is applied, the engine is coupled directly to the transmission.

1. No DTCs P0716 or P0717.
2. No DTCs P0722 or P0723.
3. No DTCs P2762, P2763, or P2764.
4. No DTCs P0741 or P0742.
5. The engine run time is greater than 5 seconds.
6. The transmission fluid temperature (TFT) is 20-130°C (68-266°F).
7. The calculated throttle position is between 8-90 percent.
8. The engine torque is greater than 50 N.m (36 lb ft).
9. The 2nd gear ratio is between 1.42-1.63.
10. The 4th gear ratio is between 1.06-1.23.
11. The 5th gear is between 0.79-0.90.
12. The 6th gear is between 0.62-0.71.
13. The TCC is commanded ON and is equal to or greater than 800 kPa for 2 seconds.

DTC P0741

The TCM detects TCC slip greater than 50 RPM for 6 seconds when the TCC is commanded ON. This must occur 2 times.

DTC P0742

The TCM detects the TCC slip between -12 and +13 RPM for 4 seconds when the TCC is commanded OFF. This must occur 3 times.

1. DTCs P0741 and P0742 are Type B DTCs.
2. Inhibit high gear in Hot Mode.
3. The TCM inhibits TCC.
4. The TCM freezes transmission adaptive functions.

DTCs P0741 and P0742 are Type B DTCs.

When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to assist in duplicating the failure conditions. Ensure the transmission fluid level is correct and there are no leaks.

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

Scan Tool Reference

1. «Scan Tool Output Controls»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__scan-tool-output-controls)
2. «Scan Tool Data List»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__scan-tool-data-list)
3. «Scan Tool Data Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

Special Tools Required

DT-47825 Control Solenoid Test Plate. See Special Tools .

1. Perform the «Transmission Fluid Check»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__transmission-fluid-check) .
2. Operate the vehicle in drive with the calculated throttle position greater than 8 percent and ensure TCC is commanded ON and OFF a minimum of 5 times. If the DTC resets, go to Component Testing.

1. Perform the «Control Solenoid Valve and Transmission Control Module Assembly Cleaning»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__control-solenoid-valve-and-transmission-control) in an attempt to clean or free up a potential sticking valve of dirt or debris. If the DTC resets after the cleaning procedure perform the «Control Solenoid Valve and Transmission Control Module Assembly Inspection»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) .
2. Perform the «Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__control-solenoid-valve-and-transmission-control) to test for a stuck open or stuck closed TCC PC solenoid valve inside of the control solenoid (w/body and TCM) valve assembly. If a stuck open or closed valve is found, replace the control solenoid (w/body and TCM) valve assembly.
3. Inspect the lower control valve body for a stuck valve, debris or damage. If you found a valve body concern, repair or replace the lower control valve body as necessary.
4. Inspect the TCC control valve in the pump. If you found a TCC control valve concern, repair or replace the TCC control valve or pump as necessary.
5. Inspect the torque converter assembly for damage or discoloration. If you found a torque converter assembly concern, replace the torque converter assembly as necessary.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Control valve body replacement: Refer to «Control Valve Lower Body and Upper Body Replacement»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) .
2. Perform the «Torque Converter Replacement»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) .
3. control solenoid (w/body and TCM) valve assembly replacement: Refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for replacement, setup, and programming.
4. Transmission pump repair or replacement: Refer to Torque Converter Housing with Fluid Pump Removal and Torque Converter Housing with Fluid Pump Installation in the Transmission Unit Repair Manual.
5. Perform the «Service Fast Learn Adapts»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__service-fast-learn-adapts) .

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The shift solenoid (SS) valve 1 is part of the lower control valve body. The SS valve 1 is a normally closed (NC) solenoid valve and controls fluid to the clutch select valve 3- and related clutches. During this diagnostic test, intrusive actions are taken by the transmission control module (TCM) to test the SS valve 1 to see if the valve is stuck OFF. When in first gear engine braking, if first gear ratio is not achieved in a predetermined period of time and the closest gear ratio detected if fourth, the TCM commands second gear and if second gear ratio is attained this indicates a stuck OFF SS valve 1 and the DTC will set.

1. No DTCs P0716, P0717, P0722 or P0723.
2. No DTCs P1915 or P1825.
3. First gear locked is commanded.
4. Commanded gear slip is equal to or less than 75 RPM for 2 seconds.

Fail Case 1 and Fail Case 2 must occur in sequential order.

Fail Case 1

Commanded gear equals first lock and gear box slip equals greater than 100 RPM for 3 seconds.

Fail Case 2

Commanded gear equals first lock and gear ratio equals fourth and gear box slip is between 35-100 RPM within 0.5-1.0 seconds.

DTC P0751 is a Type A DTC.

DTC P0751 is a Type A DTC.

When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to assist in duplicating the failure conditions. Ensure the transmission fluid level is correct and there are no leaks.

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

Special Tools Required

DT-47825 Control Solenoid Test Plate. See Special Tools .

1. Perform the «Transmission Fluid Check»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__transmission-fluid-check) .
2. Operate the vehicle in drive from a complete stop, with the calculated throttle position greater than 15 percent to obtain 56 km/h (35 mph) 2 times. If the DTC resets, go to Circuit/System Testing.

1. Perform the «Line Pressure Check»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) . If the pressure is out of specification correct that concern first.
2. Perform the «Control Solenoid Valve and Transmission Control Module Assembly Cleaning»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__control-solenoid-valve-and-transmission-control) and retest the DTC as outlined in the Circuit/System Verification steps. If the DTC resets, continue on with testing.
3. Perform the «Control Solenoid Valve and Transmission Control Module Assembly Inspection»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) . If a concern is found, repair or replace the control solenoid (w/body and TCM) valve assembly.
4. Perform the «Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__control-solenoid-valve-and-transmission-control) . If the shift solenoid 1 is found to be leaking or stuck OFF, replace the control solenoid (w/body and TCM) valve assembly.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Replace the control solenoid (w/body and TCM) valve assembly. Refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for replacement, setup, or programming.
2. Perform the «Service Fast Learn Adapts»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__service-fast-learn-adapts) .

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The shift solenoid (SS) valve 1 is part of the lower control valve body. The SS valve 1 is a normally closed (NC) solenoid valve and controls fluid to the clutch select valve 2 and related clutches. The transmission control module (TCM) looks for a good shifts from first gear engine braking, to first gear freewheel, to second gear and then if third gear indicates neutral, and the TFP Sw 5 does not change states, the TCM sets the DTC.

1. No DTCs P0716, P0717, P0722, or P0723.
2. No DTCs P1825 or P1915.

1. The commanded gear is third.
2. The attained gear slip is equal to or greater than 75 RPM for 2 seconds.
3. The TFP Switch 5 does not change states after third gear command.
4. Commanded gear has achieved first lock, first freewheel or second gear and current commanded gear equals third, gear box slip is equal to or greater than 100 RPM for 3 seconds.

DTC P0752 is a Type A DTC.

DTC P0752 is a Type A DTC.

When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to assist in duplicating the failure conditions. Ensure the transmission fluid level is correct and there are no leaks.

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

Special Tools Required

DT-47825 Control Solenoid Test Plate. See Special Tools .

1. Perform the «Transmission Fluid Check»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__transmission-fluid-check) .
2. Operate the vehicle in drive from a complete stop, with the calculated throttle position greater than 15 percent to obtain 72 km/h (45 mph) 2 times. If the DTC resets, go to Circuit/System Testing.

1. Perform the «Line Pressure Check»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) . If the pressure is out of specification correct that concern first.
2. Perform the «Control Solenoid Valve and Transmission Control Module Assembly Cleaning»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__control-solenoid-valve-and-transmission-control) and retest the DTC as outlined in the Circuit/System Verification steps. If the DTC resets, continue on with testing.
3. Perform the «Control Solenoid Valve and Transmission Control Module Assembly Inspection»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) . If a concern is found, repair or replace the control solenoid (w/body and TCM) valve assembly.
4. Perform the «Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__control-solenoid-valve-and-transmission-control) . If the shift solenoid 1 is found to be leaking or stuck ON, replace the control solenoid (w/body and TCM) valve assembly.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Replace the control solenoid (w/body and TCM) valve assembly - refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for replacement, setup, or programming.
2. Perform the «Service Fast Learn Adapts»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__service-fast-learn-adapts) .

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The shift solenoid (SS) valve 2 is part of the lower control valve body. The SS valve 2 is a normally closed (NC) solenoid valve and controls fluid to the clutch select valve 3- and related clutches. During this diagnostic test, intrusive actions are taken by the transmission control module (TCM) to test the SS valve 2 to see if the valve is stuck OFF. When in first gear engine braking, if first gear ratio is not achieved in a predetermined period of time, the TCM commands second gear and if second gear ratio is attained this indicates a stuck OFF SS valve 2 and the DTC will set.

1. No DTCs P0716 or P0717.
2. No DTC P0722 or P0723.
3. No DTCs P1825 or P1915.
4. Calculated throttle position is equal to or greater than 10 percent.
5. Engine torque is between 120-1,492 N.m (89-1,100 lb ft).
6. Transmission fluid temperature (TFT) is equal to or greater than 0°C (32°F).

1. The TCM detects second gear ratio is achieved.
2. Fail Case 1 and Fail Case 2 must occur in sequential order.

Commanded gear equals first lock or first freewheel and gearbox slip is equal or greater than 100 RPM.

Commanded gear equals second and second gear box slip is less than or equal to 35 RPM or gear box slip is equal to or less than 100 RPM and shift time-out occurs and PC Sol 4 commanded pressure is at maximum.

DTC P0756 is a Type A DTC.

DTC P0756 is a Type A DTC.

When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to assist in duplicating the failure conditions. Ensure the transmission fluid level is correct and there are no leaks.

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

Special Tools Required

DT-47825 Control Solenoid Test Plate. See Special Tools .

1. Perform the «Transmission Fluid Check»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__transmission-fluid-check) .
2. Operate the vehicle in drive with the calculated throttle position greater than 15 percent to obtain 56 km/h (35 mph) 2 times. If the DTC resets, go to Circuit/System Testing.

1. Perform the «Line Pressure Check»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) . If the pressure is out of specification correct that concern first.
2. Perform the «Control Solenoid Valve and Transmission Control Module Assembly Cleaning»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__control-solenoid-valve-and-transmission-control) and retest the DTC as outlined in the Circuit/System Verification steps. If the DTC resets, continue on with testing.
3. Perform the «Control Solenoid Valve and Transmission Control Module Assembly Inspection»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) . If a concern is found, repair or replace the control solenoid (w/body and TCM) valve assembly.
4. Perform the «Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__control-solenoid-valve-and-transmission-control) . If the solenoid is found to be leaking or stuck OFF, replace the control solenoid (w/body and TCM) valve assembly.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Replace the control solenoid (w/body and TCM) valve assembly. Refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for replacement, setup, or programming.
2. Perform the «Service Fast Learn Adapts»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__service-fast-learn-adapts) .

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

The clutch pressure control (PC) solenoid 2 is part of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. The clutch PC solenoid 2 flows fluid to the 3-5-R clutch when commanded OFF and exhausts fluid when commanded ON. The clutch PC solenoid 2 regulates the transmission fluid pressure to the 3-5-R clutch. The TCM calculates gear ratio based on data from the automatic transmission input speed sensor (ISS) and the output speed sensor (OSS). The TCM compares the known transmission gear ratio to a calculated gear ratio for each commanded gear.

1. No DTCs P0716 or P0717.
2. No DTCs P0722 or P0723.
3. No DTCs P1825 or P1915.
4. Transmission Fluid Temperature (TFT) is equal to or greater than 0°C (32°F).

DTC P0776

1. The transmission input shaft speed is greater than 60 RPM.
2. 3-5-R clutch is commanded ON.

DTC P0777

1. The transmission output shaft speed is greater than 200 RPM.
2. 3-5-R clutch is commanded OFF.

DTC P0776

The TCM detects an incorrect on-coming clutch gear ratio, or flare, when the 3-5-R clutch is commanded ON for 0.5 seconds and the transmission input shaft speed is greater than 75 RPM from the anticipated input shaft speed.

DTC P0777

The TCM detects an incorrect off-going clutch gear ratio, or tie-up, when the 3-5-R clutch is commanded OFF for 0.2 seconds and the transmission input shaft speed is less than 40 RPM from the anticipated input shaft speed.

1. DTCs P0776 and P0777 are Type A DTCs. Refer to «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) and «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype) .
2. The TCM commands maximum line pressure.
3. The TCM inhibits TCC.
4. The TCM freezes transmission adaptive functions.

DTCs P0776 and P0777 are Type A DTCs.

When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to assist in duplicating the failure conditions.

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

Scan Tool Reference

1. «Scan Tool Output Controls»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__scan-tool-output-controls)
2. «Scan Tool Data List»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__scan-tool-data-list)
3. «Scan Tool Data Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

Special Tools Required

1. DT-47825 Control Solenoid Test Plate. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__special-tools) .
2. DT-47825-10 Jumper Harness. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__special-tools) .

1. Perform the «Transmission Fluid Check»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__transmission-fluid-check) .
2. Operate the vehicle in drive with the calculated throttle position greater than 15% to obtain 72 km/h (45 mph). Perform this maneuver 2 times. If the DTC resets, go to Circuit/System Testing.

1. Perform the «Line Pressure Check»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) . If the pressure is out of specification, correct this concern first.
2. Perform the «Control Solenoid Valve and Transmission Control Module Assembly Cleaning»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__control-solenoid-valve-and-transmission-control) and retest the DTC as outlined in the Circuit/System Verification steps. If the DTC resets, continue on with testing.
3. Perform the «Control Solenoid Valve and Transmission Control Module Assembly Inspection»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) . If a concern is found, repair or replace the control solenoid (w/body and TCM) valve assembly.
4. Perform the «Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__control-solenoid-valve-and-transmission-control) . If the solenoid is found to be leaking or stuck closed, replace the control solenoid (w/body and TCM) valve assembly.
5. Inspect the control valve upper body assembly for sticking valves, damage, scored bores, or debris. If a concern if found in the valve body, repair or replace the valve body as necessary.
6. Inspect the 3-5-R clutch assembly for damage. If a concern is found in the 3-5-R clutch assembly, repair or replace as necessary.

