Battery, Charging System and Starting System Cadillac CTS II

Description and Operation

Electrical Information Reference

«Circuit Testing»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Engine running, accessories OFF, measure and record the battery voltage at the battery terminals. The voltage should be between 12.6 and 15.0 V. If the battery voltage is not within the specified range, refer to «Charging System Test»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system)
Observe the appropriate module scan tool Battery Voltage parameters. Verify that the scan tool displays a value that is within 2 V of the battery terminal voltage.

Circuit/System Testing

Ignition OFF, disconnect the harness connectors of the appropriate control module.
Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5 ohms between the ground circuits listed below and ground. Terminal 8 X1 (AMP) Terminal 38 X1 (Radio) Terminal 10 X1 (HVAC) Terminal 17 (IPC) Terminal 7 X1 (RPA) Terminal 19 (SDM) Terminal D (PPS) Terminal S X1 (RCDLR EK2) Terminal 19 (TVM) Terminal 16 X2, Pedestrian impact detection module If greater than the specified range, test the ground circuit for an open/high resistance.
Verify that a test lamp illuminates between the B+ circuit terminals listed below and ground. Terminal 4 X1 (AMP) Terminal 44 X1 (Radio) Terminal 18 X1 (HVAC) Terminal 19 (IPC) Terminal 1 X1 (RPA) Terminal 9 (SDM) Terminal 17(SDM) Terminal A (PPS) Terminal H X1 (RCDLR EK2) Terminal 20 (TVM) Terminal 15 X2, Pedestrian impact detection module If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
If the circuits test normal, replace the appropriate control module.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for the appropriate control module replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
B+	B1424 00	B1424 00
Ground		B1424 00

The theft deterrent module (TDM) monitors the battery positive (B+) voltage available to it. If the voltage at the TDM is between 6-9 V, and the voltage being reported by a serial data message is greater than 9 V, then DTC B1424 00 sets.

The Ignition is in Accessory or Run
The diagnostic runs every 100 milliseconds.

Conditions for Setting the DTC

Voltage at the B+ circuit is between 6 and 9 V.
Reported battery voltage received via serial data is valid and is greater than 9 V.
The above conditions have been met for 2 seconds.

Security Indicator turns ON.
The driver information center (DIC) displays the SERVICE THEFT DETERRENT SYSTEM message.

This DTC passes when the battery voltage at the TDM is greater than 9 V, or if the voltage reported by serial data is less than 9 V.
A history DTC clears after 100 consecutive ignition cycles, if no failures are reported by this diagnostic.

A low voltage DTC in multiple modules indicates a concern in the charging system.

Schematic Reference

Immobilizer Schematics

Connector End View Reference

Immobilizer Description and Operation (without Y41) or Immobilizer Description and Operation (with Y41)

Description and Operation

Electrical Information Reference

«Circuit Testing»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Engine running, accessories OFF, measure and record the battery voltage at the battery terminals. The voltage should be between 12.6 and 15.0 V. If the battery voltage is not within the specified range, refer to «Charging System Test»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system)
Ignition OFF, disconnect the harness connector at the theft deterrent module (TDM).
Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5 ohms between the ground circuit terminal 3 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
Ignition ON, verify a test lamp illuminates between the B+ circuit terminal 1 and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
If the circuits test normal, replace the TDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for TDM replacement, set up, and programming

Perform the «Diagnostic System Check - Vehicle»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
5-Volt Reference	B1516 08	B1516 08
Signal	B1516 08	B1516 08	B1516 08	B1516 08, B1516 66
Low Reference		B1516 08

The battery current sensor is a 3-wire hall effect current sensor. The body control module (BCM) supplies 5 V and ground to the battery current sensor. The battery current sensor measures the amount of current flowing to or from the battery, and supplies a pulse width modulation (PWM) signal to the BCM. The BCM monitors the battery current signal, and sets DTC B1516 08 if the signal is outside the normal range if 4-96 percent duty cycle. The BCM also monitors the current polarity, and sets DTC B1516 66 if reverse polarity is detected.

B1516 08

The BCM is awake.

B1516 66

The BCM is awake.
The engine is OFF.

The battery current signal is less than 4 percent or greater than 96 percent duty cycle for 2 minutes.

The battery current polarity is positive for 2 minutes.

The regulated voltage control (RVC) is disabled.

The DTC passes when the battery current returns to the normal range for 15 seconds.

DTC B1516 08 could be set by overcharging with a battery charger or jump starting.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

B1516 08

Ignition OFF, disconnect the harness connector at the battery current sensor.
Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5 ohms between the low reference circuit terminal B and ground. If greater than specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the BCM.
Ignition ON, test for 4.8-5.2 V between the 5-volt reference circuit terminal A and ground. If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests, normal replace the BCM. If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests, normal replace the BCM.
Ignition ON, test for 4.8-5.2 V between the signal circuit terminal C and ground. If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM. If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the BCM.
If all circuits test normal, test or replace the battery current sensor.

B1516 66

Verify that the battery current sensor is installed securely around the negative battery cable, with the tape tab pointing away from the negative terminal on the battery. If the battery current sensor is not installed correctly, remove and reinstall the sensor properly.
Replace the battery current sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Battery Current Sensor Replacement»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) for current sensor replacement
«Control Module References»(/cadillac/cts/ii-2007-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance
B+	B1517 03, B1517 5A	B1517 03, B1517 5A
B+ high resolution	B1517 03, B1517 5A	B1517 03, B1517 5A
Ground		B1517 03, B1517 5A

The body control module (BCM) has designated circuits for monitoring vehicle system voltage. The BCM monitors the system voltage to ensure that the voltage stays within the proper range. Damage to components, and incorrect data may occur when the system voltage is out of range. The BCM monitors the system voltage over an extended length of time. If the BCM detects the system voltage is outside an expected range for the calibrated length of time, or the 2 BCM battery sense circuits differ by 2 V, DTC B1517 A will set.

