Transfer Case - Bw 4474 Cadillac ATS I

Approximate Fluid Capacities

Approximate Fluid Capacities

Fastener Tightening Specifications

Fastener Tightening Specifications

Transfer Case Mechanical Specifications

Transfer Case Mechanical Specifications

Spacer and Shim Specifications

Spacer and Shim Specifications

Adhesives, Fluids, Lubricants, and Sealers

Adhesives, Fluids, Lubricants, and Sealers

Scheme 1

Scheme 2

Scheme 3

Diagnostic Code Index

DIAGNOSTIC CODE INDEX

Diagnostic Instructions

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit/System Description

1. This is an internal fault detection of the transfer case control module. No external circuits are involved.
2. This DTC is set anytime the transfer case control module is replaced or reprogrammed.
3. The Transfer Case Clutch Identifier Configuration/Reset function must be performed to clear this code.

Conditions for Running the DTC

1. Engine ON.
2. System voltage 9-18 V.
3. The diagnostic is run 5 s after engine ON.

Conditions for Setting the DTC

1. The transfer case control module detects an invalid transfer case clutch identifier number in memory.
2. The valid production transfer case clutch identifier numbers are 1-9.
3. The valid service transfer case clutch calibration identification number is 9.

Action Taken When the DTC Sets

1. The K69 Transfer Case Control Module defaults to transfer case clutch identifier number 9 performance.
2. The SERVICE 4WD indicator will NOT illuminate.
3. Failure records will be recorded.

Conditions for Clearing the DTC

The K69 Transfer Case Control Module clears the DTC once the Transfer Case Clutch Identifier Configuration/Reset function has been successfully performed.

Diagnostic Aids

1. Any time the clutch pack assembly, the K69 Transfer Case Control Module, or the transfer case assembly has been replaced, the Transfer Case Clutch Identifier Configuration/Reset function needs to be run.
2. If power is lost during Transfer Case Clutch Identifier Configuration/Reset, the transfer case control module may get stuck in a programming loop and will not be able to update. If this occurs, and the DTC resets, replace the transfer case control module.

Reference Information

Schematic Reference

All-Wheel Drive Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Electrical Information Reference

1. «Circuit Testing»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information.

Circuit/System Verification

1. Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down.
2. Engine running for at least 1 minute.
3. Verify that DTC C038C is not set. If the DTC is set Perform the Transfer Case Clutch Identifier Configuration/Reset function. Refer to «Transfer Case Shift Control Module Scan Tool Information (BW 4474)»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-scan-tool-information-2-of-2__transfer-case-shift-control-module-scan) . If the DTC is not set
4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Control Module References»(/cadillac/ats/i-2012-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for K69 Transfer Case Control Module replacement, setup, and programming
2. «Transfer Case Shift Control Module Scan Tool Information (BW 4474)»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-scan-tool-information-2-of-2__transfer-case-shift-control-module-scan) for Transfer Case Clutch Identifier Configuration/Reset

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Diagnostic Fault Information

The transfer case normally operates in 2WD mode. When all wheel drive (AWD) is requested, the transfer case control module sends 12 volts to the transfer case clutch coil via the clutch coil control circuit. This engages the transfer case clutch assembly through a ball and cam apply system. The transfer case clutch coil is controlled by a high and low side driver. Both circuits must be activated to engage the system.

1. Engine ON.
2. System voltage 8.5-18.0 V.
3. High side and low side drivers must be commanded OFF.
4. These DTC's run during transfer case control module power up.

C0399 01

The voltage detected by the transfer case control module, on the control circuit and the low reference circuit when both the high side driver and the low side driver are off, is greater than 3.9 V for greater than 5 s.

C0399 02

The voltage detected by the transfer case control module, on the control circuit and the low reference circuit, when both the high side driver and the low side driver are off, is 0.00 V for greater than 5 s.

C0399 04

The voltage detected by the transfer case control module is greater than 0.9 V on the control circuit when the high side driver is off, and 0.0 V on the low reference circuit when the low side driver is off for greater than 5 s.

1. The transfer case will be in 2WD mode while the fault is present.
2. AWD disabled.
3. The SERVICE AWD indicator remains illuminated for the remainder of the current ignition cycle.
4. The transfer case control module records the operating conditions at the time of the failure in the Failure Records.

1. The transfer case control module clears the DTC once the conditions for setting the DTC are no longer present.
2. A history DTC clears after 40 consecutive warm up cycles without a fault present.
3. All DTCs can be cleared using a scan tool.
4. Clearing DTCs will also clear failure records.

1. Check failure records for further information on the conditions present when this DTC set.
2. Make sure system voltage is above 9.0 volts as Special Functions will not work correctly if the system is below this voltage.
3. The default actions for DTC P0562 or P0563 may cause this DTC to set.
4. The transfer case drain plug is a good source for ground.
5. EL-49742 harness is a good source for B+ and ground.
6. The transfer case drain plug is a good source for ground.

Schematic Reference

All-Wheel Drive Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Electrical Information Reference

1. «Circuit Testing»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Special Tools

J 35616 GM-Approved Terminal Test Kit

1. Ignition ON, engine OFF.
2. Verify DTC C0399 is only set as a history DTC. If the DTC is set as current Refer to Circuit/System Testing. If the DTC is set as history
3. Visually inspect each connector terminal of the K69 Transfer Case Control Module connector for damage or corrosion. If damage or corrosion exists Repair as necessary. If damage or corrosion does not exist
4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data. The DTC should not set. If the DTC sets Refer to Circuit/System Testing. If the DTC does not set
5. All OK.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the M71 Transfer Case Clutch Coil.
2. Test for 3.4-3.9 V between the control circuit, terminal A, and ground. If less than 3.4 V Ignition OFF, disconnect the X1 harness connector at the K69 Transfer Case Control Module. Test for less than 10 ohms in control circuit end to end. If 10 ohms or greater, repair the open/high resistance in the circuit. If less than 10 ohms Test for infinite resistance between the control circuit and ground. If less than infinite resistance, repair the short to ground in the circuit. If infinite resistance Test for infinite resistance between the control circuit, terminal 5, and all other pins of the K69 Transfer Case Control Module harness connector X1. If less than infinite resistance, repair the shorted together condition in the affected circuits. If infinite resistance, replace the K69 Transfer Case Control Module and perform the Transfer Case Clutch Identifier Configuration/Reset function. Refer to «Transfer Case Shift Control Module Scan Tool Information (BW 4474)»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-scan-tool-information-2-of-2__transfer-case-shift-control-module-scan) . If greater than 3.9 V Ignition OFF, disconnect the X1 harness connector at the K69 Transfer Case Control Module. Ignition ON, engine OFF. Test for less than 1 V between the control circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Test for infinite resistance between the control circuit, terminal 5, and all other pins of the K69 Transfer Case Control Module harness connector X1. If less than infinite resistance, repair the shorted together condition in the affected circuits. If infinite resistance, replace the K69 Transfer Case Control Module and perform the Transfer Case Clutch Identifier Configuration/Reset function. Refer to «Transfer Case Shift Control Module Scan Tool Information (BW 4474)»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-scan-tool-information-2-of-2__transfer-case-shift-control-module-scan) . If between 3.4-3.9 V
3. Test for 3.4-3.9 V between the control circuit, terminal A, and the low reference circuit, terminal B. If less than 3.4 V Ignition OFF, disconnect the X1 harness connector at the K69 Transfer Case Control Module. Test for less than 10 ohms in the low reference circuit end to end. If 10 ohms or greater, repair the open/high resistance in the circuit. If less than 10 ohms Test for infinite resistance between the low reference circuit and ground. If less than infinite resistance, repair the short to ground in the circuit. If infinite resistance Test for infinite resistance between the low reference circuit, terminal 4, and all other pins of the K69 Transfer Case Control Module harness connector X1. If less than infinite resistance, repair the shorted together condition in the affected circuits. If infinite resistance, replace the K69 Transfer Case Control Module and perform the Transfer Case Clutch Identifier Configuration/Reset function. Refer to «Transfer Case Shift Control Module Scan Tool Information (BW 4474)»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-scan-tool-information-2-of-2__transfer-case-shift-control-module-scan) . If greater than 3.9 V Ignition OFF, disconnect the X1 harness connector at the K69 Transfer Case Control Module. Ignition ON, engine OFF. Test for less than 1 V between the low reference circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Test for infinite resistance between the low reference circuit, terminal 4, and all other pins of the K69 Transfer Case Control Module harness connector X1. If less than infinite resistance, repair the shorted together condition in the affected circuits. If infinite resistance, replace the K69 Transfer Case Control Module and perform the Transfer Case Clutch Identifier Configuration/Reset function. Refer to «Transfer Case Shift Control Module Scan Tool Information (BW 4474)»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-scan-tool-information-2-of-2__transfer-case-shift-control-module-scan) . If between 3.4-3.9 V
4. Control circuit, low reference, and K69 Transfer Case Control Module OK.