PC Sol 2 Operation

1. Perform the «Diagnostic Repair Verification»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-repair-verification) after completing the diagnostic procedure. Control valve body replacement. Refer to «Control Valve Lower Body and Upper Body Replacement»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) .
2. 3-5-R clutch assembly repair or replace. Refer to 1-2-3-4 and 3-5 Reverse Clutch Overhaul in the Transmission Unit Repair Manual.
3. Control solenoid (w/body and TCM) valve assembly replacement. Refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for replacement, setup, and programming.
4. Perform the «Service Fast Learn Adapts»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__service-fast-learn-adapts) .

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The clutch pressure control (PC) solenoid 3 is part of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. The clutch PC solenoid 3 flows fluid to the low and reverse, and the 4-5-6 clutch. The clutch PC solenoid 3 regulates the transmission fluid pressure to the low and reverse, and 4-5-6 clutch. The TCM calculates gear ratio based on data from the automatic transmission input speed sensor (ISS) and the output speed sensor (OSS). The TCM compares the known transmission gear ratio to a calculated gear ratio for each commanded gear.

1. No DTCs P0716 or P0717.
2. No DTCs P0722 or P0723.
3. No DTCs P1825 or P1915.
4. Transmission Fluid Temperature (TFT) is equal to or greater than 0°C (32°F).

DTC P0796

1. The transmission input shaft speed is greater than 60 RPM.
2. low and reverse/4-5-6 clutch is commanded ON.

DTC P0797

1. The transmission output shaft speed is greater than 200 RPM.
2. low and reverse/4-5-6 clutch is commanded OFF.

DTC P0796

The TCM detects an incorrect on-coming clutch gear ratio, or flare, when the low and reverse/4-5-6 clutch is commanded OFF for 0.5 seconds and the transmission input shaft speed is greater than 75 RPM from the anticipated input shaft speed.

DTC P0797

The TCM detects an incorrect off-going clutch gear ratio, or tie-up, when the low and reverse/4-5-6 clutch is commanded ON for 0.2 seconds and the transmission input shaft speed is less than 40 RPM from the anticipated input shaft speed.

1. DTCs P0796 and P0797 are Type A DTCs.
2. The TCM commands maximum line pressure.
3. The TCM inhibits the torque converter clutch (TCC).
4. The TCM freezes transmission adaptive functions.

DTCs P0796 and P0797 are Type A DTCs.

When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to assist in duplicating the failure conditions.

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

Scan Tool Reference

1. «Scan Tool Output Controls»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__scan-tool-output-controls)
2. «Scan Tool Data List»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__scan-tool-data-list)
3. «Scan Tool Data Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

Special Tools Required

1. DT-47825 Control Solenoid Test Plate. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__special-tools) .
2. DT-47825-10 Jumper Harness. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__special-tools) .

1. Perform the «Transmission Fluid Check»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__transmission-fluid-check) .
2. Turn ON the ignition, with the engine OFF.
3. Record the DTC Freeze Frame and Failure Records.
4. Clear the DTC.
5. Operate the vehicle in DRIVE with the calculated throttle position greater than 15% to obtain 72 km/h (45 mph) and achieve 5th gear. Perform this maneuver 2 times. If the DTC resets, go to Circuit/System Testing.

1. Perform the «Line Pressure Check»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) If the pressure is out of specification, correct this concern first.
2. Perform the «Control Solenoid Valve and Transmission Control Module Assembly Cleaning»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__control-solenoid-valve-and-transmission-control) and retest the DTC as outlined in the Circuit/System Verification steps. If the DTC resets, continue on with testing.
3. Perform the «Control Solenoid Valve and Transmission Control Module Assembly Inspection»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) . If a concern is found, repair or replace the control solenoid (w/body and TCM) valve assembly.
4. Perform the «Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__control-solenoid-valve-and-transmission-control) . If the solenoid is found to be leaking or stuck closed, replace the control solenoid (w/body and TCM) valve assembly.
5. Inspect the control valve upper body assembly for sticking valves, damage, scored bores, or debris. If a concern if found in the valve body, repair or replace the valve body as necessary.
6. Inspect the low and reverse/4-5-6 clutch assembly for damage. If a concern is found in the low and reverse/4-5-6 clutch assembly, repair or replace as necessary.

Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection .

PC Sol 3 Operation

1. Perform the «Diagnostic Repair Verification»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-repair-verification) after completing the diagnostic procedure. Control valve body replacement. Refer to «Control Valve Lower Body and Upper Body Replacement»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) .
2. low and reverse/4-5-6 clutch assembly repair or replace. Refer to Low and Reverse Clutch Overhaul and 4-5-6 Clutch Overhaul in the Transmission Unit Repair Manual.
3. control solenoid (w/body and TCM) valve assembly replacement. Refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for replacement, setup, and programming.
4. Perform the «Service Fast Learn Adapts»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__service-fast-learn-adapts) .

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Driver Shift Request

The TAP Shift/Driver Shift Control (DSC) allows the driver to shift gears by using the TAP switches located on the automatic transmission shifter. Pushing forward on the shifter will command an upshift and pulling back will command a downshift. Ignition voltage flows from the ignition 3 fuse through the TAP Switch resistor array to the Transmission Control Module (TCM). The TAP system is activated when the gear shift lever is in the D position and moved over into the DSC gate area. When the shifter is moved over into the DSC gate area, the TAP enable switch is closed and completes the TAP enable circuit from the Body Control Module (BCM) to ground.

The engine speed is between 500-6,500 RPM for at least 5 seconds.

P0815 or P0816

1. No DTC P0826.
2. No DTCs P1815 or P1826.
3. The time since the last gear selector range change is greater than 6 seconds.

P0826

1. Ignition voltage is 8.6-19.0 volts.
2. Engine speed is 500-6500 RPM for at least 5 seconds.

P1876

1. No DTC U0100.
2. No DTCs P0815, P0816, or P0826.
3. No DTCs P1825 or P1915.

P0815

The TCM detects an upshift request for 3 seconds in PARK, REVERSE, NEUTRAL, or D and for 600 seconds in PARK, REVERSE, NEUTRAL, OR D.

P0816

The TCM detects a downshift request for 3 seconds in PARK, REVERSE, NEUTRAL, or D and for 600 seconds in PARK, REVERSE, NEUTRAL, or D.

P0826

The TCM detects an invalid voltage on the TAP Up/Down Signal Circuit for 5 seconds.

P1876

The TCM detects a TAP Enable Switch request 3 times when not in D6 range for 2 seconds.

1. DTCs P0815, P0816, P0826, and P1876 are Type C DTCs.
2. The TCM disables TAP shift functions.

DTCs P0815, P0816, P0826, and P1876 are Type C DTCs.

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

P0815, P0816, or P0826

With the engine ON, engage the Tap Up and Tap Down switch positions while observing the Driver Shift Request scan tool parameter. The parameter should change to reflect the selected Up or Downshift switch position and with no Up or Downshift switch position selected the parameter should display None.

1. If the parameter does not change to reflect the selected position, proceed to Circuit/System Testing.

With the engine ON, move the transmission range selector from the Park (P) range to the Drive (D6) range and over into the DSC gate while observing the Tap Up/Down Enable parameter on the scan tool in Body and Accessories/Instrument Panel scan tool data list. The parameter should display Enabled when in the DSC gate area, and Disabled in all other ranges.

1. If the parameter does not change when the transmission range selector is in the DSC gate, proceed to Circuit/System Testing.

P0815

1. Select the Driver Shift Request parameter.
2. Disconnect the Automatic Transmission (AT) shift program switch connector. If the parameter status changes from Upshift to Invalid, replace the AT shift program switch. If the parameter status does not change, replace the control solenoid (w/body and TCM) valve assembly.

P0816

1. Select the Driver Shift Request parameter.
2. Disconnect the Automatic Transmission (AT) shift program switch connector. If the parameter status changes from Downshift to Invalid, replace the AT shift program switch. If the parameter status does not change, replace the control solenoid (w/body and TCM) valve assembly.

P0826

1. Inspect the fuse in the ignition 3 voltage circuit for an open. If the fuse is Open, test the ignition 3 and the Tap/Up and Tap/down circuit for a short to ground. If the fuse is OK, test the ignition 3 and the Tap/Up and Tap/down signal circuit for an Open or Short to Voltage.
2. Test the AT/DSC shift program switch for correct resistance value, 8.11-8.39 ohms. If the resistance is not within specifications, replace the switch assembly. If the resistance is within specifications, replace the control solenoid (w/body and TCM) valve assembly.

Key On, engine Off, in PARK, disconnect the Tap Up/Tap Down Enable Switch connector from the switch. Using a scan tool, observe the Tap Up/Down Enable parameter in Body and Accessories/Instrument Panel scan tool data list. The parameter should display Disabled.

1. If the parameter does not display Disabled while disconnected, test the Tap Up/Tap Down Enable signal circuit for a short to ground. If no short to ground is found, replace the BCM.
2. If the parameter displays Disabled when disconnected and Enabled when connected, ensure the mechanical enable switch linkage is not bent, binding, or damaged and if no concerns are found, replace the Tap Up/Tap Down Enable switch.
3. If the parameter displays Disabled at all times, test the Tap Up/Tap Down ground circuit for an open or short to voltage.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Replace the AT shift program switch. Refer to «Automatic Transmission Control Replacement»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-5l40-e5l50-e-introduction-2-of-2) .
2. Replace the control solenoid (w/body and TCM) valve assembly. Refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for replacement, setup, and programming.

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

DTC P0842 or P0843

TFP Switches

The transmission fluid pressure (TFP) switch 1 is part of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. The TCM supplies 12 volts to the TFP Switch 1 on the TFP Switch 1 signal circuit; the TFP Switch 1 has an internal case ground. TFP Switch 1 is normally closed, Low. When oil pressure is present at the TFP Switch 1, the switch is Open, High. The normally high clutch pressure control (PC) solenoid 2 controls the transmission fluid to the 3-5-R clutch. The TCM monitors the normally closed TFP Switch 1 signal circuit to determine the 3-5-R clutch status.

1. No DTCs P0120, P0711, P0712, or P0713.
2. No DTCs P0965, P0966, P0967, P0968, P0969, P0970, or P0971.
3. No DTCs P0973, P0974, P0976, P0977, P2719, P2720, P2728, P2729, or P2730.
4. No DTCs P1825 or P1915.
5. Ignition voltage is between 11-15 volts.
6. The transmission fluid temperature (TFT) is 20-150°C (68-302°F).

P0842

The TCM detects that the TFP switch 1 signal voltage remains low, 0 volts when the 3-5-R clutch is commanded ON for 5 seconds.

P0843

The TCM detects that the TFP switch 1 signal voltage is high, 12 volts when the 3-5-R clutch is commanded OFF.

1. DTCs P0842 and P0843 are Type C DTCs.
2. The TCM freezes transmission adaptive functions.

DTCs P0842 and P0843 are Type C DTCs.

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

If there are any other transmission related DTCs set, diagnose those DTCs first.

1. Ensure the TFT is near the temperature displayed in the Failure Records.
2. Start the engine and observe the TFP Switch 1 parameter while moving the range selector lever from Park to Reverse. The TFP Switch 1 should transition from Hi in Park to Low in Reverse. If the TFP Switch 1 parameter does not change, perform the «Control Solenoid Valve and Transmission Control Module Assembly Inspection»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) . If no concerns are found, replace the control solenoid valve and TCM assembly.

Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection .

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Control solenoid (w/body and TCM) valve assembly replacement. Refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for replacement, setup, and programming.
2. Perform the «Service Fast Learn Adapts»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__service-fast-learn-adapts) .

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

DTC P0851 or P0852

Scan Tool Parameter Data

PNP Switch - ECM

The transmission manual shift shaft switch assembly, also known as the Internal Mode Switch (IMS), is a sliding contact switch attached to the manual shift shaft inside the transmission case. The Park/Neutral Position (PNP) Switch is integrated into the IMS and connects to the Transmission Control Module (TCM) lead-frame through a short wire harness. The 5 inputs to the TCM from the transmission manual shift shaft switch assembly indicate the transmission gear selector lever position. This information is used for engine start enable, engine controls as well as determining the transmission shift patterns. The state of each input is available for display on the scan tool. The five input parameters represented are Signal A, Signal B, Signal C, Signal P (Parity), and Signal N (Park/Neutral Start Signal). Park/Neutral Signal is sent from the Park/Neutral switch directly to the Engine Control Module (ECM) and is used for engine start enable. The Park/Neutral Signal circuit is not connected to the TCM internally; the circuit uses the TCM as a pass-through connector only. The ECM Park/Neutral diagnostic monitors the Park/Neutral Signal circuit to detect Low voltage when the ECM expects to see High voltage and High voltage when the ECM expects to see Low voltage.

P0851

1. Ignition voltage is between 9-18 volts.
2. No TCM DTCs P0601, P0602, P0603, or P0604.
3. No IMS DTCs P1825 or P1915.
4. No Communication DTCs U0001, U0100, U0101, U2105, or U2106.

P0852

1. No TP DTCs P0121, P0122, P0123.
2. No OSS DTCs P0722 or P0723.
3. No MAF DTCs P0101, P0102, or P0103.
4. No MAP DTCs P0106, P0107, or P0108.
5. Engine Speed is greater than 400 RPM.

P0851

1. The ECM detects the Park/Neutral switch signal equals 0 volts (Low) when the IMS reports a Drive range for 3 seconds.
2. TP is equal to or greater than 10 percent.
3. Engine torque is equal to or greater than 75 N.m (55 lb ft).
4. Vehicle speed is equal or greater than 10 km/h (6 mph).