The BCM has power and ground.
The ignition is not in the START position.

B1517 03

The battery voltage is less than 11 V.
The engine speed is greater than 1,100 RPM.
The above conditions are met for 15 seconds.

B1517 07

The battery voltage is greater than 16 V.
The engine speed is greater than 1,100 RPM.
The above conditions are met for 15 seconds.

B1517 5A

The battery voltage differs by 2 V on the BCM battery sense circuits for 10 seconds.

The instrument panel cluster (IPC) illuminates the charge indicator.
The driver information center (DIC) displays the SERVICE BATTERY CHARGING SYSTEM warning message.

The DTC will clear current status when fault is no longer present.
The history DTC will clear after 50 consecutive ignition cycles have occurred without a malfunction.

A high or low voltage DTC set in multiple modules indicates a concern in the charging system. Refer to «Charging System Test»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system)
This DTC may be set by overcharging with a battery charger, or jump by starting.
Inspect the ground connection G201, and ensure that it is clean and tight.

Schematic Reference

«Starting and Charging Schematics»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system)
«Body Control System Schematics»(/cadillac/cts/ii-2007-2014/remont/communication-devices/#data-communication-system)

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Engine running, accessories OFF, measure and record the voltage at the battery voltage at the battery terminals. The voltage should be between 12.6 and 15.0 V. If not within the specified range, refer to «Charging System Test»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system)
Observe the scan tool BCM Battery Voltage parameter. The reading should be between 12.6 and 15.0 V.

Ignition OFF, disconnect the harness connectors at the BCM.
Ignition OFF, test for less than 3.0 ohms between the ground circuit terminal 9 X4 and ground. If not within the specified range, test the ground circuit for an open/high resistance.
Ignition On, verify a test lamp illuminates between the B+ circuits listed below and ground. Terminal 3 X3 Terminal 10 X4 If the test lamp does not illuminate, test the B+ circuits for a short to ground or an open/high resistance.
If all the circuits test normal, test or replace the BCM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

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

Perform the «Diagnostic System Check - Vehicle»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The body control module (BCM) monitors the state of charge (SOC) of the electrical system. If the BCM senses that the SOC at ignition On is 30 percent lower than what it was when the engine was running.

The ignition must be in Accessory or Run mode for this code to set.

The SOC at ignition On is 30 percent lower than when the engine was running and battery drain is more than 2 amps.

There is no battery telltale illuminated or DIC message displayed.

The DTC will clear if the fault does not return after 50 consecutive ignition cycles.
The DTC will clear when run SOC is greater than or equal to 80 percent.

Schematic Reference

Connector End View Reference

Description and Operation

Park Brake System Schematics

Electrical Information Reference

«Circuit Testing»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, compare the scan tool Prev. State of Charge and Start Up State of Charge parameters. The scan tool readings should not differ by greater than 30 percent.

If the scan tool readings differ by greater than 30 percent, refer to «Battery Electrical Drain/Parasitic Load Test»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system)

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Perform the «Diagnostic System Check - Vehicle»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
B+	C0800 03	C0800 03
Ground		C0800 03

The electronic parking brake control module (EPB) monitors the system voltage circuit to determine if the voltage is within the normal operating range. When the EPB detects that the system voltage is below 9.2 V or above 16 V, the DTC C0800 sets.

Ignition is ON.
Engine ON.

C0800 03

The EPB detects that the system voltage is less than 9.2 V.
The above condition is present for 7 seconds.

C0800 07

The EPB detects that the system voltage is greater than 16 V.
The above condition is present for 7 seconds.

The Driver Information Center (DIC) displays the SERVICE PARKING BRAKE message.

The system voltage returns to normal operating range.

A high or low voltage DTC set in multiple modules indicates a concern in the charging system.
A possible cause of this DTC could be overcharging with a battery charger or jump starting.
A high or low voltage value in multiple modules indicates a concern in the charging system.

Schematic Reference

Connector End View Reference

Electronic Suspension Control Schematics

Electrical Information Reference

«Circuit Testing»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Engine running, measure and record the voltage at the battery terminals.
Verify that the battery voltage is 12.6-15.5 V. If the battery voltage is not within the specified range, refer to «Charging System Test»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system)

Ignition OFF, disconnect the harness connector at the electronic park brake module (EPB).
Ignition OFF, test for less than 3 ohms between the ground circuit terminal H and ground. If greater than the specified value, test the ground circuit for an open/high resistance.
Ignition ON, verify a test lamp illuminates between the B+ circuit terminal A and ground. If the test lamp does not illuminate, test the circuit for an open/high resistance.
If all circuits test normal, test or replace the EPB.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for EPB replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
B+	C0895	C0895
Ground		C0895

Voltage is supplied to the electronic suspension control (ESC) module through the battery positive voltage circuit. The ESC module monitors the supplied voltage to determine if it is within a valid operating range.

Ignition is ON.

The DTC is set when the battery voltage is outside the normal range of 9-15.5 V.

The electronic suspension control system (ECS) is disabled for the duration of the ignition cycle.
The TCS indicator illuminates on the IPC.
The DIC displays the Service Stability System message, if equipped.
Disable All Functionality

The DTC is saved as history when the ESC module no longer sees battery voltage outside the normal range of 9-15.5 V. The DTC will clear if the fault does not return after 50 consecutive ignition cycles.

A high or low voltage DTC set in multiple modules indicates a concern in the charging system.
A possible cause of this DTC could be overcharging with a battery charger or jump starting.
A high or low voltage value in multiple modules indicates a concern in the charging system.