Component Testing

M71 Transfer Case Clutch Coil

1. Ignition OFF, disconnect the harness connector at the M71 Transfer Case Clutch Coil.
2. Test for 2.5-3.5 ohms between the control circuit, terminal A, and the low reference circuit, terminal B. If not between 2.5-3.5 ohms Replace the M71 Transfer Case Clutch Coil and perform the Transfer Case Clutch Identifier Configuration/Reset function. Refer to «Transfer Case Shift Control Module Scan Tool Information (BW 4474)»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-scan-tool-information-2-of-2__transfer-case-shift-control-module-scan) . If between 2.5-3.5 ohms
3. M71 Transfer Case Clutch Coil OK.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Control Module References»(/cadillac/ats/i-2012-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for transfer case control module replacement, setup, and programming
2. «Transfer Case Shift Control Module Scan Tool Information (BW 4474)»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-scan-tool-information-2-of-2__transfer-case-shift-control-module-scan) for the Transfer Case Clutch Identifier Configuration/Reset function
3. «Transfer Case Assembly Replacement»(/cadillac/ats/i-2012-2014/remont/transfer-case/#transfer-case-bw-4474)

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The transfer case fluid temperature sensor is a thermistor. The transfer case control module supplies a 5-volt reference circuit and a low reference circuit to the sensor. When the transfer case fluid is cold, the sensor resistance is high and the transfer case control module senses a low signal voltage on the low reference circuit. As the transfer case fluid warms, the sensor resistance lowers and the transfer case control module senses higher voltage on the low reference circuit. The transfer case control module uses this information to modify all-wheel drive duty cycle.

1. Engine ON for at least 5 s.
2. System voltage is 8.5-18.0 V.
3. DTC P0641 is not set.
4. DTC C0401 03 and DTC C401 08 run continuously.
5. DTC C0401 07 runs at key ON provided there has been an engine off period of at least 10 minutes prior to the key ON.

C0401 03

1. Vehicle speed greater than 73 kph (45 mph) for 5 minutes during an ignition cycle. Time at speed does not have to be continuous.
2. The transfer case control module detects that the transfer case temperature is less than -40°C (-40°F) (0.03 V). (Sensor stuck LOW).
3. This DTC runs continuously.

C0401 07

1. Engine off time since last engine ON, 10 minutes.
2. The transfer case control module detects that the transfer case temperature is greater than 149°C (300°F) (4.97 V). (Sensor stuck HIGH).
3. This DTC runs at transfer case control module power up.

C0401 08

1. The transfer case control module detects an abrupt transfer case temperature change of greater than 20°C (36°F) per second with the low reference stuck high or stuck low for 5 s.
2. This DTC runs continuously.

1. Transfer case defaults to 2WD.
2. The transfer case fluid temperature will default to estimated values based on engine intake air temperature and transmission fluid temperature.
3. Failure record recorded.
4. The SERVICE AWD indicator will NOT illuminate.
5. The AWD OFF indicator will illuminate if due to an actual overheat condition.

1. The transfer case shift control module clears the active DTC once the conditions for setting the DTC are no longer present.
2. A history DTC clears after 40 consecutive warm up cycles without a fault present.
3. All DTCs can be cleared using a scan tool.
4. Clearing DTCs will also clear failure records.

1. Check failure records for further information on the conditions present when this DTC set.
2. If the transfer case oil temperature sensor circuits are open or have high resistance the scan tool will indicate -40°C (-40°F).
3. If the transfer case oil temperature circuits are shorted to voltage the scan tool will read 154°C (300°F).
4. If the transfer case fluid temperature DTC is set due to an actual overheat condition, and not an electrical fault, the SERVICE AWD indicator will NOT illuminate, but the AWD OFF indicator WILL illuminate for as long as the temperature stays above the 135°C (275°F) thermal reset threshold.
5. Once corrected, you must power down the K69 transfer case control module in order to clear this code.
6. EL-49742 harness is a good source for B+ and ground.
7. The transfer case drain plug is a good source for ground.

Schematic Reference

All-Wheel Drive Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Electrical Information Reference

1. «Circuit Testing»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information.

1. Ignition ON, Engine OFF.
2. Verify DTC P0641 is NOT set. If DTC P0641 is set Diagnose DTC P0641 first. Refer to «DTC P0641»(/cadillac/ats/i-2012-2014/remont/transfer-case/#transfer-case-bw-4474) . If DTC P0641 is NOT set
3. Verify the transfer case 5V Reference parameter remains between 4.875-5.125 V. If NOT between 4.875-5.125 V Refer to Circuit/System Testing. If between 4.875-5.125 V
4. Verify the transfer case 5V Reference Circuit Status parameter displays OK. If the transfer case 5V Reference Circuit Status parameter does NOT display OK Refer to Circuit/System Testing. If the transfer case 5V Reference Circuit Status parameter does display OK
5. Verify DTC C0401 is only set as a history DTC. If the DTC is set as current Refer to Circuit/System Testing. If the DTC is set as history
6. Verify the integrity of each connector terminal of the K69 Transfer Case Control Module connector and the B109 Transfer Case Fluid Temperature Sensor connector for damage or corrosion. Repair as necessary.
7. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
8. Verify the DTC C0401 does not set. If the DTC sets Refer to Circuit/System Testing. If the DTC does not set
9. All OK.

1. Ignition OFF, disconnect the harness connector at the B109 Transfer Case Fluid Temperature Sensor.
2. Test for 4.875-5.125 V between the transfer case 5 V reference circuit terminal A, and ground. If less than 4.875 V Ignition OFF, disconnect the X1 harness connector at the K69 Transfer Case Control Module. Test for infinite resistance between the 5 V reference circuit, K69 Transfer Case Control Module X1 harness terminal 9, and body ground. If less than infinite resistance, repair the short to ground in the circuit. If infinite resistance Test for less than 2 ohms in the 5 V reference circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms Test for infinite resistance between the 5 V reference circuit, terminal 9, and all other pins of the K69 Transfer Case Control Module X1 harness connector. If less than infinite resistance, repair the shorted together condition in the affected circuits. If infinite resistance, replace the K69 Transfer Case Control Module and perform the Transfer Case Clutch Identifier Configuration/Reset Function. Refer to «Transfer Case Shift Control Module Scan Tool Information (BW 4474)»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-scan-tool-information-2-of-2__transfer-case-shift-control-module-scan) . If greater than 5.125 V Ignition OFF, disconnect the X1 harness connector at the K69 Transfer Case Control Module. Test for infinite resistance between the 5 V reference circuit, terminal 9, and all other pins of the K69 Transfer Case Control Module X1 harness connector. If less than infinite resistance, repair the shorted together condition in the affected circuits. If infinite resistance, replace the K69 Transfer Case Control Module and perform the Transfer Case Clutch Identifier Configuration/Reset Function. Refer to «Transfer Case Shift Control Module Scan Tool Information (BW 4474)»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-scan-tool-information-2-of-2__transfer-case-shift-control-module-scan) . If between 4.875-5.125 V
3. Test for 4.875-5.125 V between the transfer case 5 V reference circuit terminal A, and the low reference circuit terminal B. If less than 4.875 V Ignition OFF, disconnect the X harness connector at the K69 Transfer Case Control Module. Test for infinite resistance between the low reference circuit, K69 Transfer Case Control Module X1 harness terminal 1, and body ground. If less than infinite resistance, repair the short to ground in the circuit. If infinite resistance Test for less than 2 ohms in the low reference circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms Test for infinite resistance between the low reference circuit, terminal 1, and all other pins of the K69 Transfer Case Control Module X1 harness connector. If less than infinite resistance, repair the shorted together condition in the affected circuits. If infinite resistance, replace the K69 Transfer Case Control Module and perform the Transfer Case Clutch Identifier Configuration/Reset Function. Refer to «Transfer Case Shift Control Module Scan Tool Information (BW 4474)»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-scan-tool-information-2-of-2__transfer-case-shift-control-module-scan) . If greater than 5.125 V Ignition OFF, disconnect the X1 harness connector at the K69 Transfer Case Control Module. Test for infinite resistance between the low reference circuit, terminal 1, and all other pins of the K69 Transfer Case Control Module X1 harness connector. If less than infinite resistance, repair the shorted together condition in the affected circuits. If infinite resistance, replace the K69 Transfer Case Control Module and perform the Transfer Case Clutch Identifier Configuration/Reset Function. Refer to «Transfer Case Shift Control Module Scan Tool Information (BW 4474)»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-scan-tool-information-2-of-2__transfer-case-shift-control-module-scan) . If between 4.875-5.125 V
4. 5 V reference circuit, transfer case oil temperature sensor low reference circuit, and the transfer case control module OK.