P0852

The ECM detects the Park/Neutral switch signal equals 12 volts (High) when the IMS reports a Park/Neutral range for 3 seconds.

1. DTC P0851 and P0852 are Type C DTCs.
2. The ECM uses IMS Range for engine start-up.

DTC P0851 and P0852 are Type C DTCs.

It is possible for this DTC to set due to a stack-up or misalignment issue between the IMS and the P/N Switch, where no electrical fault is present. Ensure the gear shift selector cable is properly adjusted and there are no service bulletins that address this concern before replacing parts.

Schematic Reference

1. «Automatic Transmission Controls Schematics»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Engine Controls Schematics»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-44l-introduction-2-of-2)

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
4. «Engine Control Module Connector End Views»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-44l-introduction-2-of-2)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

If there are any other engine or transmission related DTCs set, diagnose those DTCs first. With a scan tool observe the Park/Neutral switch parameter in Engine Controls data list and move the gear shift lever from Park, to Reverse and through all the ranges and observe the parameter as you move the shift lever. The parameter should display Park/Neutral when in Park or Neutral and In-Gear when in Reverse, Drive or Drive Low. It is especially important to closely observe the Park and Neutral to Drive transitional positions while moving the shift lever and observing for possible misalignment or slack in the shifter mechanism.

1. Ignition OFF, transmission in Park or Neutral, disconnect the transmission 16-way connector.
2. Test for less than 1 ohm of resistance between the Park/Neutral signal circuit terminal 3 on the transmission side and the ground circuit terminal 5. If greater than the specified range, test the signal circuit inside the transmission for an open/high resistance. If the circuit tests normal, test or replace the IMS.
3. Ignition On, verify the scan tool parameter Park/Neutral displays In-gear. If not the specified value, test the signal circuit for a short to ground. If the circuit tests normal, replace the ECM.
4. Install a fused jumper between the signal circuit and ground. Verify the scan tool parameter Park/Neutral displays Park/Neutral. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the ECM.

1. Ignition OFF, transmission in Park or Neutral, disconnect the transmission 16-way connector and the IMS from the control solenoid (w/body and TCM) valve assembly.
2. Test for infinite resistance between the control solenoid (w/body and TCM) valve assembly 16-way connector pin 3 and the IMS connector pin on the control solenoid (w/body and TCM) valve assembly side with the switch in the Open position. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the control solenoid (w/body and TCM) valve assembly.
3. Test for infinite resistance between the IMS connector pin F and the IMS case ground with the switch in the Open position. If not the specified value, replace the IMS.
4. Perform the «Control Solenoid Valve and Transmission Control Module Assembly Inspection»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) .

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. ECM replacement. Refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for replacement, setup, and programming.
2. IMS replacement. Refer to «Manual Shift Shaft Position Switch Replacement»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) .
3. Control solenoid (w/body and TCM) valve assembly replacement. Refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for replacement, setup, and programming.

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

DTC P0872 or P0873

TFP Switches

The transmission fluid pressure (TFP) switch 3 is part of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. The TCM supplies 12 volts to the TFP switch 3 on the TFP switch 3 signal circuit; the TFP switch 3 has an internal case ground. TFP switch 3 is normally closed, Low. When oil pressure is present at the TFP switch 3, the switch is Open, High. The normally low clutch pressure control (PC) solenoid 4 controls the transmission fluid to the 2-6 clutch. The TCM monitors the normally closed TFP switch 3 signal circuit to determine the 2-6 clutch status.

1. No DTCs P0120, P0711, P0712, or P0713.
2. No DTCs P0965, P0966, P0967, P0968, P0969, P0970, or P0971.
3. No DTCs P0973, P0974, P0976, P0977, P2719, P2720, P2728, P2729, or P2730.
4. No DTCs P1825 or P1915.
5. Ignition voltage is between 11-15 volts.
6. The transmission fluid temperature (TFT) is 20-150°C (68-302°F).

P0872

The TCM detects that the TFP switch 3 signal voltage remains low, 0 volts when the 2-6 clutch is commanded ON for 5 seconds.

P0873

The TCM detects that the TFP switch 3 signal voltage is high, 12 volts when the 2-6 clutch is commanded OFF.

1. DTCs P0872 and P0873 are Type C DTCs.
2. The TCM freezes transmission adaptive functions.

DTCs P0872 and P0873 are Type C DTCs.

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

If there are any other transmission related DTCs set, diagnose those DTCs first.

1. Ensure the TFT is near the temperature displayed in the Failure Records.
2. Start the engine and place the transmission range selector in D6.
3. Observe the TFP Switch 3 parameter while commanding 1st gear and then commanding 2nd gear with the scan tool. The TFP Switch 3 should transition from Low in 1st gear to High in 2nd gear. If the TFP Switch 3 parameter state does not change, perform the «Control Solenoid Valve and Transmission Control Module Assembly Inspection»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) . If no concerns are found, replace the control solenoid (w/body and TCM) valve assembly.

Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection .

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Control solenoid (w/body and TCM) valve assembly replacement. Refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for replacement, setup, and programming.
2. Perform the «Service Fast Learn Adapts»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__service-fast-learn-adapts) .

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

DTC P0877 or P0878

TFP Switches

The transmission fluid pressure (TFP) switch 4 is part of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. The TCM supplies 12 volts to the TFP switch 4 on the TFP switch 4 signal circuit; the TFP switch 4 has an internal case ground. TFP switch 4 is normally closed, Low. When oil pressure is present at the TFP switch 4, the switch is open, high. The normally low clutch pressure control (PC) solenoid 4 controls the transmission fluid to the 1-2-3-4 clutch. The TCM monitors the normally closed TFP switch 4 signal circuit to determine the 1-2-3-4 clutch status.

1. No DTCs P0120, P0711, P0712, or P0713.
2. No DTCs P0965, P0966, P0967, P0968, P0969, P0970, or P0971.
3. No DTCs P0973, P0974, P0976, P0977, P2719, P2720, P2728, P2729, or P2730.
4. No DTCs P1825 or P1915.
5. Ignition voltage is between 11-15 volts.
6. The transmission fluid temperature (TFT) is 20-150°C (68-302°F).

P0877

The TCM detects that the TFP switch 4 signal voltage remains low, 0 volts when the 1-2-3-4 clutch is commanded ON for 5 seconds.

P0878

The TCM detects that the TFP switch 4 signal voltage is high, 12 volts when the 1-2-3-4 clutch is commanded OFF.

1. DTCs P0877 and P0878 are Type C DTCs.
2. The TCM freezes transmission adaptive functions.

DTCs P0877 and P0878 are Type C DTCs.

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

If there are any other transmission related DTCs set, diagnose those DTCs first.

1. Ensure the TFT is near the temperature displayed in the Failure Records.
2. Start the engine and place the transmission range selector in D6.
3. Observe the TFP switch 4 parameter while commanding 4th gear and then commanding 5th gear with the scan tool. The TFP Switch 4 should transition from High in 4th gear to Low in 5th gear. If the TFP switch 4 parameter state does not change, perform the «Control Solenoid Valve and Transmission Control Module Assembly Inspection»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) . If no concerns are found, replace the control solenoid (w/body and TCM) valve assembly.

Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection .

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Control solenoid (w/body and TCM) valve assembly replacement. Refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for replacement, setup, and programming.
2. Perform the «Service Fast Learn Adapts»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__service-fast-learn-adapts) .

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

DTC P0961, P0962 or P0963

Line PC Solenoid

The line pressure control (PC) solenoid is part of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. The line PC solenoid regulates the transmission fluid line pressure. The TCM varies the current to the normally high line PC solenoid valve from 0.1 amp for maximum line pressure, to 1.1 amps for minimum line pressure. This is accomplished by varying the desired line pressure in kPa (psi).

1. The engine run time is greater than 5 seconds.
2. The line PC solenoid is commanded ON or OFF.

P0961

DTC P0961 is not failed this ignition.

P0962

DTC P0962 is not failed this ignition.

P0963

DTC P0963 is not failed this ignition.

The TCM detects an internal electrical performance malfunction of the line PC solenoid control circuit and the actual line pressure does not equal the commanded line pressure for 300 milliseconds.

The TCM detects an internal low voltage electrical malfunction of the line PC solenoid control circuit for 300 milliseconds.

The TCM detects an internal high voltage electrical malfunction of the line PC solenoid control circuit for 300 milliseconds.

P0962

1. DTC P0962 is a Type A DTC.
2. The TCM defaults the transmission to 3rd gear if the current gear is 1st, 2nd, or 3rd, or 5th gear if the current gear if 4th, 5th, or 6th gear.
3. The TCM inhibits the torque converter clutch (TCC).
4. The TCM commands maximum line pressure.
5. The TCM freezes transmission adaptive functions.

P0961 or P0963

1. DTCs P0961 and P0963 are Type C DTCs.
2. The TCM freezes transmission adaptive functions.

1. DTCs P0961 and P0963 are Type C DTCs.
2. DTC P0962 is a Type A DTC.

When attempting to set DTCs, ensure the TCM is warmed up and the transmission is operated in 2nd gear long enough to ensure a 3°C (5°F) increase in TCM substrate temperature. This will place the TCM under the optimal conditions to test DTCs.

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

Scan Tool Reference

1. «Scan Tool Output Controls»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__scan-tool-output-controls)
2. «Scan Tool Data List»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__scan-tool-data-list)
3. «Scan Tool Data Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

1. Ensure the transmission fluid temperature is between 50-80°C (122-176°F).
2. Operate the vehicle in 2nd gear long enough to ensure at least a 3°C (5°F) rise in TCM temperature, then operate the vehicle in Park for 5 seconds.
3. Observe the scan tool data parameter Line PC Sol. CKT Status, the parameter should display OK. If the parameter displays Open, Short to Volts, Short to GND or if the DTC resets, perform the «Control Solenoid Valve and Transmission Control Module Assembly Inspection»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) . If no concerns are found during the inspection, replace the control solenoid (w/body and TCM) valve assembly.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Control solenoid (w/body and TCM) valve assembly replacement. Refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for replacement, setup, and programming.
2. Perform the «Service Fast Learn Adapts»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__service-fast-learn-adapts) .

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

DTC P0965, P0966 or P0967

Clutch PC Solenoid 2

The clutch pressure control (PC) solenoid 2 is part of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. The transmission control module (TCM) supplies 12 volts to the clutch PC solenoid 2 on the high side driver 2 circuit. The TCM control the PC solenoid 2 through the clutch PC solenoid 2 control circuit. The normally high clutch PC solenoid 2 flows fluid to the 3-5-R clutch when commanded OFF and exhausts fluid when commanded ON. The clutch PC 2 regulates the transmission fluid pressure to the 3-5-R clutch.

1. The engine run time is greater than 5 seconds.
2. The clutch PC solenoid 2 is commanded ON.

P0965

The TCM detects an internal electrical performance malfunction of the clutch PC solenoid control circuit and the actual 3-5-R clutch pressure does not equal the commanded 3-5-R clutch pressure for 300 milliseconds.

P0966

The TCM detects an internal low voltage electrical malfunction of the clutch PC solenoid control circuit for 300 milliseconds.

P0967

The TCM detects an internal high voltage electrical malfunction of the clutch PC solenoid control circuit for 300 milliseconds.

1. DTCs P0965, P0966, and P0967 are Type A DTCs. Refer to «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) and «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype) .
2. The TCM defaults the transmission to a limited shift pattern utilizing 2 forward gears and reverse based on the fault detected.
3. The TCM commands maximum line pressure.
4. The TCM freezes transmission adaptive functions.

DTCs P0965, P0966, and P0967 are Type A DTCs. Refer to Diagnostic Trouble Code (DTC) Type Definitions and Diagnostic Trouble Code (DTC) List/Type .

When attempting to set DTCs, it may be helpful to ensure the TCM is warmed up and the transmission is operated in second gear long enough to ensure a 3°C (5°F) increase in TCM temperature. This will place the TCM under the optimal conditions to test DTCs.

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

Scan Tool Reference

1. «Scan Tool Data List»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__scan-tool-data-list)
2. «Scan Tool Data Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Scan Tool Output Controls»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__scan-tool-output-controls)

Perform the following procedure to place the control solenoid (w/body and TCM) valve assembly under the optimal conditions to test solenoid electrical DTCs.

1. Ensure the transmission fluid temperature is between 50-80°C (122-176°F).
2. Operate the vehicle in second gear long enough to ensure at least a 3°C (5°F) rise in TCM substrate temperature and then operate the vehicle in third gear for 5 seconds.

The scan tool data parameter Clutch PC 2 Sol. CKT Status normally displays OK.

If the parameter displays Open/Short to Volts, Short to GND or if the DTC resets, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection and if no concerns are found replace the control solenoid (w/body and TCM) valve assembly.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Replace the control solenoid (w/body and TCM) valve assembly. Refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for replacement, setup, and programming.
2. Perform the «Service Fast Learn Adapts»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__service-fast-learn-adapts) .

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

DTC P0969, P0970 or P0971

Clutch PC Solenoid 3

The clutch pressure control (PC) solenoid 3 is part of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. The TCM supplies 12 volts to the clutch PC solenoid 3 on the high side driver 2 circuit. The TCM control the clutch PC solenoid 3 through the clutch PC solenoid 3 control circuit. The normally high clutch PC solenoid 3 flows fluid to the low and reverse clutch and the 4-5-6 clutch. The clutch PC solenoid 3 regulates the transmission fluid pressure to the low and reverse clutch and 4-5-6 clutch assemblies.

1. The engine run time is greater than 5 seconds.
2. The clutch PC solenoid 3 is commanded ON.

P0969

The TCM detects an internal electrical performance malfunction of the clutch PC solenoid control circuit and the actual low and reverse/4-5-6 clutch pressure does not equal the commanded low and reverse/4-5-6 clutch pressure for 300 milliseconds.

P0970

The TCM detects an internal low voltage electrical malfunction of the clutch PC solenoid control circuit for 300 milliseconds.