Schematic Reference

Connector End View Reference

Electronic Suspension Control Description and Operation

Description and Operation

Electrical Information Reference

«Circuit Testing»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information.

Engine running measure and record the voltage at the battery terminals.
Verify that the battery voltage is 12.6-15.5 V. If the battery voltage is not within the specified range, refer to «Charging System Test»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system)
Engine running, observe the scan tool ESC Battery Positive Voltage parameter.
Verify that the scan tool displays a value that is within 2 V of the battery terminal voltage.

Ignition OFF, disconnect the harness connector at the ESC module.
Ignition OFF, test for less than 5 ohms between the ground circuit terminal 47 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
Ignition ON, verify a test lamp illuminates between the B+ circuit terminal 32 and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
If all circuits test normal, replace the ESC module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for ESC module replacement, setup and programming

Perform the «Diagnostic System Check - Vehicle»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
B+	C0899	C0899
Ground		C0899

The electronic brake control module (EBCM) monitors the ignition voltage level available for system operation. A low voltage condition prevents the system from operating properly.

ignition is ON.

This DTC will set if the B+ voltage to EBCM is less than 9 V for 100 msec.

The traction control system (TCS) and vehicle stability enhancement system (VSES) are disabled for the duration of the ignition cycle.
The ABS and TCS indicators illuminates on the IPC.
The brake warning indicator illuminates.
The driver information center (DIC) displays the SERVICE STABILITRAK/SERVICE TRACTION CONTROL message.

The condition for the DTC is no longer present.
The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

A low voltage DTC in multiple modules indicates a concern in the charging system
Inspect the ground connection G110 to ensure that it is clean and tight.

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

ABS Description and Operation

Description and Operation

Electrical Information Reference

«Circuit Testing»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information.

Engine running measure and record the voltage at the battery terminals. Verify that the battery voltage is 12.6-15.5 V. If not within the specified range, refer to «Charging System Test»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) .
Observe the scan tool EBCM Battery Voltage Signal parameter. The reading should be between 12.6 and 15.5 V.

Ignition OFF, disconnect the harness connector at the EBCM.
Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 10 ohms between the ground circuit terminals listed below and ground: Terminal 1 Terminal 25 If greater than the specified range, test the ground circuit for an open/high resistance.
Verify that a test lamp illuminates between the B+ circuit terminals listed below and ground: Terminal 13 Terminal 38 If the test lamp does not illuminate, test the B+ circuits for a short to ground or an open/high resistance.
If all circuits test normal, replace the EBCM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for EBCM replacement, setup and programming

Perform the «Diagnostic System Check - Vehicle»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
B+	C0899 00	C0899 00
Ground		C0899 00

The EBCM monitors the ignition voltage. If the voltage level is too high, damage may result in the system. When a high voltage condition is detected the EBCM turns OFF the system relay which removes battery voltage from the solenoid valves and pump motor.

The ignition is ON.

The system voltage is greater than 16 V for 100 msec.

Traction Control System (TCS) and Vehicle Stability Enhancement System (VSES) disabled for the duration of the ignition cycle.
ABS disabled if ignition voltage exceeds 19.5 V.
The TCS indicator turns ON.
The Antilock Brake System (ABS) indicator turns ON if voltage exceeds 19.5 V.
The driver information center (DIC) displays the SERVICE STABILITRAK/SERVICE TRACTION CONTROL message

The condition for the DTC is no longer present.
The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

A high voltage value in multiple modules indicates a concern in the charging system.
DTC C0900 could be set by overcharging with a battery charger or jump starting.
Inspect the ground connection G110 to ensure that it is clean and tight.

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

ABS Description and Operation

Description and Operation

Electrical Information Reference

«Circuit Testing»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information.

Engine running measure and record the voltage at the battery terminals. Verify that the battery voltage is 12.6-15.5 V If not within the specified range, refer to «Charging System Test»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system)
Engine running, observe the scan tool EBCM Battery Voltage Signal parameter. The reading should be between 12.6 and 15.5 V If not within the specified range, replace the EBCM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for EBCM replacement, setup and programming.

Perform the «Diagnostic System Check - Vehicle»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
B+	P0562	P0562
Ground		P0562

The following control modules monitor the system voltage to ensure that the voltage stays within the proper range

Engine control module
Fuel pump control module
Transmission control module

Damage to components, and incorrect data may occur when the voltage is out of range.

Engine Control Module

The engine is running.
The system voltage is between 9.5-18 V.

Fuel Pump Control Module

The engine is running.

Transmission Control Module

Engine speed is 1200 RPM or greater.
The system voltage is between 8.6-18 V.

The engine control module detects a system voltage below 10 V for 5 seconds.

Fuel Pump Control Module or Transmission Control Module

The module detects a system voltage below 9 V for 4 seconds.

DTC P0562 is a C type DTC.

Schematic Reference

«Engine Controls Schematics»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-wiring-schematic-diagrams) for the LSA engine
«Engine Controls Schematics (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-schematic-and-routing-diagrams) or «Engine Controls Schematics (LF1)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-schematic-and-routing-diagrams) for the LF1 and LLT engine
«Automatic Transmission Controls Schematics»(/cadillac/cts/ii-2007-2014/remont/automatic-trans/#automatic-transmission-6l456l506l806l90-wiring-schematics) for the MYA, MYB, and MYD transmission

Connector End View Reference

Description and Operation

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Electrical Information Reference

«Circuit Testing»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

Engine running, accessories OFF, measure and record the battery voltage at the battery terminals. The voltage should be between 12.6 and 15.0 V. If not within the specified range, refer to «Charging System Test»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) .
Observe the scan tool of the appropriate control module battery voltage parameters. Verify that the scan tool displays a value that is within 2 V of the battery terminal voltage.