B109 Transfer Case Fluid Temperature Sensor

1. Ignition ON, engine OFF.
2. Record the value from the Transfer Case Fluid Temperature Sensor parameter.
3. Ignition OFF, disconnect the X1 harness connector at the B109 Transfer Case Fluid Temperature Sensor.
4. Ignition ON, engine OFF.
5. Verify the scan tool Transfer Case Fluid Temperature Sensor parameter displays -40°C/-40°F. If the parameter does NOT display -40°C/-40°F Refer to Circuit/System Testing. If the parameter does display -40°C/-40°F
6. Using a fused jumper, jump the 5 V reference circuit terminal A to the low reference circuit terminal B at the B109 Transfer Case Fluid Temperature Sensor connector.
7. Verify the scan tool Calculated Transfer Case Clutch Temperature parameter displays 154°C/300°F. If less than 154°C/300°F Refer to Circuit/System Testing. If greater than 154°C/300°F Refer to Circuit/System Testing. If 154°C/300°F
8. Test the resistance between the 5 V reference circuit terminal A and the low reference circuit terminal B at the B109 Transfer Case Fluid Temperature Sensor. Refer to the Temperature Versus Resistance table below for the resistance values at various temperatures. If the resistance is outside the specified range Replace the B109 Transfer Case Fluid Temperature Sensor. If the resistance is within the specified range
9. B109 Transfer Case Fluid Temperature Sensor OK.

Temperature Versus Resistance

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Control Module References»(/cadillac/ats/i-2012-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for transfer case control module replacement, setup, and programming
2. «Transfer Case Fluid Temperature Sensor Replacement»(/cadillac/ats/i-2012-2014/remont/transfer-case/#transfer-case-bw-4474)
3. «Transfer Case Shift Control Module Scan Tool Information (BW 4474)»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-scan-tool-information-2-of-2__transfer-case-shift-control-module-scan) for Transfer Case Clutch Identifier Configuration/Reset function information

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

This DTC is set up to detect a high or low voltage situation. This could indicate a vehicle issue in which all electrical components would be affected. It could also be transfer case control module specific due to poor power or ground connections.

1. Ignition ON.
2. System voltage is 6.0-18.0 volts.
3. The diagnostic is run 5 s after engine ON.

P0562 00

System voltage less than 8.5 V.

P0563 00

System voltage greater than 18.0 V.

1. The vehicle will default to 2WD while the fault is present.
2. The AWD OFF indicator will be illuminated.
3. Failure records will be recorded.
4. If the voltage drops below 7 V, the transfer case control module will go offline and a Service AWD indicator will then be illuminated because the transfer case control module will no longer be transmitting on the Serial Data Line.

1. The transfer case control module clears the DTC if the conditions for setting the DTC are not currently present.
2. A history DTC clears after 40 consecutive warm up cycles without a fault present.
3. All DTCs can be cleared using a scan tool.
4. Clearing DTCs will also clear failure records.

1. Check failure records for further information on the conditions present when this DTC set.
2. Check other modules for voltage related DTCs as this may indicate a system wide voltage issue.
3. High voltage is likely a vehicle issue, such as an alternator problem, or the vehicle has been hooked up improperly during a jump start or overcharged with a battery charger.

Schematic Reference

All-Wheel Drive Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Electrical Information Reference

1. «Circuit Testing»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information.

1. Ignition ON, engine OFF.
2. Verify that the transfer case control module fuse, fuse 31 (X53A rear body fuse block) is NOT open. If the fuse is OPEN Test the battery positive voltage circuit, K69 Transfer Case Control Module harness X2 terminal C, for a short to ground. If the fuse is OK
3. Verify that the IP Body Ign fuse, fuse 47 (X50A fuse block - underhood) is NOT open. If the fuse is OPEN Test the Run/Crank Ignition 1 voltage circuit, K69 Transfer Case Control Module harness X1 terminal 3, for a short to ground. If the fuse is OK
4. Verify DTC B0151A, B151C, B1527, P0621, P0622, P0625 or P0626 is not set. If any of the DTCs are set Diagnose that DTC first. Refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) for further diagnosis. If none of the DTCs are set
5. Verify that the scan tool transfer case control module voltage signal parameter displays B+ (+0.0/-1.0 V). If the parameter does not display B+ (+0.0/-1.0 V) Refer to Circuit/System Testing. If the parameter does display B+ (+0.0/-1.0 V)
6. Verify DTC P0562 or P0563 is only set as a history DTC. If the DTC is set as current Refer to Circuit/System Testing. If the DTC is set as history
7. Visually inspect each connector terminal of the K69 Transfer Case Control Module connector for damage or corrosion. Repair as necessary.
8. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data. The DTC should not set. If the DTC sets Refer to Circuit/System Testing. If the DTC does not set
9. All OK.

1. Ignition OFF, disconnect the X2 harness connector at the K69 Transfer Case Control Module.
2. Test for less than 10 ohms between the ground circuit terminal D and ground. If 10 ohms or greater Repair the open/high resistance in the circuit. If less than 10 ohms
3. Test for B+ (+0.0/-1.0 V) between the battery positive voltage circuit terminal C, and the ground circuit terminal D. If less than B+ (+0.0/-1.0 V) Remove the transfer case control module fuse, X53A rear body fuse block. Test for less than 10 ohms in the battery positive voltage circuit end to end. If 10 ohms or greater, repair the open/high resistance in the circuit. If less than 10 ohms Test for infinite resistance between the battery positive voltage circuit and a good ground. If less than infinite resistance, repair the short to ground in the circuit. If infinite resistance Test for infinite resistance between the battery positive voltage circuit, terminal C and all other pins of the K69 Transfer Case Control Module harness connector X2. If less than infinite resistance, repair the shorted together condition in the affected circuits. If infinite resistance, replace the K69 Transfer Case Control Module and perform the Transfer Case Clutch Identifier Configuration/Reset function. Refer to «Transfer Case Shift Control Module Scan Tool Information (BW 4474)»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-scan-tool-information-2-of-2__transfer-case-shift-control-module-scan) . If B+ (+0.0/-1.0 V)
4. Disconnect the X1 harness connector at the K69 Transfer Case Control Module.
5. Ignition ON, engine ON.
6. Test for B+ (+0.0/-1.0 V) between the Run/Crank Ignition 1 Voltage circuit terminal 3 and ground. If less than B+ (+0.0/-1.0 V) Test for less than 10 ohms in the Run/Crank Ignition 1 Voltage circuit end to end. If 10 ohms or greater, repair the open/high resistance in the circuit. If less than 10 ohms Test for infinite resistance between the Run/Crank Ignition 1 Voltage circuit, terminal 3 and all other pins of the K69 Transfer Case Control Module harness connector. If less than infinite resistance, repair the shorted together condition in the affected circuits. If infinite resistance, replace the K69 Transfer Case Control Module and perform the Transfer Case Clutch Identifier Configuration/Reset function. Refer to «Transfer Case Shift Control Module Scan Tool Information (BW 4474)»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-scan-tool-information-2-of-2__transfer-case-shift-control-module-scan) . If greater than B+ (+0.0/-1.0 V) Test the charging system for proper operation. Refer to «Charging System Test»(/cadillac/ats/i-2012-2014/remont/body-electrical/#battery-charging-system-and-starting-system) . If B+ (+0.0/-1.0 V)
7. Battery positive voltage circuit, ground circuit, and K69 Transfer Case Control Module OK.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Control Module References»(/cadillac/ats/i-2012-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for transfer case control module replacement, setup, and programming
2. «Power Mode Mismatch»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures) to verify relays are operating properly
3. «DTC B1325, B1330, B1517, C0800, P0560, P0562, or P0563»(/cadillac/ats/i-2012-2014/remont/body-electrical/#battery-charging-system-and-starting-system) to verify the system voltage is within normal operating range

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

This is an internal fault detection of the K69 transfer case control module. This fault is handled inside the K69 transfer case control module. No external circuits are involved.