P0971

The TCM detects an internal high voltage electrical malfunction of the clutch PC solenoid control circuit for 300 milliseconds.

1. DTCs P0969, P0970, and P0971 are Type A DTCs.
2. The TCM defaults the transmission to a limited shift pattern utilizing 2 forward gears and reverse based on the default detected.
3. The TCM commands maximum line pressure.
4. The TCM freezes transmission adaptive functions.

DTCs P0969, P0970, and P0971 are Type A DTCs.

When attempting to set DTCs, ensure the TCM is warmed up and the transmission is operated in second gear long enough to ensure a 3°C (5°F) increase in TCM substrate temperature. This will place the TCM under the optimal conditions to test DTCs.

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

Circuit Verification

Perform the following procedure to place the control solenoid (w/body and TCM) valve assembly under the optimal conditions to test solenoid electrical DTCs.

1. Ensure the transmission fluid temperature is between 50-80°C (122-176°F).
2. Operate the vehicle in second gear long enough to ensure at least a 3°C (5°F) rise in TCM substrate temperature and then operate the vehicle in fourth gear for 5 seconds.

The scan tool data parameter Clutch PC 3 Sol. CKT Status normally displays OK.

1. If the parameter displays Open/Short to Volts or Short to GND or if the DTC resets, perform the «Control Solenoid Valve and Transmission Control Module Assembly Inspection»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) and if no concerns are found, replace the control solenoid (w/body and TCM) valve assembly.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Replace the control solenoid (w/body and TCM) valve assembly. Refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for replacement, setup, and programming.
2. Perform the «Service Fast Learn Adapts»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__service-fast-learn-adapts) .

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

DTC P0973 or P0974

Shift Solenoid (SS) 1

The shift solenoid (SS) 1 is part of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. The control solenoid (w/body and TCM) valve assembly supplies 12 volts to SS 1 on the high side driver 2 circuit. The control solenoid (w/body and TCM) valve assembly controls the normally closed SS 1 on the SS 1 control circuit. The SS 1 controls the transmission fluid to the Mode-2 valve. In the OFF position no oil is supplied to the clutch pressure control (PC) solenoid 3 or the transmission fluid pressure (TFP) switch 5, and the 4-5-6 clutch is fed by drive fluid. In the ON position, Reverse fluid is allowed to flow and is supplied to the 3-5-R clutch.

1. The engine run time is greater than 5 seconds.
2. The SS 1 is commanded ON or OFF.

P0973

The control solenoid (w/body and TCM) valve assembly detects an internal low voltage electrical malfunction of the SS 1 control circuit when the SS 1 is commanded OFF for 300 milliseconds.

P0974

The control solenoid (w/body and TCM) valve assembly detects an internal high voltage electrical malfunction of the SS 1 control circuit when the SS 1 is commanded ON for 300 milliseconds.

1. DTCs P0973 and P0974 are Type A DTCs.
2. The TCM defaults the transmission to 3rd gear if the current gear is 1st, 2nd, or 3rd, or 5th gear if the current gear is 4th, 5th, or 6th gear.
3. The TCM inhibits the torque converter clutch (TCC).
4. The TCM commands maximum line pressure.
5. The TCM freezes transmission adaptive functions.

DTCs P0973 and P0974 are Type A DTCs.

When attempting to set solenoid electrical DTCs, ensure the control solenoid (w/body and TCM) valve assembly is warmed up and the transmission is operated in 2nd gear long enough to ensure a 3°C (5°F) increase in TCM temperature. This will place the TCM under the optimal conditions to test solenoid electrical DTCs.

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

Scan Tool Reference

1. «Scan Tool Output Controls»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__scan-tool-output-controls)
2. «Scan Tool Data List»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__scan-tool-data-list)
3. «Scan Tool Data Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

1. Ensure the transmission fluid temperature is between 50-80°C (122-176°F).
2. Operate the vehicle in 2nd gear long enough to ensure at least a 3°C (5°F) rise in TCM temperature.
3. Place the gear selector in Reverse for 5 seconds and then idle vehicle for 5 seconds.
4. Observe the scan tool data parameter Shift Sol. 1 CKT Status. The parameter should display OK. If the parameter displays Open, Short to Volts, Short to GND, or if the DTC resets, perform the «Control Solenoid Valve and Transmission Control Module Assembly Inspection»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) . If no concerns are found during the inspection, replace the control solenoid (w/body and TCM) valve assembly.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Perform the Service Fast Learn Adapts .

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

DTC P0976 or P0977

Shift Solenoid (SS) 2

Shift Solenoid (SS) 2

The shift solenoid (SS) 2 is part of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. The TCM supplies 12 volts to SS 2 on the high side driver 2 circuit. The TCM controls the normally closed SS 2 on the SS 2 control circuit. The SS 2 controls the transmission fluid to the Mode-3 valve. In the ON position the 4-5-6 clutch is fed by drive fluid. In the OFF position, Reverse fluid is allowed to flow and is supplied to the low and reverse clutch and the 4-5-6 clutch assemblies.

1. The engine run time is greater than 5 seconds.
2. The SS 2 is commanded ON or OFF.

P0976

The TCM detects an internal low voltage electrical malfunction of the SS 2 control circuit when the SS 2 is commanded OFF for 300 milliseconds.

P0977

The TCM detects an internal high voltage electrical malfunction of the SS 2 control circuit when the SS 2 is commanded ON for 300 milliseconds.

1. DTCs P0976 and P0977 are Type A DTCs.
2. The TCM defaults the transmission to 3rd gear if the current gear is 1st, 2nd, or 3rd, or 5th gear if the current gear is 4th, 5th, or 6th gear.
3. The TCM inhibits the torque converter clutch (TCC).
4. The TCM commands maximum line pressure.
5. The TCM freezes transmission adaptive functions.

DTCs P0976 and P0977 are Type A DTCs.

When attempting to set solenoid electrical DTCs, ensure the TCM is warmed up and the transmission is operated in 2nd gear long enough to ensure a 3°C (5°F) increase in TCM substrate temperature. This will place the TCM under the optimal conditions to test solenoid electrical DTCs.

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

Scan Tool Reference

1. «Scan Tool Output Controls»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__scan-tool-output-controls)
2. «Scan Tool Data List»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__scan-tool-data-list)
3. «Scan Tool Data Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

1. Ensure the transmission fluid temperature is between 50-80°C (122-176°F).
2. Operate the vehicle in 4th, 5th, or 6th gear with TCC applied, long enough to ensure at least a 3°C (5°F) rise in TCM substrate temperature.
3. Observe the scan tool data parameter Shift Sol. 2 CKT Status. The parameter should display OK. If the parameter displays Open, Short to Volts, Short to GND, or if the DTC resets, perform the «Control Solenoid Valve and Transmission Control Module Assembly Inspection»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) . If no concerns are found during the inspection, replace the control solenoid (w/body and TCM) valve assembly.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Control solenoid (w/body and TCM) valve assembly replacement. Refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for replacement, setup, and programming.
2. Perform the «Service Fast Learn Adapts»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__service-fast-learn-adapts) .

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

DTC P0989 or P0990

TFP Switches

The transmission fluid pressure (TFP) switch 5 is part of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. The TCM supplies 12 volts to the TFP switch 5 on the TFP switch 5 signal circuit; the TFP switch 5 has an internal case ground. TFP switch 5 is normally closed, Low. When oil pressure is present at the TFP switch 5, the switch is open, high. The normally low clutch pressure control (PC) solenoid 4 controls the transmission fluid to the 1-2-3-4 clutch. The TCM monitors the normally closed TFP switch 5 signal circuit to determine the 1-2-3-4 clutch status.

1. No DTCs P0120, P0711, P0712, or P0713.
2. No DTCs P0965, P0966, P0967, P0968, P0969, P0970, or P0971.
3. No DTCs P0973, P0974, P0976, P0977, P2719, P2720, P2728, P2729, or P2730.
4. No DTCs P1825 or P1915.
5. Ignition voltage is between 11-15 volts.
6. The transmission fluid temperature (TFT) is 20-150°C (68-302°F).

P0989

The TCM detects that the TFP Switch 5 signal voltage remains low, 0 volts when the low and reverse clutch or the 4-5-6 clutch is commanded ON for 5 seconds.

P0990

the TCM detects that the TFP Switch 5 signal voltage is high, 12 volts when the low and reverse clutch or the 4-5-6 clutch is commanded OFF.

1. DTCs P0989 and P0990 are Type C DTCs.
2. The TCM freezes transmission adaptive functions.

DTCs P0989 and P0990 are Type C DTCs.

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

If there are any other transmission related DTCs set, diagnose those DTCs first.

1. Ensure the TFT is near the temperature displayed in the Failure Records.
2. Start the engine and place the transmission range selector in D6.
3. Observe the TFP Switch 5 parameter while commanding 1st gear and then commanding 2nd gear with the scan tool. The TFP switch 5 should transition from low in 1st gear to high in 2nd gear. If the TFP Switch 5 parameter state does not change, perform the «Control Solenoid Valve and Transmission Control Module Assembly Inspection»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) . If no concerns are found, replace the control solenoid (w/body and TCM) valve assembly.

Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection .

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Control solenoid (w/body and TCM) valve assembly replacement. Refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for replacement, setup, and programming.
2. Perform the «Service Fast Learn Adapts»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__service-fast-learn-adapts) .

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The transmission control module (TCM) power up temperature sensor is located inside of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. The TCM power up temperature sensor provides the temperature of the TCM at TCM power up. This temperature reading is used in various shifting and diagnostic routines in the TCM software. This fault is handled inside the TCM and no external circuits are involved.

The engine speed is greater than 450 RPM.

P1684

1. No DTCs P0711, P0712, P0713, P0716, P0717, P0722, P0723, or P1684.
2. DTC P1684 has not passed this key ON.
3. The TCM power up temperature is between -39 and +149°C (-38 and +300°F).

P1685

1. No DTCs P0716, P0717, P0722, or P0723.
2. The transmission output shaft speed is greater than 200 RPM for greater than 200 seconds.
3. The torque converter clutch (TCC) slip speed is equal to or greater than 120 RPM for 200 seconds or greater.
4. DTC P1685 has not failed this ignition cycle.

P1685

DTC P1686 has not failed this ignition cycle.

P1684

Fail Case 1

1. Vehicle speed is greater than 8 km/h (5 mph) for 300 seconds cumulative.
2. TCC slip speed is greater than 120 RPM for 300 seconds cumulative.
3. The TCM power up temperature is between -40 and +21°C (-40 and +70°F).
4. The TCM power up temperature has changed by less than 2°C (3.6°F) in 100 seconds.
5. The transmission fluid temperature (TFT) is greater than 70°C (158°F).
6. The TFT has increased by 55°C (99°F) since startup.

Fail Case 2

1. Vehicle speed is greater than 8 km/h (5 mph) for 300 seconds cumulative.
2. TCC slip speed is greater than 120 RPM for 300 seconds cumulative.
3. The TCM temperature sensor is between 120-150°C (248-302°F).
4. The TCM power up temperature has changed by less than 2°C (3.6°F) in 100 seconds.
5. The TFT is greater than 70°C (158°F).
6. The TFT has increased by 55°C (99°F) since startup.

Fail Case 3

The TCM power up temperature changes by greater than or equal to 20°C (36°F) 14 times over 7 seconds.

The TCM power up temperature is less than or equal to -61°C (-77°F) for greater than 10 seconds.

P1686

The TCM power up temperature is greater than or equal to 161°C (321°F) for greater than 10 seconds.

1. DTCs P1684, P1685, and P1686 are Type C DTCs.
2. The TCM allows the vehicle to operate in transmission protection mode.

DTCs P1684, P1685, and P1686 are Type C DTCs.

Reprogram the TCM and retest the DTC to see if the DTC resets.

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

1. Clear the DTC and operate the vehicle under the Conditions for Running the DTC and the Conditions for Setting the DTC.
2. Shut the ignition OFF for 30 seconds, and then verify that the DTC does not reset. If the DTC resets, replace the control solenoid (w/body and TCM) valve assembly.

Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection .

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Control solenoid (w/body and TCM) valve assembly replacement. Refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for replacement, setup, and programming.
2. Perform the «Service Fast Learn Adapts»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__service-fast-learn-adapts) .

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The shift valve 1 (clutch select valve 2) is part of the lower control valve body. The shift valve 1 (clutch select valve 2) controls fluid to the R1 and 4-5-6 clutches. During this diagnostic test, intrusive actions are taken by the transmission control module (TCM) to test the clutch select valve 2 to see if the valve is stuck. The TCM commands the shift solenoid (SS) 1 ON to put pressure on the valve towards the spring and at the same time, elevates line pressure slightly to assist the spring side pressure. If the spring is broken, the valve will slip back towards the spring indicating a mechanical failure and the DTC will set.

1. No DTCs P0716 or P0717.
2. No DTCs P0722 or P0723.
3. No DTCs P2763, or P2764.
4. No DTCs P0741 or P0742.
5. The engine run time is greater than 5 seconds.
6. The transmission fluid temperature (TFT) is 20-130°C (68-266°F).
7. The calculated throttle position is between 8-90 percent.
8. The engine torque is greater than 50 N.m (36 lb ft).
9. No upshift or downshift in process.
10. DTC P0742 has not passed or failed for this torque converter clutch (TCC) cycle.
11. The attained gear slip is equal to or greater than 70 RPM.

The TCM detects attained gear slip greater than 75 RPM for 0.5 seconds.

DTC P1751 is a Type B DTC.

DTC P1751 is a Type B DTC.

When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to assist in duplicating the failure conditions. Ensure the transmission fluid level is correct and there are no leaks.

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

Operate the vehicle in drive with the calculated throttle position greater than 8 percent and ensure the TCC is commanded ON and OFF a minimum of 5 times.

1. If the DTC resets, go to Component Testing.

Inspect the lower control valve body for a stuck clutch select valve 2, a broken clutch select valve 2 spring, debris or damage.