Engine Control Module

Ignition OFF, disconnect the harness connectors at the ECM.
Ignition OFF, and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5 ohms between the ground circuit terminals listed below and ground: Terminal 73 X2 (LF1 or LSA) Terminal 73 X3 (LF1 or LSA) Terminal 1 X2 (LLT) Terminal 2 X2 (LLT) Terminal 4 X2 (LLT) If greater than the specified range, test the ground circuit for an open/high resistance.
Connect a 15 A fused jumper wire between B+ and the PWR/TRN relay switch control terminal 87. Ignition ON, verify that a test lamp illuminates between the IGN/B+ circuit terminals listed below and ground: Terminal 52 X1 (LF1) Terminal 70 X1 (LF1) Terminal 73 X1 (LF1) Terminal 3 X2 (LLT) Terminal 5 X2 (LLT) Terminal 6 X2 (LLT) Terminal 41 X2 (LLT) Terminal 56 X2 (LLT) Terminal 54 X2 (LLT) Terminal 19 X1 (LSA) Terminal 20 X1 (LSA) Terminal 13 X2 (LSA) Terminal 28 X2 (LSA) If the test lamp does not illuminate, test the IGN/B+ circuit for a short to ground or an open/high resistance.
If all circuits test normal, replace the ECM.

Fuel Pump Control Module

Ignition OFF, disconnect the harness connectors at the K27 fuel pump control module.
Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5 ohms between the ground circuit terminal 1 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
Verify that a test lamp illuminates between the IGN/B+ circuit terminals listed below and ground: Terminal 15 Terminal 17 Terminal 32 If the test lamp does not illuminate, test the IGN/B+ circuit for a short to ground or an open/high resistance.
If all circuits test normal, replace the K27 fuel pump control module.

Transmission Control Module

Ignition OFF, disconnect the harness connectors at the K71 transmission control module.
Ignition OFF, and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5 ohms between the ground circuit terminal 5 listed below and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
Ignition ON, verify that a test lamp illuminates between the IGN/B+ circuit terminals listed below and ground: Terminal 4 Terminal 9 Terminal 12 If the test lamp does not illuminate, test the IGN/B+ circuit for a short to ground or an open/high resistance.
If all circuits test normal, replace the K71 transmission control module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for the appropriate control module replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
B+	P0562	P0562
Ground		P0562

The following control modules monitor the system voltage to ensure that the voltage stays within the proper range

Engine control module
Fuel pump control module
Transmission control module

Damage to components, and incorrect data may occur when the voltage is out of range.

The vehicle speed is above 8 km/h (5 mph).
The system voltage is between 9.5-18 V.

The ignition is ON.

The system voltage is between 8.6-18.0 V.

The engine control module detects a system voltage above 16 V for less than 1 second.

The module detects the system voltage is greater than 18 V.

DTC P0563 is a C type DTC.

A possible cause of this DTC could be overcharging with a battery charger or jump starting.
A high voltage value in multiple modules indicates a concern in the charging system.

Schematic Reference

«Engine Controls Schematics»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-wiring-schematic-diagrams) for the LSA engine
«Engine Controls Schematics (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-schematic-and-routing-diagrams) or «Engine Controls Schematics (LF1)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-schematic-and-routing-diagrams) for the LF1 and LLT engine
«Automatic Transmission Controls Schematics»(/cadillac/cts/ii-2007-2014/remont/automatic-trans/#automatic-transmission-6l456l506l806l90-wiring-schematics) for the MH2 and MH4 transmission

Connector End View Reference

Description and Operation

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Electrical Information Reference

«Circuit Testing»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

Engine running, accessories OFF, measure and record the battery voltage at the battery terminals. The voltage should be between 12.6 and 15.0 V. If not within the specified range, refer to «Charging System Test»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) .
Engine running, observe the scan tool of the appropriate control module battery voltage parameters. Verify that the scan tool displays a value that is within 2 V of the battery terminal voltage. If not within the specified range, replace the appropriate control module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for the appropriate control module replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance
Control	P0615, P0616*	P0615, P0616*
Ground		P0615, P0616*
* LF1, LSA ** LLT

When the ignition switch is placed in the START position, a discrete signal is supplied to the body control module (BCM) notifying it that the ignition is in the START position. The BCM then sends a message to the engine control module (ECM) that crank has been requested. The ECM then verifies that the clutch pedal is depressed or the transmission is in Park/Neutral. If it is, the ECM then supplies 12 V to the control circuit of the starter relay. When this occurs, battery voltage is supplied through the switch of the starter relay to the starter solenoid.

The ignition is in the START position.
The system voltage is between 9.5-18 V.

The ECM detects improper voltage on the control circuit of the starter relay.

DTC P0615, P0616, and P0617 are C type DTCs.

Schematic Reference

Connector End View Reference

Description and Operation

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Electrical Information Reference

«Circuit Testing»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

Ignition OFF, disconnect the KR27 starter relay.
Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5.0 ohms between the relay ground circuit terminal 85 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
Ignition OFF, connect a test lamp between the control circuit terminal 86 and the ground circuit terminal 85.
With the transmission range selector in park or neutral, cycle the ignition between the OFF and CRANK position. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for short to voltage. If the circuit tests normal, replace the K20 ECM. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 ECM.
If all circuits tests normal, replace the KR27 starter relay.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Relay Replacement (Attached to Wire Harness)»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions) or «Relay Replacement (Within an Electrical Center)»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions)
«Control Module References»(/cadillac/cts/ii-2007-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
B+	P0622, P0625*	P0622, P0625*
Control	P0621	P0621	P0621
Signal	P0622, P0625*	P0622, P0625*	P0622, P0626*	P0622, P0625*
* LF1 or LS3 ** LLT

The engine control module (ECM) uses the generator turn ON control circuit to control the load of the generator on the engine. A high side driver in the ECM applies a voltage to the voltage regulator. This controls the voltage regulator to turn the field circuit ON and OFF. The ECM monitors the state of the generator turn ON control circuit. The ECM should detect low voltage on generator turn on control circuit when the ignition is ON and the engine is OFF, or when the charging system malfunctions. With the engine running, the ECM should detect high voltage on the generator turn on control circuit.