At each power-up, the K69 transfer case control module runs a self-test on the following

1. EEPROM Checksum
2. ROM Checksum
3. RAM Checksum

1. Engine ON.
2. System voltage 8.5-18 V
3. Diagnostic run continuously - DTC P0601 only
4. Diagnostic run at transfer case control module power up - DTCs P0604 and P062F

P0601

The read only memory (ROM), or the masked ROM, of the transfer case control module has failed the Checksum test indicating that the data is not currently valid.

P0604

The random access memory (RAM) of the transfer case control module has failed an operational test indicating that some portions of RAM are non-functional.

P062F

The critical operational parameters stored in the EEPROM of the transfer case control module have failed the Checksum test indicating invalid data.

P0601 and P0604

1. DTCs P0601 and P0604 are Type C DTCs.
2. The transfer case will default to 2WD High for the remainder of the current ignition cycle.
3. No further range changes shall be allowed.
4. The SERVICE AWD indicator remains illuminated for the remainder of the current ignition cycle.
5. The transfer case control module will store freeze frame data.

P062F

1. DTC P062F is a Type C DTC.
2. Default Long Term Memory Values will be used.
3. The SERVICE AWD indicator will NOT illuminate.
4. The transfer case control module will store freeze frame data.

DTCs P0601, P0604, and P062F are Type C DTCs.

1. DTC P0601 detects a non-volatile memory write error (ROM).
2. DTC P0604 detects the wrong copy of non-volatile memory in RAM or a RAM read/write failure.
3. DTC P062F detects a corruption of the EPROM/Flash memory.
4. Low voltage or a momentary loss of power or ground to the transfer case control module may cause a DTC to set. Verify the following: The battery cables are clean and tight, and the battery is fully charged. Refer to «Battery Inspection/Test»(/cadillac/ats/i-2012-2014/remont/body-electrical/#battery-charging-system-and-starting-system) . The transfer case control module ground circuits do not have an open or high resistance. The transfer case control module power circuits do not have an open, short to ground, or high resistance.

Schematic Reference

All-Wheel Drive Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Transfer Case Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

1. Ignition OFF for at least 1 minute to allow for the complete shutdown of the K69 Transfer Case Control Module. Engine ON.
2. Verify that DTC P0601, DTC P0604, or DTC P062F is only set as a history DTC. If any of the DTC's are set as current Program the K69 Transfer Case Control Module. Refer to «Control Module References»(/cadillac/ats/i-2012-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) . Verify none of the DTC's reset. If any of the DTC's reset, replace the K69 Transfer Case Control Module. Refer to «Control Module References»(/cadillac/ats/i-2012-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) If none of the DTC's reset All OK. If any of the DTC's are set as history
3. Visually inspect each connector terminal of the K69 Transfer Case Control Module connector for damage or corrosion. Repair as necessary.
4. Clear DTC P0601, DTC P0604, or DTC P062F from history.
5. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data. The DTC should not set. If any of the DTC's set Replace the K69 Transfer Case Control Module. Refer to «Control Module References»(/cadillac/ats/i-2012-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) . If none of the DTC's set
6. All OK.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for K69 Transfer Case Control Module replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The transfer case fluid temperature sensor is a thermistor. The transfer case control module supplies a 5-volt reference circuit and a low reference circuit to the sensor. When the transfer case fluid is cold, the sensor resistance is high and the transfer case control module senses a low signal voltage on the low reference circuit. As the transfer case fluid warms, the sensor resistance lowers and the transfer case control module senses higher voltage on the low reference circuit. The transfer case control module uses this information to modify all-wheel drive duty cycle.

1. Engine ON for at least 5 s.
2. System voltage is 8.5-18.0 V.
3. DTC P0641 runs continuously.

Transfer case oil temperature 5 V reference voltage NOT 4.875-5.125 V.

1. DTC P0641 is a type C DTC.
2. The transfer case fluid temperature will default to estimated values based on engine intake air temperature and transmission fluid temperature.
3. Failure record recorded.
4. The Service AWD indicator will NOT illuminate.

1. DTC P0641 is a type C DTC.
2. The transfer case control module clears an active DTC once the conditions for setting the DTC are no longer present.
3. A history DTC clears after 40 consecutive warm up cycles without a fault present.
4. All DTCs can be cleared using a scan tool.
5. Clearing DTCs will also clear failure records.

1. Check failure records for further information on the conditions present when this DTC set.
2. If the transfer case oil temperature sensor circuits are open, or have high resistance, the scan tool will indicate -40°C/-40°F.
3. If the transfer case oil temperature circuits are shorted to voltage, the scan tool will read 154°C/300°F.
4. This fault will likely not be noticed by the driver. However, you can address this fault by looking at the transfer case 5 V reference parameter on the scan tool. The voltage should never be below 4.875 volts or above 5.125 volts.
5. Once corrected, you must power down the K69 Transfer Case Control Module in order to clear this code.
6. The transfer case drain plug is a good source for ground.
7. EL-49742 harness is a good source for B+ and ground.

Schematic Reference

All-Wheel Drive Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Electrical Information Reference

1. «Circuit Testing»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Note. This fault will not likely be noticed by the driver.

1. Verify the scan tool transfer case 5 V Reference parameter remains between 4.875-5.125 V. If NOT 4.875-5.125 V Refer to Circuit/System Testing. If 4.875-5.125 V
2. Verify the scan tool transfer case 5 V Reference Circuit Status parameter displays OK. If the transfer case 5 V Reference Circuit Status parameter does NOT display OK Refer to Circuit/System Testing. If the transfer case 5 V Reference Circuit Status parameter does display OK
3. Verify DTC P0641 is only set as a history DTC. If the DTC is set as current Refer to Circuit/System Testing. If the DTC is set as history
4. Verify the integrity of each connector terminal of the K69 Transfer Case Control Module connector and the B109 Transfer Case Fluid Temperature Sensor connector for damage or corrosion. Repair as necessary.
5. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data. The DTC should not set. If the DTC sets Refer to Circuit/System Testing. If the DTC does not set
6. All OK.