1. If you found a valve body concern, repair or replace the lower control valve body as necessary.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Replace the control valve body. Refer to «Control Valve Lower Body and Upper Body Replacement»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) .
2. Perform the «Service Fast Learn Adapts»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__service-fast-learn-adapts) .

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

DTC P1825 or P1915

IMS A/B/C/P

The internal mode switch (IMS) assembly is a sliding contact switch attached to the control valve body within the transmission. The 4 inputs to the transmission control module (TCM) from the switch indicate which position is selected by the transmission manual shaft. The input voltage at the TCM is high when the switch is open and low when the switch is closed to ground. The state of each input is displayed on the scan tool as IMS. The IMS input parameters represented are transmission range signal A, Signal B, signal C, and signal P.

No OSS DTCs P0722 or P0723.

P1825

Vehicle speed sensor (VSS) is greater than 16 km/h (10 mph)

P1915

The transmission output shaft speed is less than 90 RPM.

Any one or more of the following conditions

1. The IMS signal circuit A, B, or P are Low in Park for greater than 1 second.
2. The IMS signal circuit A is Low in D6 for 8 seconds.
3. The IMS signal circuit C is High in D6 for 8 seconds.
4. The TCM detects an invalid range from the IMS for 3.25 seconds.
5. The IMS signal circuit C is high in D6 for greater than 8 seconds and the engine torque is greater than 20 N.m (15 lb ft).
6. Park/Neutral Switch equals P/N and the IMS state is not Park or Neutral, or the Park/Neutral switch is not Park or Neutral and the IMS state equals Park or Neutral for 4 seconds.

The manual shift shaft switch assembly indicates a transitional state during the following sequence

1. The engine speed is less than 50 RPM for more than 0.25 seconds.
2. The engine speed is 50-480 RPM for more than 0.07 seconds.
3. The engine speed is greater than 525 RPM for more than 3.25 seconds.
4. The transmission input shaft speed is greater than 250 RPM.

1. DTCs P1825 and P1915 are Type A DTCs.
2. The TCM commands maximum line pressure.
3. The TCM turns OFF all solenoids.
4. The TCM freezes transmission adaptive functions.
5. The TCM defaults the transmission to third gear if the current gear is 1st, 2nd, or 3rd; or fifth gear if the current gear is 4th, 5th, or 6th gear.

DTCs P1825 and P1915 are Type A DTCs.

1. The IMS is part of a wire harness, which connects electrically to the control solenoid (w/body and TCM) valve assembly and is serviced separately from the control solenoid (w/body and TCM) valve assembly. Inspect the IMS, harness, connector, and control solenoid (w/body and TCM) valve assembly pins for metallic debris. Use the J 35616 GM-approved terminal test kit for any test that requires probing the control solenoid (w/body and TCM) valve assembly harness connector or a component harness connector. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__special-tools) .
2. Inspect for a incorrectly adjusted range selector lever cable. Refer to «Range Selector Lever Cable Adjustment»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__range-selector-lever-cable-adjustment) .
3. Inspect the manual shaft detent assembly for proper alignment with the manual shaft detent lever. The manual shaft detent roller must be centered over the detent lever and not contact the IMS actuator arm.

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

Scan Tool Reference

1. «Scan Tool Output Controls»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__scan-tool-output-controls)
2. «Scan Tool Data List»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__scan-tool-data-list)
3. «Scan Tool Data Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

Special Tools Required

J 35616 GM-Approved Terminal Test Kit. See Special Tools .

Test for the correct operation of the IMS. Refer to Transmission Internal Mode Switch Logic .

1. If the IMS operation matches the IMS logic table, the system is functioning normally.

1. Disconnect the IMS connector at the control solenoid (w/body and TCM) valve assembly. Ignition ON. The scan tool IMS A/B/C/P parameter should display HI for all four signal circuits. If a signal circuit displays LOW, the control solenoid (w/body and TCM) valve assembly is faulty.
2. Connect a 3-amp fused jumper wire between each transmission range signal circuit at the control solenoid (w/body and TCM) valve assembly and ground ensuring that the signal circuit displays LOW when connected to ground. If a signal circuit remains HI when connected to ground, the control solenoid (w/body and TCM) valve assembly is faulty. If the above two tests indicate correct TCM functions, the IMS is faulty.

Internal Mode Switch (IMS) Logic Table

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Internal Mode Switch (IMS) Replacement. Refer to «Manual Shift Shaft Position Switch Replacement»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) .
2. Control Solenoid (w/Body and TCM) Valve Assembly Replacement. Refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for replacement, setup, and programming.
3. Perform the «Service Fast Learn Adapts»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__service-fast-learn-adapts) .

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The transmission control module (TCM) high side driver 2 is located inside of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. The high side driver 2 provides the voltage for the TCM pressure control solenoids and shift solenoids. This fault is handled inside the TCM and no external circuits are involved.

P1831

1. The engine speed is greater than 500 RPM.
2. Ignition voltage is between 8-18 volts.
3. High side driver 2 is enabled.
4. DTC P1831 has not failed this ignition.

P1832

DTC P1832 has not failed this ignition.

P1831

The TCM detects an internal open or short to ground in the high side driver 2 for 3 out of 5 seconds.

The TCM detects an internal short to voltage on the high side driver 2 circuit for 3 out of 5 seconds.

P1831

1. DTC P1831 is a Type A DTC.
2. The TCM turns OFF all high side drivers.
3. The TCM turns OFF all solenoids.
4. The TCM commands maximum line pressure.
5. the TCM freezes transmission adaptive functions.
6. The TCM commands the TCC OFF.
7. The TCM allows the vehicle to operate in transmission protection mode.

DTC P1832 is a Type C DTC.

1. DTC P1831 is a Type A DTC.
2. DTC P1832 is a Type C DTC.

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

1. Clear the DTC and operate the vehicle under the conditions for running and setting the DTC.
2. Observe the High Side Driver CKT Status parameter. The parameter should display OK. If the parameter displays Open, Short to Ground, Short to Voltage, or the DTC resets, replace the control solenoid (w/body and TCM) valve assembly. Refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for replacement, setup, and programming.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Control solenoid (w/body and TCM) valve assembly replacement. Refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for replacement, setup, and programming.
2. Perform the «Service Fast Learn Adapts»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__service-fast-learn-adapts) .

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The transmission control module (TCM) samples the system voltage on the Ignition 1 voltage circuit every 0.1 seconds. Lower than normal voltage may be inadequate to operate the transmission control solenoids properly. Improper solenoid operation may cause erratic transmission operation, which may result in internal damage.

1. The engine speed is greater than 500 RPM.
2. Ignition voltage is between 8-18 volts.

The TCM detects 2 volts or less on the ignition 1 voltage circuit at the TCM for 10 seconds or more.

1. DTC P2534 is a Type A DTC.
2. The TCM turns OFF all high side drivers.
3. The TCM turns OFF all solenoids.
4. The TCM commands maximum line pressure.
5. the TCM freezes transmission adaptive functions.
6. The TCM commands the TCC OFF.
7. The TCM allows the vehicle to operate in transmission protection mode.

DTC P2534 is a Type A DTC.

1. If all circuit tests are OK, ensure the transmission pass through connector and harness terminals are clean and not damaged, and the charging system is functioning correctly.
2. Verify there is a good connection at the body control module (BCM) especially if DTC P0700 is also set with this code.

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

Clear the DTC and operate the vehicle under the conditions for running and setting the DTC.

1. If the DTC resets, test the TCM ignition 1 voltage circuit for battery positive voltage at the TCM 16-way connector.
2. If the voltage is less than battery voltage, test the Ignition 1 voltage circuit for an open or short to ground and repair the circuit as necessary.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Perform the Service Fast Learn Adapts .

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

The clutch pressure control (PC) solenoid 4 is part of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. The clutch PC solenoid 4 flows fluid to the 2-6 clutch when commanded ON and exhausts fluid when commanded OFF. The clutch PC solenoid 4 regulates the transmission fluid pressure to the 2-6 clutch. The TCM calculates gear ratio based on data from the automatic transmission input speed sensor (ISS) and the output speed sensor (OSS). The TCM compares the known transmission gear ratio to a calculated gear ratio for each commanded gear.

1. No DTCs P0716 or P0717.
2. No DTCs P0722 or P0723.
3. No DTCs P1825 or P1915.

DTC P2714

1. The transmission input shaft speed is greater than 60 RPM.
2. 2-6 clutch is commanded ON.

DTC P2715

1. The transmission output shaft speed is greater than 200 RPM.
2. 2-6 clutch is commanded OFF.

DTC P2714

The TCM detects an incorrect on-coming clutch gear ratio, or flare, when the 2-6 clutch is commanded ON for 0.5 seconds and the transmission input shaft speed is greater than 75 RPM from the anticipated input shaft speed.

DTC P2715

The TCM detects an incorrect off-going clutch gear ratio, or tie-up, when the 2-6 clutch is commanded OFF for 0.2 seconds and the transmission input shaft speed is less than 40 RPM from the anticipated input shaft speed.

1. DTCs P2714 and P2715 are Type A DTCs.
2. The TCM commands maximum line pressure.
3. The TCM inhibits TCC.
4. The TCM freezes transmission adaptive functions.

DTCs P2714 and P2715 are Type A DTCs.

When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to assist in duplicating the failure conditions.

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

Scan Tool Reference

1. «Scan Tool Output Controls»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__scan-tool-output-controls)
2. «Scan Tool Data List»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__scan-tool-data-list)
3. «Scan Tool Data Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

Special Tools Required

1. DT-47825 Control Solenoid Test Plate. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__special-tools) .
2. DT-47825-10 Jumper Harness. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__special-tools) .

1. Perform the «Transmission Fluid Check»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__transmission-fluid-check) .
2. Turn ON the ignition, with the engine OFF.
3. Record the DTC Freeze Frame and Failure Records.
4. Clear the DTC.
5. Operate the vehicle in drive with the calculated throttle position greater than 15% to obtain 72 km/h (45 mph) and achieve 5th gear. Perform this maneuver 2 times. If the DTC resets, go to Circuit/System Testing.

1. Perform the «Line Pressure Check»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) . If the pressure is out of specification, correct this concern first.
2. Perform the «Control Solenoid Valve and Transmission Control Module Assembly Cleaning»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__control-solenoid-valve-and-transmission-control) and retest the DTC as outlined in the Circuit/System Verification steps. If the DTC resets, continue on with testing.
3. Perform the «Control Solenoid Valve and Transmission Control Module Assembly Inspection»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) . If a concern is found, repair or replace the control solenoid (w/body and TCM) valve assembly.
4. Perform the «Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__control-solenoid-valve-and-transmission-control) . If the solenoid is found to be leaking or stuck closed, replace the control solenoid (w/body and TCM) valve assembly.
5. Inspect the control valve upper body assembly for sticking valves, damage, scored bores, or debris. If a concern if found in the valve body, repair or replace the valve body as necessary.
6. Inspect the 2-6 clutch assembly for damage. If a concern is found in the 2-6 clutch assembly, repair or replace as necessary.

Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection .

PC Sol 4 Operation

1. Perform the «Diagnostic Repair Verification»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-repair-verification) after completing the diagnostic procedure. Control valve body replacement. Refer to «Control Valve Lower Body and Upper Body Replacement»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) .
2. 2-6 clutch assembly repair or replace. Refer to 2-6 Clutch Overhaul (6L80) in the Transmission Unit Repair Manual.
3. Control solenoid (w/body and TCM) valve assembly replacement. Refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for replacement, setup, and programming.
4. Perform the «Service Fast Learn Adapts»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__service-fast-learn-adapts) .

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

DTC P2719, P2720 or P2721

Clutch PC Solenoid 4 Scan Tool Data

The clutch pressure control (PC) solenoid 4 is part of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. The TCM supplies 12 volts to the clutch PC solenoid 4 through the high side driver 2 circuit. The TCM control the clutch PC solenoid 4 through the clutch PC solenoid 4 control circuit. The normally low clutch PC solenoid 4 flows fluid to the 2-6 clutch when commanded ON and exhausts fluid when commanded OFF. The clutch PC solenoid 4 regulates the transmission fluid pressure to the 2-6 clutch.

1. The engine run time is greater than 5 seconds.
2. The clutch PC solenoid 4 is commanded ON or OFF.

P2719

The TCM detects an internal electrical performance malfunction of the clutch PC solenoid 4 control circuit and the actual 2-6 clutch pressure does not equal the commanded 2-6 clutch pressure for 300 milliseconds.

P2720

The TCM detects an internal low voltage electrical malfunction of the clutch PC solenoid 4 control circuit for 300 milliseconds.

P2721

The TCM detects an internal high voltage electrical malfunction of the clutch PC solenoid 4 control circuit for 300 milliseconds.

1. DTCs P2719, P2720, and P2721 are Type A DTCs.
2. The TCM defaults the transmission to a limited shift pattern utilizing 2 forward gears and reverse based on the default detected.
3. The TCM commands maximum line pressure.
4. The TCM freezes transmission adaptive functions.

DTCs P2719, P2720, and P2721 are Type A DTCs.

When attempting to set DTCs, ensure the TCM is warmed up and the transmission is operated in second gear long enough to ensure a 3°C (5°F) increase in TCM substrate temperature. This will place the TCM under the optimal conditions to test DTCs.

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

Perform the following procedure to place the control solenoid (w/body and TCM) valve assembly under the optimal conditions to test solenoid electrical DTCs.

1. Ensure the transmission fluid temperature is between 50-80°C (122-176°F).
2. Operate the vehicle in second gear long enough to ensure at least a 3°C (5°F) rise in TCM substrate temperature.

The scan tool data parameter Clutch PC 4 Sol. CKT Status normally displays OK.

1. If the parameter displays Open/Short to Volts or Short to GND or if the DTC resets, perform the «Control Solenoid Valve and Transmission Control Module Assembly Inspection»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) and if no concerns are found, replace the control solenoid (w/body and TCM) valve assembly.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Replace the control solenoid (w/body and TCM) valve assembly. Refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for replacement, setup, and programming.
2. Perform the «Service Fast Learn Adapts»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__service-fast-learn-adapts) .