The ignition ON, engine OFF for ignition on test.
The engine is running for the run test.

During the ignition on test, the ECM detects voltage on the generator turn on control circuit for 5 seconds.
During the run test, the ECM detects low voltage on the generator turn on control circuit for 15 seconds.

DTC P0621 is a C type DTC.

Schematic Reference

Connector End View Reference

Description and Operation

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Electrical Information Reference

«Circuit Testing»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

LSA or LF1 Engine

Verify that a test lamp illuminates between the generator B+ and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
Ignition OFF, disconnect the X1 harness connector at the generator.
Ignition ON, test for 4.5-5.5 V between the control circuit terminal 1 and ground. If greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the ECM. If less than the specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal replace the ECM.
If the circuits test normal, replace the generator.

LLT Engine

Verify that a test lamp illuminates between the generator B+ X2 and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
Ignition OFF, disconnect the X1 harness connector at the generator.
Ignition ON, test for less than 1 V between the control circuit terminal 1 and ground. If greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the ECM.
Engine running, test for greater than 3.5 V between the control circuit terminal 1 and ground. If less than the specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal replace the ECM.
If the circuits test normal, replace the generator.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Generator Replacement (LF1/LLT)»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) or «Generator Replacement (LSA)»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system)
«Control Module References»(/cadillac/cts/ii-2007-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
B+		P0621
Control	P0621	P0621	P0621
Signal	P0622	P0622	P0622	P0622

The engine control module (ECM) uses the generator field duty cycle signal circuit, or F-terminal circuit, to monitor the duty cycle of the generator. The generator field duty cycle signal circuit connects to high side of the field windings in the generator. A pulse width modulated (PWM) high side driver in the voltage regulator turns the field windings ON and OFF. The ECM uses the PWM signal input to determine the generator load on the engine. This allows the ECM to adjust the idle speed to compensate for high electrical loads. The ECM monitors the status of the generator field duty cycle signal circuit. When the ignition is ON and the engine is OFF, the ECM should detect a duty cycle near 0 percent. When the engine is running, the duty cycle should be between 5-99 percent.

Ignition ON engine OFF, for the Ignition ON test.
Engine running, engine speed less than 3,000 RPM for the RUN test.

DTC P0621 is not set.
Ignition ON engine OFF, the ECM detects a PWM signal that is greater than 65 percent for 5 seconds.
Engine running, the ECM detects a PWM signal that is less than 5 percent for 15 seconds.

DTC P0622 is a C type DTC.

Schematic Reference

Connector End View Reference

Description and Operation

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Electrical Information Reference

«Circuit Testing»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

Engine running, observe the scan tool GEN-F Terminal Signal Circuit parameter. The GEN-F Terminal Signal Circuit parameter should display between 5-99 percent.

Verify that a test lamp illuminates between the G13 generator B+ terminal A X2 and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
Ignition OFF, disconnect the X1 harness connector at the G13 generator.
Ignition ON, verify the scan tool ECM GEN-F Terminal Signal parameter displays less than 5 percent. If greater than the specified range, test the signal circuit terminal 2 for a short to voltage. If the circuit tests normal, replace the K20 ECM.
Install a 3 A fused jumper wire between B+ and the signal circuit terminal 2.
Verify the scan tool ECM GEN-F Terminal Signal parameter displays greater than 95 percent. If less than the specified range, test the signal circuit terminal 2 for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 ECM.
If the circuit tests normal replace the G13 generator.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Generator Replacement (LF1/LLT)»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) or «Generator Replacement (LSA)»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system)
«Control Module References»(/cadillac/cts/ii-2007-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage
B+	P0625	P0625
Signal	P0625	P0625	P0626
Control	P0621	P0621	P0621

P0625

The engine is running.
The engine speed is less than 3000 RPM.

P0626

The engine is not running.
The ignition is in the ON position.

The ECM detects a pulse width modulated (PWM) signal less than 5 percent for 15 seconds.

The ECM detects a pulse width modulated (PWM) signal greater than 65 percent for 15 seconds.

DTC P0625 and P0626 are a C type DTCs.

Schematic Reference

Connector End View Reference

Description and Operation

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Electrical Information Reference

«Circuit Testing»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

Engine running, observe the scan tool GEN-F Terminal Signal parameter. The GEN-F Terminal Signal parameter should display between 5-99 percent.

Verify that a test lamp illuminates between the generator B+ output circuit X2 terminal B and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
Ignition OFF, disconnect the X1 harness connector at the generator.
Ignition ON, verify the scan tool ECM GEN-F Terminal Signal parameter displays less than 5 percent. If greater than the specified range, test the signal circuit terminal 2 for a short to voltage. If the circuit tests normal, replace the K20 ECM.
Install a 3 A fused jumper wire between B+ and the signal circuit.
Verify the scan tool ECM GEN-F Terminal Signal parameter displays greater than 95 percent. If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 ECM.
If the circuit tests normal replace the G13 generator.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Generator Replacement (LF1/LLT)»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) or «Generator Replacement (LSA)»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system)
«Control Module References»(/cadillac/cts/ii-2007-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup, and programming

Symptoms - Engine Electrical

IMPORTANT

The following steps must be completed before using the symptom tables.