1. Ignition OFF, disconnect the harness connector at the B109 Transfer Case Fluid Temperature Sensor.
2. Test for 4.875-5.125 V between the transfer case 5 V reference circuit terminal A, and ground. If less than 4.875 V Ignition OFF, disconnect the X1 harness connector at the K69 Transfer Case Control Module. Test for infinite resistance between the 5 V reference circuit, K69 Transfer Case Control Module X1 harness terminal 9, and body ground. If less than infinite resistance, repair the short to ground in the circuit. If infinite resistance Test for less than 2 ohms in the 5 V reference circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms Test for infinite resistance between the 5 V reference circuit, terminal 9, and all other pins of the K69 Transfer Case Control Module X1 harness connector. If less than infinite resistance, repair the shorted together condition in the affected circuits. If infinite resistance, replace the K69 Transfer Case Control Module and perform the Transfer Case Clutch Identifier Configuration/Reset Function. Refer to «Transfer Case Shift Control Module Scan Tool Information (BW 4474)»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-scan-tool-information-2-of-2__transfer-case-shift-control-module-scan) . If greater than 5.125 V Ignition OFF, disconnect the X1 harness connector at the K69 Transfer Case Control Module. Test for infinite resistance between the 5 V reference circuit, terminal 9, and all other pins of the K69 Transfer Case Control Module X1 harness connector. If less than infinite resistance, repair the shorted together condition in the affected circuits. If infinite resistance, replace the K69 Transfer Case Control Module and perform the Transfer Case Clutch Identifier Configuration/Reset Function. Refer to «Transfer Case Shift Control Module Scan Tool Information (BW 4474)»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-scan-tool-information-2-of-2__transfer-case-shift-control-module-scan) . If between 4.875-5.125 V
3. Test for 4.875-5.125 V between the transfer case 5 V reference circuit terminal A, and the low reference circuit terminal B. If less than 4.875 V Ignition OFF, disconnect the X1 harness connector at the K69 Transfer Case Control Module. Test for infinite resistance between the low reference circuit, K69 Transfer Case Control Module X1 harness terminal 1, and body ground. If less than infinite resistance, repair the short to ground in the circuit. If infinite resistance Test for less than 2 ohms in the low reference circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms Test for infinite resistance between the low reference circuit, terminal 1, and all other pins of the K69 Transfer Case Control Module X1 harness connector. If less than infinite resistance, repair the shorted together condition in the affected circuits. If infinite resistance, replace the K69 Transfer Case Control Module and perform the Transfer Case Clutch Identifier Configuration/Reset Function. Refer to «Transfer Case Shift Control Module Scan Tool Information (BW 4474)»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-scan-tool-information-2-of-2__transfer-case-shift-control-module-scan) . If greater than 5.125 V Ignition OFF, disconnect the X1 harness connector at the K69 Transfer Case Control Module. Test for infinite resistance between the low reference circuit, terminal 1, and all other pins of the K69 Transfer Case Control Module X1 harness connector. If less than infinite resistance, repair the shorted together condition in the affected circuits. If infinite resistance, replace the K69 Transfer Case Control Module and perform the Transfer Case Clutch Identifier Configuration/Reset Function. Refer to «Transfer Case Shift Control Module Scan Tool Information (BW 4474)»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-scan-tool-information-2-of-2__transfer-case-shift-control-module-scan) . If between 4.875-5.125 V
4. 5 V reference circuit, transfer case oil temperature sensor low reference circuit, and the transfer case control module OK.

B109 Transfer Case Fluid Temperature Sensor

1. Ignition ON, engine OFF.
2. Record the value from the Transfer Case Fluid Temperature Sensor parameter.
3. Ignition OFF, disconnect the X1 harness connector at the B109 Transfer Case Fluid Temperature Sensor.
4. Ignition ON, engine OFF.
5. Verify the scan tool Transfer Case Fluid Temperature Sensor parameter displays -40°C/-40°F. If the parameter does NOT display -40°C/-40°F Refer to Circuit/System Testing. If the parameter does display -40°C/-40°F
6. Using a fused jumper, jump the 5 V reference circuit terminal A to the low reference circuit terminal B at the B109 Transfer Case Fluid Temperature sensor connector.
7. Verify the scan tool Calculated Transfer Case Clutch Temperature parameter displays 154°C/300°F. If less than 154°C/300°F Refer to Circuit/System Testing. If greater than 154°C/300°F Refer to Circuit/System Testing. If 154°C/300°F
8. Test the resistance between the 5 V reference circuit, terminal A and the low reference circuit, terminal B. Refer to the Temperature Versus Resistance table below for the resistance values at various temperatures. If the resistance is outside the specified range Replace the B109 Transfer Case Fluid Temperature Sensor. If the resistance is within the specified range
9. B109 Transfer Case Fluid Temperature Sensor OK.

Temperature Versus Resistance

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Control Module References»(/cadillac/ats/i-2012-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for K69 Transfer Case Control Module replacement, setup, and programming
2. «Transfer Case Fluid Temperature Sensor Replacement»(/cadillac/ats/i-2012-2014/remont/transfer-case/#transfer-case-bw-4474)
3. «Transfer Case Shift Control Module Scan Tool Information (BW 4474)»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-scan-tool-information-2-of-2__transfer-case-shift-control-module-scan) for Transfer Case Clutch Identifier Configuration/Reset function information

Strategy Based Diagnostics

Review the system operation in order to familiarize yourself with the system functions. Refer to Transfer Case Description and Operation .

Visual/Physical Inspection

1. Inspect the easily accessible or visible system components for obvious damage, or for conditions which could cause the symptom.
2. Inspect the transfer case for the proper fluid. Refer to «Transfer Case Fluid Replacement»(/cadillac/ats/i-2012-2014/remont/transfer-case/#transfer-case-bw-4474) .

Symptom List

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

1. «No Correction for Slip in All-Wheel Drive Mode»(/cadillac/ats/i-2012-2014/remont/transfer-case/#transfer-case-bw-4474)
2. «Service All-Wheel Drive Indicator Always On»(/cadillac/ats/i-2012-2014/remont/transfer-case/#transfer-case-bw-4474)
3. «All-Wheel Drive Off Indicator Always On»(/cadillac/ats/i-2012-2014/remont/transfer-case/#transfer-case-bw-4474)
4. «Transfer Case Popping Noise»(/cadillac/ats/i-2012-2014/remont/transfer-case/#transfer-case-bw-4474__transfer-case-popping-noise)
5. «Transfer Case Whine or Rumble Noise»(/cadillac/ats/i-2012-2014/remont/transfer-case/#transfer-case-bw-4474__transfer-case-whine-or-rumble-noise)
6. «Transfer Case Clunk During Acceleration and Deceleration»(/cadillac/ats/i-2012-2014/remont/transfer-case/#transfer-case-bw-4474__transfer-case-clunk-during-acceleration-and)
7. «Transfer Case Leak Diagnosis»(/cadillac/ats/i-2012-2014/remont/transfer-case/#transfer-case-bw-4474__transfer-case-leak-diagnosis)

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

When transfer case is in AWD mode the transfer case control module monitors the front wheel speeds and the rear wheel speeds. When a noticeable difference between the front and rear is seen the transfer case control module sends a PWM voltage to the clutch coil so it can apply the clutch in order to correct a slip condition. The slip condition is the difference in speed between the front and rear axles. The module has a thermal model based system so when the slip correction can not be made when a high percentage PWM signal has been sent, it will disable the system temporarily to prevent damage to the clutches.

1. Erratic wheel speed sensors can cause this condition to occur. Monitor the wheel speeds using the transfer case scan tool data list.
2. Make sure system voltage is above 10.5 volts as Special Functions will not work correctly if the system is below this voltage.

Schematic Reference

All-Wheel Drive Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Electrical Information Reference

1. «Circuit Testing»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information.

1. Monitor the wheel speed sensors using the transfer case scan tool data list. If the wheel speeds are erratic or there is a large difference between front and rear then diagnose and repair as necessary. Check for EBCM DTCs as they have likely set for wheel speed performance.
2. While in a parking lot with a scan tool using transfer case special functions go to clutch coupling request and request 100%. Drive the vehicle while making sharp turns, if the vehicle binds on turns this indicates the system is working properly. If it does not bind on turns go to the next step.
3. If nothing is found with wheel speed performance then the clutches may be excessively worn. Refer to «Transfer Case Disassemble»(/cadillac/ats/i-2012-2014/remont/transfer-case/#transfer-case-bw-4474) .
4. Repair as necessary.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Transfer Case Disassemble

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

If the service indicator needs to be turned on the transfer case shift control module sends a signal via the serial data line to the BCM which then sends a message to the instrument panel asking the I/P to command the Service AWD indicator.

Schematic Reference

All-Wheel Drive Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Electrical Information Reference

1. «Circuit Testing»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information.

1. If the Service AWD indicator is on and there are no DTCs, using a scan tool check under transfer case data list to see if the transfer case shift control module is requesting the service AWD indicator. If the module will not communicate check the fuse for the transfer case as this would cause the transfer case control module to drop off the serial data line causing a service indicator.
2. If the fuse is good check the module power and grounds for proper connections as this could cause the same thing as a blown fuse.
3. If this checks OK, then check all other U codes that may be set against the transfer case shift control module such as I/P, BCM, PCM, and follow the proper U code diagnostic.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for TCSCM replacement, setup, and programming.