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

The clutch pressure control (PC) solenoid 5 is part of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. The clutch PC solenoid 5 flows fluid to the 1-2-3-4 clutch when commanded ON and exhausts fluid when commanded OFF. The clutch PC solenoid 5 regulates the transmission fluid pressure to the 1-2-3-4 clutch. The TCM calculates gear ratio based on data from the automatic transmission input speed sensor (ISS) and the output speed sensor (OSS). The TCM compares the known transmission gear ratio to a calculated gear ratio for each commanded gear.

1. No DTCs P0716 or P0717.
2. No DTCs P0722 or P0723.
3. No DTCs P1825 or P1915.

DTC P2723

1. The transmission input shaft speed is greater than 60 RPM.
2. 1-2-3-4 clutch is commanded ON.

DTC P2724

1. The transmission output shaft speed is greater than 200 RPM.
2. 1-2-3-4 clutch is commanded OFF.

DTC P2723

The TCM detects an incorrect on-coming clutch gear ratio, or flare, when the 1-2-3-4 clutch is commanded ON for 0.5 seconds and either fail case below is achieved

Fail Case 1

1. Output shaft speed is greater than 60 RPM.
2. The transmission input shaft speed is greater than 75 RPM from the anticipated input shaft speed.

Fail Case 2

1. Output shaft speed is less than 60 RPM.
2. The transmission input shaft speed is greater than 75 RPM from the anticipated input shaft speed.

DTC P2724

The TCM detects an incorrect off-going clutch gear ratio, or tie-up, when the 1-2-3-4 clutch is commanded OFF for 0.2 seconds and the following is achieved

1. The 1-2-3-4 clutch commanded pressure is 0 kPa for a calculated amount of time.
2. The transmission input shaft speed is less than 40 RPM from the anticipated input shaft speed.
3. The output shaft speed is greater than 60 RPM.

1. DTCs P2723 and P2724 are Type A DTCs.
2. The TCM freezes transmission adaptive functions.
3. DTC P2723 defaults to Reverse, Park, Neutral, 5th, or 6th gear.
4. DTC P2724 defaults to Reverse, Park, Neutral, 1st, or 2nd gear.

DTCs P2723 and P2724 are Type A DTCs.

When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to assist in duplicating the failure conditions.

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

Scan Tool Reference

1. «Scan Tool Output Controls»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__scan-tool-output-controls)
2. «Scan Tool Data List»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__scan-tool-data-list)
3. «Scan Tool Data Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

Special Tools Required

1. DT-47825 Control Solenoid Test Plate. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__special-tools) .
2. DT-47825-10 Jumper Harness. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__special-tools) .

1. Perform the «Transmission Fluid Check»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__transmission-fluid-check) .
2. Turn ON the ignition, with the engine OFF.
3. Record the DTC Freeze Frame and Failure Records.
4. Clear the DTC.
5. Operate the vehicle in drive with the calculated throttle position greater than 15 percent to obtain 72 km/h (45 mph) and achieve 5th gear. Perform this maneuver 2 times. If the DTC resets, go to Circuit/System Testing.

1. Perform the «Line Pressure Check»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) . If the pressure is out of specification, correct this concern first.
2. Perform the «Control Solenoid Valve and Transmission Control Module Assembly Cleaning»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__control-solenoid-valve-and-transmission-control) and retest the DTC as outlined in the Circuit/System Verification steps. If the DTC resets, continue on with testing.
3. Perform the «Control Solenoid Valve and Transmission Control Module Assembly Inspection»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) . If a concern is found, repair or replace the control solenoid (w/body and TCM) valve assembly.
4. Perform the «Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__control-solenoid-valve-and-transmission-control) . If the solenoid is found to be leaking or stuck closed, replace the control solenoid (w/body and TCM) valve assembly.
5. Inspect the control valve upper body assembly for sticking valves, damage, scored bores, or debris. If a concern if found in the valve body, repair or replace the valve body as necessary.
6. Inspect the 1-2-3-4 clutch assembly for damage. If a concern is found in the 1-2-3-4 clutch assembly, repair or replace as necessary.

Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection .

PC Sol 5 Operation

1. Perform the «Diagnostic Repair Verification»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-repair-verification) after completing the diagnostic procedure. Control valve body replacement. Refer to «Control Valve Lower Body and Upper Body Replacement»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) .
2. Control solenoid (w/body and TCM) valve assembly replacement. Refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for replacement, setup, and programming.
3. 1-2-3-4 clutch assembly repair or replace. Refer to 1-2-3-4 and 3-5 Reverse Clutch Overhaul in the Transmission Unit Repair Manual.
4. Perform the «Service Fast Learn Adapts»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__service-fast-learn-adapts) .

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

DTC P2728, P2729 or P2730

Clutch PC Solenoid 5

The clutch pressure control (PC) solenoid 5 is part of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. The TCM supplies 12 volts to the clutch PC solenoid 5 through the high side driver 2 circuit. The TCM control the clutch PC solenoid 5 through the clutch PC solenoid 5 control circuit. The normally low clutch PC solenoid 5 flows fluid to the 1-2-3-4 clutch when commanded ON and exhausts fluid when commanded OFF. The clutch PC solenoid 5 regulates the transmission fluid pressure to the 1-2-3-4 clutch.

1. The engine run time is greater than 5 seconds.
2. The clutch PC solenoid 5 is commanded ON or OFF.

P2728

The TCM detects an internal electrical performance malfunction of the clutch PC solenoid 5 control circuit and the actual 1-2-3-4 clutch pressure does not equal the commanded 1-2-3-4 clutch pressure for 5 seconds.

P2729

The TCM detects an internal low voltage electrical malfunction of the clutch PC solenoid 5 control circuit for 300 milliseconds.

P2730

The TCM detects an internal high voltage electrical malfunction of the clutch PC solenoid 5 control circuit for 300 milliseconds.

1. DTCs P2728, P2729, and P2730 are Type A DTCs.
2. The TCM defaults the transmission to a limited shift pattern utilizing 2 forward gears and reverse based on the default detected.
3. The TCM commands maximum line pressure.
4. The TCM freezes transmission adaptive functions.

DTCs P2728, P2729, and P2730 are Type A DTCs.

When attempting to set DTCs, ensure the TCM is warmed up and the transmission is operated in second gear long enough to ensure a 3°C (5°F) increase in TCM substrate temperature. This will place the TCM under the optimal conditions to test DTCs.

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

Perform the following procedure to place the control solenoid (w/body and TCM) valve assembly under the optimal conditions to test solenoid electrical DTCs.

1. Ensure the transmission fluid temperature is between 50-80°C (122-176°F).
2. Operate the vehicle in second gear long enough to ensure at least a 3°C (5°F) rise in TCM substrate temperature.

The scan tool data parameter Clutch PC 5 Sol. CKT Status normally displays OK.

1. If the parameter displays Open/Short to Volts or Short to GND or if the DTC resets, perform the «Control Solenoid Valve and Transmission Control Module Assembly Inspection»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) and if no concerns are found, replace the control solenoid (w/body and TCM) valve assembly.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Replace the control solenoid (w/body and TCM) valve assembly. Refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for replacement, setup, and programming.
2. Perform the «Service Fast Learn Adapts»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__service-fast-learn-adapts) .

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

DTC P2762, P2763, or P2764

TCC PC Solenoid

The torque converter clutch (TCC) pressure control solenoid is part of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. The TCM supplies 12 volts to the TCC pressure control solenoid through the high side driver 2 circuit. The TCM controls the TCC solenoid through the TCC solenoid control circuit. The normally low TCC pressure control solenoid flows fluid to the TCC when commanded ON and exhausts fluid when commanded OFF. The TCC solenoid regulates the transmission fluid pressure to the TCC.

1. No DTCs P1833 or P1834.
2. The engine run time is greater than 5 seconds.
3. The TCC pressure control solenoid is commanded ON.

P2762

The TCM detects an internal electrical performance malfunction of the TCC pressure control solenoid circuit and the actual TCC pressure does not equal the commanded TCC pressure for 300 milliseconds.

P2763

The TCM detects an internal low voltage electrical malfunction of the TCC pressure control solenoid control circuit for 300 milliseconds.

P2764

The TCM detects an internal high voltage electrical malfunction of the TCC pressure control solenoid control circuit for 300 milliseconds.

1. DTC P2762 is a Type C DTC.
2. DTCs P2763 and P2764 are Type B DTCs.
3. The TCM inhibits 6th gear in Hot Mode.
4. The TCM inhibits TCC.
5. The TCM commands maximum line pressure.
6. The TCM freezes transmission adaptive functions.

1. DTC P2762 is a Type C DTC.
2. DTCs P2763 and P2764 are Type B DTCs.

When attempting to set DTCs, ensure the TCM is warmed up and the transmission is operated in 2nd gear long enough to ensure a 3°C (5°F) increase in TCM substrate temperature. This will place the TCM under the optimal conditions to test DTCs.

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

1. «Automatic Transmission Inline 16-Way Connector End View»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Automatic Transmission Internal Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
3. «Automatic Transmission Related Connector End Views»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

DTC Type Reference

1. «Diagnostic Trouble Code (DTC) Type Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. «Diagnostic Trouble Code (DTC) List/Type»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__diagnostic-trouble-code-dtc-listtype)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

Scan Tool Reference

1. «Scan Tool Output Controls»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__scan-tool-output-controls)
2. «Scan Tool Data List»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__scan-tool-data-list)
3. «Scan Tool Data Definitions»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

1. Ensure the transmission fluid temperature is between 50-80°C (122-176°F).
2. Operate the vehicle in 2nd gear long enough to ensure at least a 3°C (5°F) rise in TCM temperature, then operate the vehicle to ensure TCC engagement for 5 seconds.
3. Observe the scan tool data parameter TCC PC Sol. CKT Status, the parameter should display OK. If the parameter displays Open, Short to Volts, Short to GND or if the DTC resets, perform the «Control Solenoid Valve and Transmission Control Module Assembly Inspection»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) . If no concerns are found during the inspection, replace the control solenoid (w/body and TCM) valve assembly.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Control solenoid (w/body and TCM) valve assembly replacement. Refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for replacement, setup, and programming.
2. Perform the «Service Fast Learn Adapts»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__service-fast-learn-adapts) .

Symptoms - Automatic Transmission

Visual/Physical Inspection

Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

1. Fluid Diagnosis «Transmission Fluid Check»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__transmission-fluid-check) «Fluid Pressure High or Low»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__fluid-pressure-high-or-low) «Automatic Transmission Fluid Leaks»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__automatic-transmission-fluid-leaks) «Fluid Leak Diagnosis»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)
2. Noise and Vibration Diagnosis «Whine/Growl Noise That Changes with Vehicle Speed»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__whinegrowl-noise-that-changes-with-vehicle) «Noise in First or Reverse Gear»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__noise-in-first-or-reverse-gear) «Noise in First, Second, Third, Fourth, Fifth, or Reverse Gear»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__noise-in-first-second-third-fourth) «Noise in First, Second, Sixth, or Reverse Gear»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__noise-in-first-second-sixth-or) «Noise in Second or Sixth Gear»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__noise-in-second-or-sixth-gear) «Noise During 3-4 or 4-3 Shifts»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__noise-during-3-4-or-4-3-shifts) «Noise in Fourth, Fifth, or Sixth Gear»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__noise-in-fourth-fifth-or-sixth) «Vibration»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__vibration) «Vibration in Second, Third, Fourth, Fifth, or Sixth Gear»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__vibration-in-second-third-fourth-fifth) «Flexplate/Torque Converter Vibration Test»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) «Noise and Vibration Analysis»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#how-to-diagnosis-troubleshooting-the-automatic-transmission-5l40-e5l50-e-service__noise-and-vibration-analysis)
3. Range Performance Diagnosis «No Park or Drive»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__no-park-or-drive) «No Drive in All Ranges»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__no-drive-in-all-ranges) «No Reverse Gear»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__no-reverse-gear) «No Drive or Reverse Gear»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__no-drive-or-reverse-gear)
4. Shift Quality Feel Diagnosis «Harsh Garage Shift»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__harsh-garage-shift) «Harsh, Soft, Delayed or Slipping First or Reverse Gear»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__harsh-soft-delayed-or-slipping-first) «Harsh, Soft, Delayed or Slipping 1-2-3-4 Shift»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__harsh-soft-delayed-or-slipping-1-2-3-4) «Harsh, Soft, Delayed or Slipping 4-5-6 Shift»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__harsh-soft-delayed-or-slipping-4-5-6) «Harsh, Soft, Delayed or Slipping Third, Fifth, or Reverse Gear»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__harsh-soft-delayed-or-slipping-third) «Harsh, Soft, Delayed or Slipping Second or Sixth Gear»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__harsh-soft-delayed-or-slipping-second)
5. Shift Pattern «No First Gear»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__no-first-gear) «No First and Reverse Gears»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__no-first-and-reverse-gears) «No First, Second, Third, and Fourth Gear»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__no-first-second-third-and-fourth) «No First, Second, Third, Fourth, Fifth, or Reverse Gear»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__no-first-second-third-fourth-fifth) «No Second and Sixth Gear»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__no-second-and-sixth-gear) «No First, Second, Sixth, or Reverse Gear»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__no-first-second-sixth-or-reverse) «No Fourth, Fifth, and Sixth Gear»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__no-fourth-fifth-and-sixth-gear) «No Third, Fifth, and Reverse Gear»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__no-third-fifth-and-reverse-gear) «Stuck in Second or Sixth Gear»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__stuck-in-second-or-sixth-gear) «Stuck in First or Reverse Gear»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__stuck-in-first-or-reverse-gear)
6. Torque Converter Diagnosis «Torque Converter Diagnosis»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__torque-converter-diagnosis) «No Torque Converter Clutch Apply»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__no-torque-converter-clutch-apply) «No Torque Converter Clutch Release»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__no-torque-converter-clutch-release)
7. Symptom Not Found or No Symptom Detected «Transmission Fluid Check»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__transmission-fluid-check) «Road Test»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__road-test) «Line Pressure Check»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e)

Scheme 81

1. Inspect the control solenoid (w/body and TCM) valve assembly connectors and pins (2, 3, 4) for the following conditions: Damage Bent pins Debris Broken retaining tab Contamination
2. Ensure no metallic debris is inside the connectors near the terminal pins.
3. Inspect the control solenoid (w/body and TCM) valve assembly solenoid leads (1) for contamination or metallic debris.
4. Inspect the 4 control solenoid (w/body and TCM) valve assembly filter plate retaining tabs (5) for cracks and ensure proper tension when filter plate is attached.