Perform «Control Module References»(/cadillac/cts/ii-2007-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) before using the Symptom Tables in order to verify that all of the following are true: There are no DTCs set. The control modules can communicate via the serial data link.
Review the system descriptions and operations in order to familiarize yourself with the system functions. Refer to one of the following system operations: «Battery Description and Operation»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) «Charging System Description and Operation»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) «Electrical Power Management Description and Operation»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) «Starting System Description and Operation»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system__starting-system-description-and-operation)

Visual/Physical Inspection

Inspect for aftermarket devices which could affect the operation of the starting and charging systems. Refer to «Checking Aftermarket Accessories»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__checking-aftermarket-accessories) .
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

«Battery Inspection/Test»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system)
«Battery Electrical Drain/Parasitic Load Test»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system)
«Battery Common Causes of Malfunction»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system__battery-common-causes-of-malfunction)
«Charging System Test»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system)
«Generator Noise Diagnosis»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system)
«Starter Solenoid Does Not Click»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system)
«Starter Solenoid Clicks, Engine Does Not Crank»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system)
«Engine Cranks Slowly»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system)
«Starter Noise Diagnosis»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system)

WARNING

Refer to Battery Disconnect Warning .

Note. The battery test using the EL 42000: Battery Tester requires correct connections to the battery terminals. A failure to obtain the correct connections during the test may result in a failed test on a good battery. Use the Out of Vehicle test for each battery when testing a vehicle with dual batteries.

Follow these instructions in order to avoid an incorrect diagnosis because of connections

If testing the vehicle with the battery cables still connected, wiggle the EL 42000 clips on the terminal bolt. This may cut through any coating or through any oxidation that may be present on the bolt. Even new bolts contain a protective coating that may insulate or cause a resistance in the test circuit.
If correct connections to the battery terminal bolts in the vehicle are in doubt, perform the following steps: Disconnect the negative battery cable. Disconnect the positive battery cable. Install the test adapters on the terminals. Follow the instructions for testing a removed battery.
If the tester displays a REPLACE BATTERY or BAD CELL-REPLACE result for a battery tested in the vehicle with the battery cables connected, perform the following steps: Disconnect the negative battery cable. Disconnect the positive battery cable. Install the tester adapters. NOTE: Always write the test code displayed by the tester on the repair order for any warranty purposes. The number is a unique code that describes the test data for a particular battery at a particular time. The test code may occasionally repeat when you retest the same battery. More often, each test will result in a different code. Use the test code from the second, or Out of Vehicle test. Follow the instructions for testing a removed battery. Replace the battery only if the second test shows a REPLACE BATTERY or BAD CELL-REPLACE result. Use the test code from the second test for any warranty purposes.
Use the correct terminal adapters. Do not use any common bolts or a combination of bolts, of nuts, and of washers as adapters when testing the battery. Use the test adapters that are provided with the EL 42000 or GM P/N 12303040 terminal adapters. If the adapters that are provided with the EL 42000 require replacement, use GM P/N 12303040. Any other adapter may not contact the correct areas of the battery terminal, causing a resistance that may result in an invalid battery test result.

Schematic Reference

Connector End View Reference

Description and Operation

Control Module References

Electrical Information Reference

«Circuit Testing»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Special Tools

EL 42000: Battery Tester

For equivalent regional tools, refer to Special Tools .

WARNING

Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components. For Vehicles equipped with OnStar® (UE1) with Back Up Battery: The Back Up Battery is a redundant power supply to allow limited OnStar® functionality in the event of a main vehicle battery power disruption to the VCIM (OnStar®module). Do not disconnect the main vehicle battery or remove the OnStar® fuse with the ignition key in any position other than OFF. Retained accessory power (RAP) should be allowed to time out or be disabled (simply opening the driver door should disable RAP) before disconnecting power. Disconnecting power to the OnStar® module in any way while the ignition is On or with RAP activated may cause activation of the OnStar® Back-Up Battery (BUB) system and will discharge and permanently damage the back-up battery. Once the Back-Up Battery is activated it will stay on until it has completely discharged. The BUB is not rechargeable and once activated the BUB must be replaced.

Inspect the C1 battery for a cracked, broken, or damaged case, which may be indicated by battery acid leakage. If there is any apparent damage, replace the C1 battery.
Verify the cold cranking amperage and amp hour rating of the C1 battery to the original C1 battery or original equipment (OE) specification. Refer to «Battery Usage»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system__battery-usage) . If the C1 battery does not meet or exceed specifications, replace the C1 battery.
Verify that the C1 battery cables are clean and tight. The C1 battery terminal bolts should be torqued as specified in «Fastener Tightening Specifications»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system__fastener-tightening-specifications) . If the C1 battery cables need to be cleaned, clean as required and tighten as specified. If the C1 battery cables are damaged, replace then tighten as specified.
Install the EL 42000 and follow directions supplied by the tester. If the tester calls for charging the C1 battery, refer to «Battery Charging»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) .

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Battery Positive Cable Replacement»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system)
«Battery Negative Cable Replacement»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system)
«Battery Replacement»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system)

Special Tools

J 42000 Battery Tester. See Special Tools .

For best results, use an automatic taper-rate battery charger with a voltage capability of 16 volts.
The charging area should be well ventilated.
Do not charge a battery that appears to be frozen. Allow the battery to warm to room temperature and test it using the J 42000 before charging. See «Special Tools»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) .

Battery State of Charge

Note. Using voltage to determine the batteries state of charge (SOC) is only accurate after the battery has been at rest for 24 hours. This is enough time for the acid in each cell to equalize. If the battery has been charged or discharged in the past 24 hours, the battery SOC will only be an estimate.