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

If the AWD OFF Indicator needs to be turned on the transfer case shift control module sends a signal via the serial data line to the BCM which then sends a message to the instrument panel asking the I/P to command the AWD OFF Indicator. The AWD OFF Indicator is turned on for three reasons, the transfer case has overheated, the transfer case has lost both rear wheel speeds and vehicle speed, the transfer case has lost the front wheel speeds.

Schematic Reference

All-Wheel Drive Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Electrical Information Reference

1. «Circuit Testing»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information.

1. Check for any transfer case DTCs and diagnose as necessary.
2. Check for any U codes which may indicate the reason why wheel speed or vehicle speeds are missing and diagnose as necessary using the U code diagnostics.
3. Using a scan tool under transfer case data list look at the transfer case oil temperature. If the temperature is at or above 135°C (275°F) determine that the vehicle is not being used beyond its design intent. If this is not the case then the overheat condition may be due to excessively slipping clutches. Allow the transfer case to cool and retest. If the condition persists then disassemble the transfer case and repair as necessary. If an overheating issue is not present go to the next step.
4. Check the ECM and EBCM for DTCs as these modules will likely have set DTCs due to faulty wheel or vehicle speeds. Follow the proper diagnostics and repair as necessary.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Transfer Case Disassemble

Transfer Case Popping Noise

Transfer Case Popping Noise

Transfer Case Whine or Rumble Noise

Transfer Case Whine or Rumble Noise

Transfer Case Clunk During Acceleration and Deceleration

Transfer Case Clunk During Acceleration and Deceleration

Transfer Case Leak Diagnosis

Transfer Case Leak Diagnosis

Removal Procedure

1. Raise and suitably support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/ats/i-2012-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
2. Reposition the underbody insulation as necessary to gain access to the fill plug.
3. Remove the fill plug (1).
4. Remove the drain plug (2). NOTE: Ensure that an approved drain pan is used when draining the transfer case.
5. Allow the transfer case to drain completely.

Installation Procedure

1. Apply sealant to the threads of the drain plug. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/cadillac/ats/i-2012-2014/remont/transfer-case/#transfer-case-bw-4474__adhesives-fluids-lubricants-and-sealers) .
2. Install the drain plug (2) and tighten to 25 (18 lb ft).
3. Fill the transfer case to the bottom of the fill plug hole. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/cadillac/ats/i-2012-2014/remont/transfer-case/#transfer-case-bw-4474__adhesives-fluids-lubricants-and-sealers) .
4. Apply sealant to the threads of the fill plug. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/cadillac/ats/i-2012-2014/remont/transfer-case/#transfer-case-bw-4474__adhesives-fluids-lubricants-and-sealers) .
5. Install the fill plug (1) and tighten to 15 (11 lb ft).
6. Lower the vehicle.

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/ats/i-2012-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
2. Remove the drain plug (2).

1. Apply sealant to the threads of the drain plug. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/cadillac/ats/i-2012-2014/remont/transfer-case/#transfer-case-bw-4474__adhesives-fluids-lubricants-and-sealers) .
2. Install the drain plug (2) and tighten to 25 (18 lb ft)
3. Fill to the transfer case with fluid. Refer to «Transfer Case Fluid Replacement»(/cadillac/ats/i-2012-2014/remont/transfer-case/#transfer-case-bw-4474) .
4. Lower the vehicle.

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/ats/i-2012-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
2. Remove the fill plug (1).

1. Fill the transfer case as necessary. Refer to «Transfer Case Fluid Replacement»(/cadillac/ats/i-2012-2014/remont/transfer-case/#transfer-case-bw-4474) .
2. Apply sealant to the threads of the fill plug. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/cadillac/ats/i-2012-2014/remont/transfer-case/#transfer-case-bw-4474__adhesives-fluids-lubricants-and-sealers) .
3. Install the fill plug (1) and tighten to 15 (11 lb ft).
4. Lower the vehicle.

Scheme 4

Transfer Case Fluid Temperature Sensor Replacement

1. Remove the right rear compartment side trim panel. Refer to «Rear Compartment Side Trim Replacement - Right Side (With AM9)»(/cadillac/ats/i-2012-2014/remont/exteriorinterior-trim/#interior-trim-and-interior-paneling) , «Rear Compartment Side Trim Replacement - Right Side (Except AM9)»(/cadillac/ats/i-2012-2014/remont/exteriorinterior-trim/#interior-trim-and-interior-paneling__rear-compartment-side-trim-replacement) .
2. Remove the electrical connectors from the transfer case shift control module.
3. Remove the transfer case shift control module (1) from the bracket.

1. Install the transfer case shift control module (1) to the bracket.
2. Install the electrical connectors to the transfer case shift control module.
3. Install the right rear compartment side trim panel. Refer to «Rear Compartment Side Trim Replacement - Right Side (With AM9)»(/cadillac/ats/i-2012-2014/remont/exteriorinterior-trim/#interior-trim-and-interior-paneling) , «Rear Compartment Side Trim Replacement - Right Side (Except AM9)»(/cadillac/ats/i-2012-2014/remont/exteriorinterior-trim/#interior-trim-and-interior-paneling__rear-compartment-side-trim-replacement) .
4. Refer to control module references for programming and setup. Refer to «Control Module References»(/cadillac/ats/i-2012-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) .

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/ats/i-2012-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
2. Drain the transfer case fluid, if necessary. Refer to «Transfer Case Fluid Replacement»(/cadillac/ats/i-2012-2014/remont/transfer-case/#transfer-case-bw-4474) .
3. Remove the front propeller shaft. Refer to «Front Axle Propeller Shaft Replacement»(/cadillac/ats/i-2012-2014/remont/driveshaft-universal-joints/#propeller-shaft) .
4. Remove the propeller shaft. Refer to «Two-Piece Propeller Shaft Replacement»(/cadillac/ats/i-2012-2014/remont/driveshaft-universal-joints/#propeller-shaft) .
5. Support the transmission with a suitable jack.
6. Disconnect the electrical connectors from the transfer case.
7. Remove the transmission support assembly (2) from the vehicle. Refer to «Transmission Support Replacement (Automatic AWD)»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
8. Using the jack, lower the transmission enough to access the rear transfer case mounting fasteners.
9. Using a suitable transmission jack, support the transfer case.
10. Using suitable straps or chains, secure the transfer case to the transmission jack.
11. Remove the four rear transfer case mounting fasteners (1).
12. Remove the three front transfer case mounting fasteners (1).
13. Lower the transfer case out of the vehicle.
14. Remove and DISCARD the vehicle wiring harness bracket located on the top of the transfer case assembly.

1. Install the NEW vehicle wiring harness bracket located on the top of the transfer case assembly.
2. Position the transfer case to the transmission.
3. Install the transfer case fasteners (1) and tighten to 50 (37 lb ft).
4. Install the transfer case fasteners (1) and tighten to 50 (37 lb ft).
5. Install the transmission support assembly. Refer to «Transmission Support Replacement (Automatic AWD)»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
6. Remove the transmission jack from the transfer case.
7. Remove the jack from under the transmission.
8. Connect the electrical connectors to the transfer case.
9. Connect the shift cable to the transmission control lever. Refer to «Range Selector Lever Cable Replacement»(/cadillac/ats/i-2012-2014/remont/automatic-trans/#automatic-transmission-6l45-mya-repair-instructions-on-vehicle) .
10. Install the front propeller shaft. Refer to «Front Axle Propeller Shaft Replacement»(/cadillac/ats/i-2012-2014/remont/driveshaft-universal-joints/#propeller-shaft) .
11. Install the propeller shaft. Refer to «Two-Piece Propeller Shaft Replacement»(/cadillac/ats/i-2012-2014/remont/driveshaft-universal-joints/#propeller-shaft) .
12. Refill the transfer case with fluid, if necessary. Refer to «Transfer Case Fluid Replacement»(/cadillac/ats/i-2012-2014/remont/transfer-case/#transfer-case-bw-4474) .
13. Lower the vehicle.
14. Reprogram the transfer case shift control module. Refer to «Control Module References»(/cadillac/ats/i-2012-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) .