Control Solenoid Valve and Transmission Control Module Assembly Input Shaft Speed/Output Shaft Speed Input Test

Tools Required

1. J 35616 GM-Approved Terminal Test Kit. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__special-tools) .
2. J 38522 Variable Signal Generator

Scheme 82

The purpose of this test is to provide a simulated input/output speed sensor (ISS/OSS) signal to the control solenoid (w/body and TCM) valve assembly ISS/OSS input circuits.

1. Disconnect the ISS/OSS wiring harness connector from the control solenoid (w/body and TCM) valve assembly.
2. Using the J 35616 , connect the J 38522 to the affected ISS or OSS signal circuit on the control solenoid (w/body and TCM) valve assembly. Set the J 38522 Signal to 8 volts, the Frequency to 120 and the Percent Duty Cycle to 50. Ignition On, observe either the scan tool parameter ISS Signal or OSS Signal. The signal parameter should display between 100-400 RPM.

1. If the signal display is not in this range, the control solenoid (w/body and TCM) valve assembly is not reading the input signal correctly and is faulty.

Control Solenoid Valve and Transmission Control Module Assembly Cleaning

The control solenoid (w/body and TCM) valve assembly cleaning procedure is a specific software based routine, which resides in the TCM. This procedure is activated by the scan tool and is used to cycle the solenoids and valves in the control solenoid valve assembly in an attempt to dislodge debris and free up the valves after a performance diagnostic trouble code (DTC) has set. When the cleaning procedure is completed, the DTC enable criteria is run again, and retested to see if the DTC concern has been corrected.

1. Operate the transmission to achieve 70°-90°C (158°-194°F).
2. With a scan tool, select the Service Cleaning Procedure. Initiate the cleaning procedure.
3. When the cleaning procedure is completed, shut OFF the ignition for 30 seconds.

Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test

Tools Required

DT-47825 Control Solenoid Test Plate. See Special Tools .

The purpose of this procedure is to test the operation of the control solenoid (w/body and TCM) valve assembly for a stuck open or stuck closed solenoid. The DT-47825 bolts to the mounting surface of the control solenoid (w/body and TCM) valve assembly. See Special Tools . Compressed air is attached to the test block, through the control solenoid (w/body and TCM) valve assembly solenoid passage and back to a pressure gage on the test plate, sent through the control solenoid (w/body and TCM) valve assembly solenoid, and back to the test plate pressure port.

An air pressure gage is used to display the air passing through the solenoid. If the solenoid is unable to allow air through or the air is constantly flowing through the solenoid may be stuck. The scan tool is used to command the solenoids On and Off while watching the air pressure test gage to determine if the solenoid is functioning correctly. The recommended shop air pressure for this test is 620.5-689.4 kPa (90-100 psi).

Scheme 83

The TCM will normally cycle some of the transmission solenoids On and Off to keep the solenoid passages clean and clear, This is a normal function and will cause the valves to cycle open and closed quickly when the TCM is powered up. This will make the pressure gage needle flicker or move from high and low as the valves open and close, allowing air to exit the ports where the pressure gage is not connected.

It is necessary to drain the control solenoid (w/body and TCM) valve assembly of all remaining transmission fluid before attaching the test plate. Use caution when attaching air to the test plate, as any remaining transmission fluid in the control solenoid (w/body and TCM) valve assembly will be forced out. Use shop towels to cover the test plate ports in order to prevent fluid from being released into the air.

Preliminary Procedures

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/xlr/i-2003-2009/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
2. Remove the transmission fluid pan and filter. Refer to «Automatic Transmission Fluid, Fluid Pan and/or Filter Replacement»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) .
3. Remove the transmission electrical connector. Refer to «Automatic Transmission Electrical Connector Passage Sleeve Replacement»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) .
4. Remove the control solenoid (w/body and TCM) valve assembly from the transmission. Refer to «Control Valve Lower Body and Upper Body Replacement»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) .

Scheme 84

1. Align and install the electrical connector sleeve to the control solenoid (w/body and TCM) valve assembly and secure with the connector slide lock.
2. If necessary, clean each side of the filter plate assembly and install the filter plate assembly back on the control solenoid (w/body and TCM) valve assembly. Clean the mounting surface of the DT-47825 . See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__special-tools) .
3. Bolt the DT-47825 to the control solenoid (w/body and TCM) valve assembly mounting surface. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__special-tools) . Use the bolts and washers supplied with the tool to attach the test block. Tighten the bolts to 5 N.m (44 lb in).
4. Connect the test harness supplied with the DT-47825 to the vehicle harness and to the TCM. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__special-tools) . Engage the connector locks.
5. Connect shop air to the DT-47825 air inlet. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__special-tools) . Do not exceed the recommended air pressure of 620.5-689.4 kPa (90-100 psi).
6. With the ignition ON and the scan tool communicating with the vehicle, command the solenoid in question On and Off. Watch the air pressure gage for a change as you command the solenoid. Refer to Control Solenoid (w/Body and TCM) Valve Assembly Solenoid Performance Test Plate to Component Identification for correct solenoid function and test plate port connections for the solenoid being tested.
7. The solenoid should allow air pressure to flow or prevent air pressure flow depending on the solenoid state. The test results are read on the pressure gage.
8. Command the solenoid valve On and Off several times to determine the condition of the solenoid in question. Release the test air pressure from the pressure the gage between solenoid tests.

Control Solenoid (w/Body and TCM) Valve Assembly Solenoid Performance Test Block to Component Identification

Service Fast Learn Adapts

Service Fast Learn Adapts is a procedure for 6-speed automatic transmissions in which a series of driving maneuvers are used to allow the transmission control module (TCM) to learn individual clutch characteristics. Once the clutch data is learned, Service Fast Learn Adapts translates it into the adaptive data cells, which the TCM uses for clutch control during shifts.

When running the SFL adapts procedure with the Tech 2, the procedure may fail. The following drive procedure can be successfully used as a substitute

The drive procedure is required when

1. The TCM calibration is changed.
2. Internal transmission repairs such as valve body or control solenoid w/TCM replacement or overhaul.

The drive procedure is NOT required when

The transmission is replaced. Replacement transmission assemblies already have the adapts set by the transmission assembly plant.

Before and During Drive Cycle

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

1. Drive maneuvers should be performed when the transmission oil temperature is at least 40°C (104°F).
2. Transmission oil level is properly set before starting drive cycles.
3. Initial up shifts may be erratic for several drive cycles. They should improve significantly with repeated maneuvers.
4. At the start of the drive cycles, check for ECM or TCM, DTCs and be sure the MIL is not be illuminated.

Drive Cycle

1. From a complete stop, lightly accelerate at a relatively constant throttle pedal position up to 40 or 63 km/h (25 or 40 mph).
2. Brake the vehicle to a complete stop.
3. Repeat five times to 40 km/h (25 mph) and five times to 63 km/h (40 mph). Maneuvers can be performed in any combinations.

Garage Shifts

If the garage shifts (Park to Reverse, Park to Drive, Reverse to Drive, Drive to Reverse) feel like they are delayed or are harsh, garage shift adapts can also be performed.

1. Shift the transmission from Reverse to Drive leaving the shift lever in Drive for 3 seconds. After 3 seconds, shift back to Reverse leaving the shift lever in Reverse for 3 seconds. Perform the procedure 10 times (R-D-R-D-R-D...). The shift transitions need to be directly to Drive and Reverse, without stopping in Neutral.
2. Shift the transmission from Neutral to Drive leaving the shift lever in Drive for 3 seconds. After 3 seconds, shift back to Neutral leaving the shift lever in Neutral for 3 seconds. Perform the procedure 10 times (N-D-N-D-N-D...).
3. Shift the transmission from Neutral to Reverse leaving the shift lever in Reverse for 3 seconds. After 3 seconds, shift back to Neutral leaving the shift lever in Neutral for 3 seconds. Perform the procedure 10 times (R-D-R-D-R-D...).

At the end of these maneuvers, the vehicle may still experience some minor driveability issues, but should learn improved shifting performance over the next several key cycles and driving time. Coach the customer about the transmission's ability to self correct shifting issues or concerns. The transmission adapts are always functional and operate at transmission oil temperatures above 40°C (104°F).

Transmission Fluid Check

This procedure checks both the transmission fluid level, as well as the condition of the fluid itself. Since the transmission on this vehicle is not equipped with a fill tube and dipstick, a tube in the bottom pan is used to set the fluid level.

Note. The transmission fluid level must be checked when the transmission fluid temperature (TFT) is between 30-50°C (86-122°F). If the TFT is not within this range, operate the vehicle or allow the fluid to cool as required. Setting the fluid level with a TFT outside this range will result in either an under or overfilled transmission. TFT>50°C=under-filled, TFT<30°C=over-filled. An under-filled transmission will cause premature component wear or damage. An overfilled transmission will cause fluid to discharge out the vent tube, fluid foaming, or pump cavitation.

1. Observe the TFT using the driver information center (DIC) or a scan tool.
2. Start and idle the engine.
3. Depress the brake pedal and move the shift lever through each gear range. Pause for at least 3 seconds in each range. Move the shift lever back to PARK. Ensure the engine RPM is low (500-800 RPM).
4. Allow the engine to idle for at least 1 minute.
5. Raise the vehicle on a hoist. The vehicle must be level, with the engine running and the shift lever in the PARK range.
6. Remove the trans oil level check plug (1) from the transmission fluid pan. Allow any fluid (2) to drain. If the fluid is flowing as a steady stream, wait until the fluid begins to drip. If no fluid comes out, add fluid until fluid drips out. Refer to «Transmission Fluid Fill Procedure»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__transmission-fluid-fill-procedure) .
7. Inspect the fluid color. The fluid should be red or dark brown. If the fluid color is very dark or black and has a burnt odor, inspect the fluid and inside of the bottom pan for excessive metal particles or other debris. A small amount of "friction" material in the bottom pan is a "normal" condition. If large pieces and/or metal particles are noted in the fluid or bottom pan, flush the oil cooler and cooler lines and overhaul the transmission. If there are no signs of transmission internal damage noted, replace the fluid filter assembly, repair the oil cooler, and flush the cooler lines. Fluid that is cloudy or milky or appears to be contaminated with water indicates engine coolant or water contamination. Refer to «Engine Coolant/Water in Transmission»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__engine-coolantwater-in-transmission) .
8. Replace the trans oil level check plug and tighten to 25 N.m (18 lb ft).
9. Inspect for external leaks. Refer to «Fluid Leak Diagnosis»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) .
10. Reset the oil life monitor only if the fluid was changed.

Transmission Fluid Fill Procedure

Note. Use Dexron VI transmission fluid only. Failure to use the proper fluid may result in transmission internal damage.

Perform this procedure for vehicles with transmissions that are not equipped with a fill tube and dipstick. Based on accessibility, transmission fluid may be added through the fluid fill tube plug assembly (1) hole or through the oil level check plug (2) hole in the bottom of the transmission fluid pan.

Tools Required

1. DT 47784 Transmission Fluid Fill Pan Adapter. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__special-tools) .
2. J 45096 Transmission Oil Cooling System Flush and Flow Test Tool
3. J 45096-30 Transmission Cooler Flush Adapters. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__special-tools) .
4. J 45096-40 Transflow Oil Fill Adapter. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__special-tools) .

Fill Tube Plug Method

1. Clean around the fluid fill tube plug.
2. Unlock the fill tube plug by lifting the plunger. Once the plunger is lifted, remove the entire plug assembly.
3. Determine the approximate amount of fluid needed to fill the transmission, based on the repair performed. Refer to «Fluid Capacity Specifications»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__fluid-capacity-specifications) . To avoid an under-fill condition, slightly overfill the transmission, and then allow the extra fluid to drain during the fluid checking procedure.
4. Using the J 45096-40 (1) and the J 45096 (2), or a suitable hand pump, add transmission fluid through the fill tube plug opening. Refer to «Transmission Fluid Cooler Flushing and Flow Test (J 45096)»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__transmission-fluid-cooler-flushing-and-flow) for complete J 45096 operating instructions. Use the FLOW position on the main function switch to pump the fluid.
5. Check the fluid level. Refer to «Transmission Fluid Check»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__transmission-fluid-check) .

Check Plug Method

1. Remove the oil level check plug.
2. Install the DT 47784 (1) and, if necessary, one adapter from the J 45096-30 (2). See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__special-tools) .
3. Determine the approximate amount of fluid needed to fill the transmission, based on the repair performed. Refer to «Fluid Capacity Specifications»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__fluid-capacity-specifications) . To avoid an under-fill condition, slightly overfill the transmission, and then allow the extra fluid to drain during the fluid checking procedure.
4. Using the DT 47784 (1), J 45096-30 (2), and the J 45096 (3), add transmission fluid through the check plug hole. Refer to «Transmission Fluid Cooler Flushing and Flow Test (J 45096)»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__transmission-fluid-cooler-flushing-and-flow) for complete J 45096 operating instructions. Use the FLOW position on the main function switch to pump the fluid.
5. Start the engine and move the shift lever through each gear range. Pause for at least 3 seconds in each gear range.
6. With the engine still running, remove the DT 47784 (1), J 45096-30 (2), and J 45096 (3) and then check the fluid level. Refer to «Transmission Fluid Check»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__transmission-fluid-check) .