The maintenance-free batteries SOC is estimated by reading the voltage of the battery across the battery terminals. Because the voltage is affected by current flow into or out of the battery, the engine must be stopped and all electrical loads turned OFF, including parasitic loads, when checking the voltage. The voltage can also be affected if the battery has just been charged or discharged, so it is important to consider what has happened to the battery in the time just before testing. Use the following procedure to determine the batteries SOC

Be sure all electrical loads are turned OFF.
Determine whether the battery has been used in a vehicle or charged within the past 12 hours. If the answer is no, the terminal voltage will be stabilized and no action is necessary before reading the voltage. Skip to step 3. If the answer is yes, terminal voltage will not be stabilized and you should wait 12 hours since the last time the battery was used.
Estimate the battery temperature by determining the average temperature to which the battery has been exposed for the past 12 hours.
Measure the battery voltage at the battery terminals. Refer to the following table to determine the SOC according to the estimated battery temperature

Battery Voltage	% Charge at 0°C (32°F)	% Charge at 25°C (75°F)
12.75 V	100%	100%
12.7 V	100%	90%
12.6 V	90%	75%
12.45 V	75%	65%
12.2 V	65%	45%
12.0 V	40%	20%

Use the SOC information as follows

A battery with a SOC that is below 65 percent must always be recharged before returning it to service or continuing storage.
A battery with a SOC that is 65 percent or greater is generally considered to be charged enough in order to be returned to normal service or in order to continue storage. However, if the battery is being used in slow traffic or with short drive times, or if the temperature is very hot or very cold, the battery should be fully charged, to at least 90 percent, before returning it to service or continuing storage.

Charging Time Required

The time required to charge a battery will vary depending upon the following factors

The battery charger capacity-The higher the charger amperage, the less time it will take to charge the battery.
The SOC of the battery-A completely discharged battery requires more than twice as much charging time as a half charged battery. In a discharged battery with a voltage below 11 volts, the battery has a very high internal resistance and may only accept a very low current at first. Later, as the charging current causes the acid content to increase in the electrolyte, the charging current will increase. Extremely discharged batteries may not activate the reversed voltage protection in some chargers. Refer to the manufacturer's instructions for operating this circuitry.
The temperature of the battery-The colder the battery is, the more time it takes to recharge the battery. The charging current accepted by a cold battery is very low at first. As the battery warms, the charging current will increase.

Charging Procedure

CAUTION

Turn OFF the ignition when connecting or disconnecting the battery cables, the battery charger or the jumper cables. Failure to do so may damage the ECM/PCM or other electronic components.

CAUTION

Refer to Fastener Caution .

When charging side-terminal batteries with the battery cables connected, connect the charger to the positive cable bolt and to a ground located away from the battery. When charging side-terminal batteries with the battery cables disconnected, install the battery side terminal adapters and connect the charger to the adapters.

Tighten: Tighten the battery side terminal adapters to 15 N.m (11 lb ft).

Use the following procedure to charge the battery

Turn OFF the charger.
Ensure that all of the battery terminal connections are clean and tight.
Connect the charger positive lead to the battery positive terminal on the battery or the remote jumper stud underhood.
Connect the negative charger lead to a solid engine ground or to a ground stud in the engine compartment that is connected directly to the battery negative terminal, but away from the battery. If the negative battery cable is disconnected and a terminal adapter is being used, connect directly to the adapter.
Turn ON the charger and set to the highest setting for normal charging.
Inspect the battery every half hour after starting the battery charger. Charge the battery until the taper-rate charger indicates that the battery is fully charged. Estimate the battery temperature by feeling the side of the battery. If it feels hot to the touch or its temperature is over 45°C (125°F), discontinue charging and allow the battery to cool before resuming charging.
After charging, test the battery. Refer to «Battery Inspection/Test»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) .

Perform the «Diagnostic System Check - Vehicle»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Components most likely to cause a parasitic draw on the vehicle's battery are switches, relays, and control modules. After the ignition is turned OFF the control modules will begin to go to sleep (shut OFF). All control modules do not go to sleep at the same time, some may take up to 30 minutes or longer after turning the ignition off before going to sleep, like the HVAC and body control modules. Others such as the ON Star and keyless entry control modules may periodically wake up then go back to sleep. These are all normal conditions.

Rule out any possible aftermarket equipment causing an unacceptable parasitic current drain. Aftermarket accessories installed into the courtesy lamp circuit can cause the inadvertent power timer in the body control module (BCM) to keep resetting. This would cause the BCM to remain awake and cause a current drain on the battery.
Rule out customer driving habits such as regular short trips that do not allow enough time to properly charge the battery. Refer to «Battery Description and Operation»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) .
Verify that the battery and charging system are in proper working order. Refer to «Battery Charging»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) and «Charging System Test»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) .
A battery discharging for no apparent reason while the vehicle is parked can be caused by an intermittent draw, such as a module waking up, or a continuous draw, such as a dome light or stuck relay.
Some systems and modules such as OnStar®, and regulated voltage control (RVC), if equipped, are designed to wake-up, perform a task, and go back asleep at regular intervals. Refer to «Body Control System Description and Operation»(/cadillac/cts/ii-2007-2014/remont/communication-devices/#data-communication-system__body-control-system-description-and-operation) for the system or modules description and operation.
An engine off natural vacuum evaporative test can occur if the engine control module (ECM) determines the drive cycle has met the appropriate criteria immediately after key off. The ECM will stay awake and the vent solenoid will stay energized for as long as 45 minutes. The typical current draw for this is about 1 A.
Digital OnStar gen 6 and later VCIMs do not "wake up" every 10 minutes for the first 48 hours as the gen 5 and prior. Gen 6 and later VCIM current draw is very low, less than 40 mA, so the OnStar system is left in that state for up to the first 48 hours. Parasitic draw of up to 40 mA with an occasional spike as high as 80 mA through the VCIM for the first 48 hours is normal.
Some automatic climate control systems can remain in a semi-awake state for up to three hours, actual draw amounts vary by vehicle platform but are typically not greater than 50 mA.
An extremely low mA current level is consumed by the RKE receiver for monitoring purposes, actual system wake up only occurs when the fobs for the vehicle are used. When other devices on the same RKE operating frequency are activated, such as the 4 tire pressure monitoring sensors and other vehicle FOB's in the vicinity, the RKE receiver will have a 100 mA spike. These spikes are normal and occur too briefly to have a significant effect on battery drain. Competing signals may cause RKE performance issues such as jamming but should not cause excessive battery draw.
If an excessive current draw is not present during initial testing, continue periodic testing over a 1-2 hour period to see if the current draw increases and stays above an unacceptable level.
The battery run down time will vary depending on the batteries reserve capacity. If the reserve capacity is higher, then the battery run down time would be longer. If the reserve capacity is lower, then the battery run down time would be shorter. The graph below indicates roughly how many days a 690 cold cranking amp battery with a 110 min. reserve capacity starting at 80 percent state of charge will last with a constant current draw until it reaches 50 percent state of charge. Differences in battery reserve capacity and temperature will affect the results.