Input Shaft Seal Replacement

Removal Procedure

1. Remove the transfer case. Refer to «Transfer Case Assembly Replacement»(/cadillac/ats/i-2012-2014/remont/transfer-case/#transfer-case-bw-4474) .
2. Remove the input shaft seal. Refer to input shaft seal removal in «Transfer Case Disassemble»(/cadillac/ats/i-2012-2014/remont/transfer-case/#transfer-case-bw-4474) .

Installation Procedure

1. Install the input shaft seal. Refer to input shaft seal installation in «Transfer Case Assemble»(/cadillac/ats/i-2012-2014/remont/transfer-case/#transfer-case-bw-4474) .
2. Install the transfer case. Refer to «Transfer Case Assembly Replacement»(/cadillac/ats/i-2012-2014/remont/transfer-case/#transfer-case-bw-4474) .

Rear Output Shaft Seal Replacement

Tools Required

1. J-41736 Bearing Installer
2. J-45012 Holding Fixture
3. J-45019 Flange and Pinion Cage Remover
4. DT-49861-A Seal Installer
5. For equivalent regional tools, refer to «Special Tools»(/cadillac/ats/i-2012-2014/remont/transfer-case/#transfer-case-bw-4474__special-tools) .

1. Raise and suitably support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/ats/i-2012-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
2. Remove the propeller shaft. Refer to «Two-Piece Propeller Shaft Replacement»(/cadillac/ats/i-2012-2014/remont/driveshaft-universal-joints/#propeller-shaft) .
3. Install the J-45012 Holding Fixture to the rear output shaft flange (4).
4. Remove the rear output shaft flange nut (1).
5. Remove the J-45012 Holding Fixture from the rear output shaft flange (4).
6. Remove the rear output shaft flange washer (2).
7. Remove and Discard the rear output shaft flange O-ring seal (3).
8. Install the J-45019 Flange and Pinion Cage Remover to the rear output shaft flange (4).
9. Remove the rear output shaft seal dirt deflector (5).
10. Remove and Discard the rear output shaft seal (6).

1. Install a NEW seal using DT-49861-A Seal Installer.
2. Install the rear output shaft seal dirt deflector (5) using J-41736 Bearing Installer.
3. Install the J-45012 Holding Fixture to the rear output shaft flange (4).
4. Install the NEW rear output shaft flange O-ring seal (3).
5. Remove the rear output shaft flange washer (2).
6. Install the rear output shaft flange nut (1) and tighten to 160 (118 lb ft)
7. Install the propeller shaft. Refer to «Two-Piece Propeller Shaft Replacement»(/cadillac/ats/i-2012-2014/remont/driveshaft-universal-joints/#propeller-shaft) .
8. Check the fluid level. Add fluid, if necessary. Refer to «Transfer Case Fluid Replacement»(/cadillac/ats/i-2012-2014/remont/transfer-case/#transfer-case-bw-4474) .
9. Lower the vehicle.

Front Output Shaft Seal Replacement

Tools Required

1. J-2619-A Slide Hammer w/Adapter
2. J-45019 Flange and Pinion Cage Remover
3. J-47847 Output Seal Installer
4. For equivalent regional tools, refer to «Special Tools»(/cadillac/ats/i-2012-2014/remont/transfer-case/#transfer-case-bw-4474__special-tools) .

1. Raise and suitably support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/ats/i-2012-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
2. Remove the front propeller shaft. Refer to «Front Axle Propeller Shaft Replacement»(/cadillac/ats/i-2012-2014/remont/driveshaft-universal-joints/#propeller-shaft) .
3. Remove the front output shaft (1) using J-2619-A Slide Hammer w/Adapter and J-45019 Flange and Pinion Cage Remover with three M8 x 1.25 mm bolts to retain the adapter to the flange of the shaft.
4. Remove and DISCARD the front output shaft retaining ring (2).
5. Remove the front output shaft seal dirt deflector (3).
6. Remove the front output shaft seal (4).

1. Install a NEW output shaft seal (4) using J-47847 Output Seal Installer.
2. Install the front output shaft seal dirt deflector (3).
3. Install a NEW front output shaft retaining ring (2) to the output shaft (1).
4. Using a rubber type mallet to install the output shaft (1) and to seat the retaining ring into the ID groove of the front output gear.
5. Install the front propeller shaft. Refer to «Front Axle Propeller Shaft Replacement»(/cadillac/ats/i-2012-2014/remont/driveshaft-universal-joints/#propeller-shaft) .
6. Check the fluid level. Add fluid, if necessary. Refer to «Transfer Case Fluid Replacement»(/cadillac/ats/i-2012-2014/remont/transfer-case/#transfer-case-bw-4474) .
7. Lower the vehicle.

Scheme 5

Oil Distribution Tube Replacement

Scheme 6

Transfer Case Vibration Dampener Replacement

Transfer Case Vibration Dampener Removal

Vibration Dampener Removal

Scheme 7

Transfer Case Holding Fixture Installation

Scheme 8

Front Output Shaft and Seal Removal

Scheme 9

Oil Drain Plug, Oil Fill Plug, and Fluid Temperature Sensor Removal

Scheme 10

Oil Delivery Tube and Oil Pump Removal

Scheme 11

Rear Output Shaft Flange and Seal Removal

Scheme 12

Vent and Adapter Studs Removal

Scheme 13

Rear Case Half Removal

Scheme 14

Two/Four Wheel Drive Clutch Coil Removal

Scheme 15

Oil Baffle, Oil Pump Screen, and Case Half Locating Pin Removal

Scheme 16

Idler Gear Rear Bearing Race and Front Output Shaft Rear Bearing Removal

Scheme 17

Rear Output Shaft Rear Bearing Removal

Scheme 18

Two/Four Wheel Drive Clutch Coil Housing Removal

Scheme 19

Armature and Front Drive Axle Clutch Assembly Removal

Scheme 20

Input Gear and Thrust Bearing Removal

Scheme 21

Idler Gear, Front Output Shaft Gear, and Oil Baffle Removal

Scheme 22

Input Shaft Removal

Scheme 23

Input Bearing Removal

Scheme 24

Front Output Shaft Front Bearing and Idler Gear Front Bearing Race Removal

Scheme 25

Input Shaft Seal Removal

Scheme 26

Transfer Case Front Drive Axle Viscous Clutch Disassemble

Scheme 27

Front and Rear Case Halves Cleaning and Inspection

Scheme 28

Input Shaft and Front Output Shaft Cleaning and Inspection

Scheme 29

Clutch Coil Assembly Cleaning and Inspection

Scheme 30

Clutch Components Cleaning and Inspection

Scheme 31

Transfer Case Front Drive Axle Viscous Clutch Assemble

Scheme 32

Front Output Shaft Front Bearing and Idler Gear Front Bearing Race Installation

Scheme 33

Input Shaft Seal Installation

Input Bearing Installation

Input Bearing Installation

Scheme 34

Input Shaft Installation

Scheme 35

Idler Gear, Front Output Shaft Gear, and Oil Baffle Installation

Scheme 36

Input Gear and Input Shaft Thrust Bearing Installation

Scheme 37

Armature and Front Drive Axle Clutch Assembly Installation

Scheme 38

Oil Distribution Hub and Two/Four Wheel Drive Clutch Coil Housing Installation

Scheme 39

Rear Output Shaft Rear Bearing Installation

Scheme 40

Idler Gear Rear Bearing Race and Front Output Shaft Rear Bearing Installation

Scheme 41

Oil Baffle, Oil Pump Screen, and Case Half Locating Pin Installation

Scheme 42

Two/Four Wheel Drive Clutch Coil Installation

Scheme 43

Oil Distribution Hub Installation

Scheme 44

Rear Case Half Installation

Scheme 45

Vent and Adapter Studs Installation

Scheme 46

Rear Output Shaft Seal Installation

Scheme 47

Rear Output Shaft Flange Installation

Scheme 48

Oil Delivery Tube and Oil Pump Installation

Scheme 49

Oil Fill Plug, Drain Plug, and Fluid Temperature Sensor Installation

Scheme 50

Front Output Shaft Seal Installation

Scheme 51

Front Output Shaft Installation

Transfer Case Holding Fixture Removal

Transfer Case Holding Fixture Removal

Scheme 52

Vibration Dampener Installation

Scheme 53

Four Wheel Drive Clutch Shim Selection

Scheme 54

The transfer case identification label (1) is located on the rear case half at left side of unit.