Scheme 85

Tools Required

J 21867 Pressure Gage

1. Install a scan tool.
2. Start the engine.
3. Inspect the transmission for the proper fluid level. Refer to «Transmission Fluid Check»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__transmission-fluid-check) .
4. Use the scan tool to inspect for any active or stored diagnostic trouble codes.
5. Inspect the manual linkage at the transmission for proper function.
6. Turn the engine OFF.
7. Remove the line pressure test hole plug.
8. Install the J 21867 .
9. Access the Scan Tool Transmission Output Controls for the Line PC Solenoid.
10. Start the engine.
11. Use the scan tool to increase and decrease the Line PC Solenoid in increments of approximately 100 kPa (15 psi). The scan tool commands the increment values automatically.
12. Allow the pressure to stabilize between increments.
13. Compare your pressure readings on the scan tool to those indicated on the J 21867 .
14. If the pressure readings vary greatly, refer to «Fluid Pressure High or Low»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__fluid-pressure-high-or-low) .
15. Turn the engine OFF.
16. Remove the J 21867 .
17. Install the line pressure test hole plug. Tighten: Tighten the pressure plug to 11 N.m (97 lb in).

Road Test

The following test provides a method of evaluating the condition of the automatic transmission. The test is structured so that most driving conditions would be achieved. The test is divided into the following parts

1. Electrical Function Check
2. Upshift Control and Torque Converter Clutch (TCC) Apply
3. Part Throttle Detent Downshifts
4. Manual Downshifts
5. Coasting Downshifts
6. Manual Gear Range Selection REVERSE Driver Shift Control

Before the road test, ensure the following

1. The engine is performing properly.
2. Transmission fluid level is correct. Refer to «Transmission Fluid Check»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__transmission-fluid-check) .
3. Tire pressure is correct.

During the road test

1. Perform the test only when traffic conditions permit.
2. Operate the vehicle in a controlled, safe manner.
3. Observe all traffic regulations.
4. View the scan tool data while conducting this test. Take along qualified help in order to operate the vehicle safely.
5. Observe any unusual sounds or smells.

After the road test, check the following

1. Inspect for proper transmission fluid level. Refer to «Transmission Fluid Check»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__transmission-fluid-check) .
2. Inspect for any diagnostic trouble codes (DTCs) that may have set during the testing. Refer to the applicable DTC.
3. Monitor the scan tool data for any abnormal readings or data.
4. Inspect for fluid leaks. Refer to «Fluid Leak Diagnosis»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) .

Electrical Function Check

Perform this procedure first in order to ensure the electronic transmission components are functioning properly. If these components are not checked, a simple electrical condition could be misdiagnosed.

1. Connect the scan tool.
2. Ensure the gear selector is in PARK and set the parking brake.
3. Start the engine.
4. Verify that the following scan tool data can be obtained and is functioning properly. Refer to «Scan Tool Data List»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__scan-tool-data-list) for typical data values. Data that is questionable may indicate a concern. Engine Speed Transmission ISS Transmission OSS Vehicle Speed IMS Commanded Gear Gear Ratio Line PC Sol. Pressure Cmd. TCC Brake Switch ECT, Engine Data List Trans. Fluid Temp. TCM Temperature Calc. Throttle Position Ignition Voltage TFP Switch 1 TFP Switch 3 TFP Switch 4 TFP Switch 5 PC Sol. 2 Pressure Cmd. PC Sol. 3 Pressure Cmd. PC Sol. 4 Pressure Cmd. PC Sol. 5 Pressure Cmd. Shift Solenoid 1 Shift Solenoid 2 TCC PC Sol. Duty Cycle TCC Slip Speed
5. Monitor the TCC Brake Switch parameter while applying and releasing the brake pedal. The scan tool should display: Open when the brake pedal is applied. Closed when the brake pedal is released.
6. Check the garage shifts. Apply the brake pedal and ensure the parking brake is set. Move the gear selector through the following ranges: PARK to REVERSE REVERSE to NEUTRAL NEUTRAL to DRIVE Pause 2 to 3 seconds in each gear position. Verify the gear engagements are immediate and not harsh.
7. Monitor transmission range on the scan tool, engine data list. Apply the brake pedal and ensure the parking brake is set. Move the gear selector through all ranges. Pause 2 to 3 seconds in each range. Return gear selector to PARK. Verify that all selector positions match the scan tool display.
8. Check throttle position input. Apply the brake pedal and ensure the parking brake is set. Ensure the gear selector is in PARK. Monitor the scan tool Calc. Throttle Position while increasing and decreasing engine speed with the throttle pedal. The scan tool Calc. Throttle Position percentage should increase and decrease with engine speed.

If any of the above checks do not perform properly, record the result for reference after completion of the road test.

Upshift Control and Torque Converter Clutch (TCC) Apply

The TCM calculates the upshift points based primarily on 2 inputs: throttle position and vehicle speed. When the TCM determines that conditions are met for a shift to occur, the TCM commands the shift by closing or opening the ground circuit for the appropriate solenoid.

Perform the following steps

1. Refer to «Shift Speed»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__shift-speed) table in this section and choose a throttle position of 12.5 percent or 25 percent. All throttle positions shown should be tested to cover the normal driving range.
2. Monitor the following scan tool parameters: Calc. Throttle Position Vehicle Speed Engine Speed Transmission ISS Transmission OSS Commanded Gear TCC PC Sol. Pressure Cmd. TCC Pressure Actual TCC Slip Speed TFP Switch 1 TFP Switch 3 TFP Switch 4 TFP Switch 5 PC Sol. 2 Pressure Cmd. PC Sol. 3 Pressure Cmd. PC Sol. 4 Pressure Cmd. PC Sol. 5 Pressure Cmd. Shift Solenoid 1 and 2
3. Place the gear selector in the DRIVE position.
4. Accelerate the vehicle using the chosen throttle position. Hold the throttle steady.
5. As the transmission upshifts, there should be a noticeable shift feel or engine speed change within 1 to 2 seconds of the commanded gear change. The TCC feel may not be noticeable. Look for 100-300 RPM engine speed change.
6. Compare the shift speeds to the Shift Speed table. Refer to «Shift Speed»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__shift-speed) . Shift speeds may vary slightly due to TFT or other operating variables, including hydraulic delays in responding to electronic controls. Note any harsh, soft or delayed shifts or slipping. Note any noise or vibration.
7. Monitor TCC PC solenoid current while driving and make sure the current rises when the TCC is commanded to apply. When the TCC applies there should be a noticeable drop in engine speed and a drop in slip speed to below 100 RPM. If the TCC apply can not be detected: Check for DTCs. Refer to «Torque Converter Diagnosis»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e__torque-converter-diagnosis) . Apply and release the brake pedal. The TCC will release on most applications.

Part Throttle Detent Downshift

1. Place the gear selector in the DRIVE position.
2. Accelerate the vehicle to 64-88 km/h (40-55 mph) in 6th gear.
3. Quickly increase throttle angle to between 25-30 percent.
4. Verify the following: The TCC releases. The transmission downshifts immediately.

Manual Downshifts

Manual downshift testing is not required for vehicles equipped with Driver Shift Control (DSC). The TCM and shift solenoids will automatically override DSC downshifts to protect the transmission from damage.

Coasting Downshifts

1. Place the gear selector in the DRIVE position.
2. Accelerate the vehicle to 6th gear with the TCC applied.
3. Release the throttle and apply the brakes
4. Verify the following: The TCC releases (on most applications). Downshifts occur as commanded.

Manual Gear Range Selection

This application does not utilize manual forward gear ranges.

Reverse

Perform the following test using a 10-15 percent throttle position.

1. With the vehicle stopped, move the gear selector to REVERSE.
2. Slowly accelerate the vehicle.
3. Verify that there is no noticeable slip, noise or vibration.

Driver Shift Control (DSC)

Refer to the owner's manual for specific instructions on DSC. The TCM will upshift automatically when maximum engine speed is achieved and will protect from any downshift which may cause excessive engine RPMs.

Torque Converter Diagnosis

The torque converter clutch (TCC) is applied by fluid pressure, which is controlled by a TCC pressure control (PC) solenoid. This solenoid is part of the control solenoid valve assembly, which is located inside the automatic transmission assembly. The solenoid is controlled through a combination of computer controlled switches and sensors.

Torque Converter Stator

The torque converter stator roller clutch can have 2 different malfunctions.

1. The stator assembly freewheels in both directions.
2. The stator assembly remains locked up at all times.

Poor Acceleration at Low Speed

If the stator is freewheeling at all times, the vehicle tends to have poor acceleration from a standstill. At speeds above 50-55 km/h (30-35 mph), the vehicle may act normally. For poor acceleration, you should first determine that the exhaust system is not blocked, and the transmission is in First gear when starting out.

If the engine freely accelerates to high RPM in NEUTRAL, you can assume that the engine and the exhaust system are normal. Check for poor performance in DRIVE and REVERSE to help determine if the stator is freewheeling at all times.

Poor Acceleration at High Speed

If the stator is locked up at all times, performance is normal when accelerating from a standstill. Engine RPM and vehicle speed are limited or restricted at high speeds. Visual examination of the converter may reveal a blue color from overheating.

If the converter has been removed, you can check the stator roller clutch by inserting a finger into the splined inner race of the roller clutch and trying to turn the race in both directions. You should be able to freely turn the inner race clockwise, but you should have difficulty in moving the inner race counterclockwise or you may be unable to move the race at all.

Noise

You may notice a torque converter whine when the vehicle is stopped and the transmission is in DRIVE or REVERSE. This noise will increase as you increase the engine RPM. The noise will stop when the vehicle is moving or when you apply the torque converter clutch, because both halves of the converter are turning at the same speed.

Perform a stall test to make sure the noise is actually coming from the converter

1. Place your foot on the brake.
2. Put the gear selector in DRIVE.
3. Depress the accelerator to approximately 1,200 RPM for no more than six seconds.

A torque converter noise will increase under this load.

Torque Converter Clutch Shudder

The key to diagnosing torque converter clutch (TCC) shudder is to note when it happens and under what conditions.

TCC shudder which is caused by the transmission should only occur during the apply or the release of the converter clutch. Shudder should never occur after the TCC plate is fully applied.

If Shudder Occurs During TCC Apply or Release

If the shudder occurs while the TCC is applying, the problem can be within the transmission or the torque converter. Something is causing one of the following conditions to occur

1. Something is not allowing the clutch to become fully engaged.
2. Something is not allowing the clutch to release.
3. The clutch is releasing and applying at the same time.

One of the following conditions may be causing the problem to occur

1. Leaking turbine shaft seals
2. A restricted release orifice
3. A distorted clutch or housing surface due to long converter bolts
4. Defective friction material on the TCC plate

If Shudder Occurs After TCC has Applied

If shudder occurs after the TCC has applied, most of the time there is nothing wrong with the transmission.

The TCC is not likely to slip after the TCC has been applied. Engine problems may go unnoticed under light throttle and load, but they become noticeable after the TCC apply when going up a hill or accelerating. This is due to the mechanical coupling between the engine and the transmission.

Once TCC is applied, there is no torque converter (fluid coupling) assistance. Engine or driveline vibrations could be unnoticeable before TCC engagement.

Inspect the following components in order to avoid misdiagnosis of TCC shudder. An inspection will also avoid the unnecessary disassembly of a transmission or the unnecessary replacement of a torque converter.

1. Spark plugs-Inspect for cracks, high resistance or a broken insulator.
2. Plug wires-Look in each end. If there is red dust (ozone) or a black substance (carbon) present, then the wires are bad. Also look for a white discoloration of the wire. This indicates arcing during hard acceleration.
3. Coil-Look for a black discoloration on the bottom of the coil. This indicates arcing while the engine is misfiring.
4. Fuel injector-The filter may be plugged.
5. Vacuum leak-The engine will not get a correct amount of fuel. The mixture may run rich or lean depending on where the leak occurs.
6. EGR valve-The valve may let in too much or too little unburnable exhaust gas and could cause the engine to run rich or lean.
7. MAP/MAF sensor-Like a vacuum leak, the engine will not get the correct amount of fuel for proper engine operation.
8. Carbon on the intake valves-Carbon restricts the proper flow of air/fuel mixture into the cylinders.
9. Flat cam-Valves do not open enough to let the proper fuel/air mixture into the cylinders.
10. Oxygen sensor-This sensor may command the engine too rich or too lean for too long.
11. Fuel pressure-This may be too low.
12. Engine mounts-Vibration of the mounts can be multiplied by TCC engagement.
13. Axle joints-Check for vibration.
14. TP Sensor-The TCC apply and release depends on the TP Sensor in many engines. If the TP Sensor is out of specification, TCC may remain applied during initial engine loading.
15. Cylinder balance-Bad piston rings or poorly sealing valves can cause low power in a cylinder.
16. Fuel contamination-This causes poor engine performance.

Replace the torque converter if any of the following conditions exist

1. External leaks appear in the hub weld area.
2. The converter hub is scored or damaged.
3. The converter pilot is broken, damaged, or fits poorly into the crankshaft.
4. You discover steel particles after flushing the cooler and the cooler lines.
5. The pump is damaged, or you discover steel particles in the converter.
6. The vehicle has TCC shudder and/or no TCC apply. Replace the torque converter only after all hydraulic and electrical diagnoses have been made. The converter clutch material may be glazed.
7. The converter has an imbalance which cannot be corrected. Refer to «Flexplate/Torque Converter Vibration Test»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-6l80e) .
8. The converter is contaminated with engine coolant which contains antifreeze or water.
9. An internal failure occurs in the stator roller clutch.
10. You notice excessive end play.
11. Overheating produces heavy debris in the clutch or converter ballooning.
12. You discover steel particles or clutch lining material in the fluid filter or on the magnet, when no internal parts in the unit are worn or damaged. This condition indicates that lining material came from the converter.