In situations where transfer case assembly replacement or repair has been performed and reprogramming of the TCCM is required, refer to Transfer Case Information Label .

Scheme 55

1. Broadcast Code
2. Transfer Case Control Module (TCCM) Clutch Calibration Identification
3. Borg Warner PN
4. GM PN
5. Production Date
6. Production Year
7. Barcode

Scheme 56

The Transfer Case Control Module (TCCM) calibration can be identified by the clutch calibration identification number (1) located on the transfer case assembly label. There are 9 variations of production TCCM programming.

1. In situations where the transfer case assembly is replaced, the TCCM is to be reprogrammed to the clutch calibration value (1 - 9) as indicated on the NEW transfer case assembly label.
2. In situations where the transfer case assembly is repaired and the clutch pack assembly has been replaced, reprogramming of the TCCM is required using the service calibration (variation 9). After completing TCCM re-calibration, the service calibration label (2) is to be installed onto the production label. The service calibration label is to be installed on top of the existing calibration identification. The service calibration label can be identified as having a red background color and the number 9 black in color.
3. In situations where only the TCCM is replaced, the TCCM needs to be reprogrammed to the correct clutch calibration value (1 - 9) as identified on the transfer case assembly label.

Scheme 57

The Borg Warner (BW) model 4474, transfer case is a 1-speed active design.

The BW 4474 transfer case allows vehicle speed dependent flexible clutch preload torque levels for enhanced system performance. An on-demand torque biasing friction clutch is tuned through software calibrations. When a driver enters a turn, clutch torque is decreased based on the various CAN inputs, such as steering angle, to prevent crowhop or driveline binding from occurring at low speeds. If the driver were to accelerate hard enough in a turn to induce rear wheel slip the transfer case would immediately correct it and then reduce torque to prevent crowhop or binding.

The system is fully automatic, requires no driver intervention, and has its own control module integrated with the vehicle chassis control system via the vehicle's CAN bus. The torque split between the front and rear axle is not fixed as in an open center differential transfer case meaning the active transfer case has the ability to transfer up to 100% of available torque to the front axle as needed.

The case halves are die-cast aluminum. Ball bearings support the input shaft and front output gear. Tapered bearings support the idler gear. Power from the input shaft is transferred to the front output shaft via a helical gear set. A gerotor type oil pump is driven by a shaft located into the end of the idler gear assembly. Oil is pulled from the sump through the filter and screen, pumped through the oil distribution hub, and into the input shaft oil gallery for the clutch and bearing lubrication.

Scheme 58

Torque is transferred to the front axle through an active wet clutch within the transfer case. The clutch pack is engaged by an electromagnetic clutch coil and ball ramp assembly . By varying the amount of current, torque output to the front axle can be adjusted.

Whenever the coil (1) is energized as determined by vehicle operating conditions and commanded by TCCM, the armature (7) in the clutch housing is magnetically drawn toward the rotor (2). Torque is generated through friction between the armature and rotor. Friction torque is multiplied through the ball (3) cam (4) mechanism and applied to the clutch pack (8). The clutch pack assembly contains a predetermined selectable pressure plate, friction, and reaction plates that are to be serviced as a clutch pack assembly. Clutch activation is controlled by a pulse width modulated voltage signal. If the clutch pack assembly is replaced, the TCCM must be recalibrated using the service calibration. Refer to Transfer Case Information Label .

External Components

Scheme 59

Scheme 60

Scheme 61

1. Front Output Flange
2. Vent
3. Input Shaft
4. Identification Label
5. Rear Output Flange
6. Oil Delivery Tube
7. Oil Drain Plug
8. Fluid Temperature Sensor
9. Two/Four Wheel Drive Inline Wiring Connector
10. Vibration Dampener - Model Dependent
11. Oil Fill Plug

Internal Components

Scheme 62

1. Front Output Flange
2. Front Output Shaft Gear
3. Oil Pump
4. Two/Four Wheel Drive Clutch Coil
5. Rear Output Flange
6. Front Drive Axle Clutch Assembly
7. Input Gear
8. Input Shaft
9. Idler Gear

New Product Information

The purpose of New Product Information is to document, important product changes which occur either model year-to-model year or interim model year.

Changes may include one or more of the following items

1. Specification Changes
2. New sealants and/or adhesives
3. Disassembly and assembly procedure revisions
4. Mechanical and diagnostic procedure revisions
5. New special tools required
6. Interim model year design changes
7. A component comparison from the previous model year

Scheme 63

Interim 2013 model year, a new design oil delivery tube was implemented into production. A first design tube (1) can be identified as not having the white plastic inspection caps. A second design tube (2) will include the white plastic inspection caps (3).

The second design tube (2) with inspection caps can be used to back-service on earlier assemblies. The tube caps are to be used as an inspection method to ensure the tube is properly and completely installed into the fittings.

Special Tools

Illustration Tool Number/Description DT-113-2-A DT-3289-20 KM-113-2 Bracket DT-8092 GE-8092 J-8092 Driver Handle DT-47847 Front Output Shaft Seal Installer DT-49308 Stud Remover / Installer DT-49861-A Seal Installer DT-50924 Clutch Pack Measurement Adapter DT-50978 Seal Sizer GE-2619-A J-2619-A Slide Hammer w / Adapter J-8001 Dial Indicator Set J-28431-6 Fluorescent Oil Dye - 6 1 oz J-29369-2 Bushing and Bearing Remover - 2-3 in J-36842 Transaxle Holding Fixture J-36850 Transjel Lubricant J-38412 Bearing Cup Installer J-41736 Bearing Installer J-42220 Universal 12V Leak Detection Lamp J-42738 Seal Installer J-45012 Holding Fixture J-45019 Flange and Pinion Cage Remover J-45124 Removal Bridge J-45124-9 Puller Leg J-45853 Rear Axle Bearing / Seal Installer

Scheme 64

Scheme 65

Scheme 66

Scheme 67

Scheme 68

Scheme 69

Scheme 70

Scheme 71

Scheme 72

Scheme 73

Scheme 74

Scheme 75

Scheme 76

Scheme 77

Scheme 78

See also:
• Diagnostic System Check - Vehicle
• Strategy Based Diagnosis
• Diagnostic Procedure Instructions
• COMPONENT CONNECTOR END VIEWS - INDEX
• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs
• Control Module References
• Transfer Case Shift Control Module Scan Tool Information (BW 4474)
• Diagnostic Repair Verification
• Diagnostic Trouble Code (DTC) List - Vehicle
• Charging System Test
• Power Mode Mismatch
• Symptoms - Propeller Shaft
• Front Wheel Drive Shaft Replacement - Right Side
• Front Wheel Drive Shaft Replacement - Left Side
• Rear Wheel Drive Shaft Replacement
• Symptoms - Front Drive Axle
• Symptoms - Rear Drive Axle
• Symptoms - Automatic Transmission
• Tire and Wheel Inspection
• Transfer Case Shift Control Module Programming and Setup (BW 4474)
• Lifting and Jacking the Vehicle
• Component Fastener Tightening Caution
• Fastener Caution
• Rear Compartment Side Trim Replacement - Right Side (With AM9)
• Rear Compartment Side Trim Replacement - Right Side (Except AM9)
• Transmission Support Replacement (Automatic AWD)
• Range Selector Lever Cable Replacement
• Machined Surface Damage Caution
• DTC C038C
• Transfer Case Popping Noise
• Transfer Case Whine or Rumble Noise
• Transfer Case Clunk During Acceleration and Deceleration
• Transfer Case Leak Diagnosis
• Special Tools
• Adhesives, Fluids, Lubricants, and Sealers
• Fastener Tightening Specifications
• New Product Information
• Spacer and Shim Specifications