Current Drain	Days
25 mA	33
50 mA	16.5
75 mA	11
100 mA	8.25
250 mA	3.3
500 mA	1.65
750 mA	1
1 A	0.8
2 A	0.4

Schematic Reference

Connector End View Reference

Electrical Information Reference

«Circuit Testing»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Connector Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Wiring Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Special Tools

EL 38758: Parasitic Draw Test Switch

For equivalent regional tools, refer to Special Tools .

Note. Most vehicle systems will go to sleep within 30 minutes but it can take up to 2 hours before all systems power down allowing the parasitic draw test to pass. An occasional increase in the parasitic draw is normal as long as it returns within 1 second. Closing the door latches/ajar switch while leaving the doors open is recommended, this allows the vehicle systems to perform in a "doors closed" mode while allowing vehicle interior access that may be needed to complete the diagnostic steps. Locking doors will arm the vehicle content theft deterrent system if equipped. Failure to arm the system may cause a theft system fault to not be present during testing. There are many things that can prevent the vehicle from completely going to sleep and passing the parasitic draw test. Make sure all the conditions listed below are met before performing the parasitic current draw test. Ignition OFF Key out of the ignition switch - when not equipped with keyless access and start Retained Accessory Power RAP OFF - open and close the driver door after ignition OFF Scan tool not communicating with a vehicle control module - in some cases it may need to be disconnected from the DLC All access doors closed Headlamps OFF - auto headlamps disabled Any delay lighting OFF If equipped with an under hood lamp disable it HVAC after blow OFF Any accessory that can work with ignition OFF inactive or OFF Wait up to 2 minutes or longer, after all other listed conditions are met

Using an Inductive Pickup Probe

Connect an inductive pickup probe to the negative battery cable that can read down to 1 mA.
Ignition OFF, as the vehicle systems shut down test for less than 30 mA of parasitic current drain. If greater than the specified range, refer to «Circuit/System Testing»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) .

Using the EL 38758 Parasitic Draw Test Switch

Ignition OFF, disconnect the battery negative cable from the battery. Refer to «Battery Negative Cable Disconnection and Connection (Sedan,Wagon)»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) .
Turn the EL 38758: switch knob to the OFF position.
Install the male end of the EL 38758: switch to the battery ground terminal.
Install the battery negative cable to the female end of the EL 38758: switch.
Turn the EL 38758: switch knob to the ON position.
Road test the vehicle and activate all of the accessories such as the radio and air conditioning.
Ignition OFF, connect a 10 A fused jumper wire to the test switch tool terminals.
Turn the EL 38758: switch knob to the OFF position. The current now flows through the jumper wire.
Check the fuse in the jumper wire. The fuse should be OK. If the jumper wire fuse is blown, refer to «Circuit/System Testing»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) .
Turn the EL 38758: switch knob to the ON position. Remove the fused jumper wire.
Connect a DMM set to the 10 A DC scale between the test switch tool terminals.
Turn the EL 38758: switch knob to the OFF position. The current now flows through the DMM.
As the vehicle systems shut down test for less than 30 mA of parasitic current drain. If greater than the specified range, refer to «Circuit/System Testing»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) .

Note. Removing or installing a fuse, relay, or connector, to determine the area causing high parasitic draw may wake up control modules. You must wait for the control modules to go back to sleep before retesting. It is best to install any removed or disconnected components after the diagnosis is completed. Fuses for power mode master components such as the BCM should be removed last to avoid misdiagnosis. If a scan tool is connected to the DLC, either disconnect it or subtract the scan tool current draw from the DMM reading to get the actual vehicle parasitic current draw.

If the vehicle has an unacceptable amount of parasitic current draw, remove each fuse one at a time until the current draw falls to an acceptable level. A drop of more than 10-20 mA, when disabling a single system or circuit, is an indication of an overly high current draw that could be causing the battery drain. Refer to Power Distribution Schematics to diagnose exactly which circuit of the suspect system is causing the high parasitic drain. The follow is a list of common components that could cause a high current draw

Stuck switch
Stuck relay
Control module

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for control module replacement, setup and programming

Battery Common Causes of Malfunction

A battery is not designed to last forever. With proper care, however, the battery will provide years of good service. If the battery tests good but still fails to perform well, the following are some of the more common causes

A vehicle accessory was left on overnight.
The driving speeds have been slow with frequent stops, stop-and-go driving, with many electrical accessories in use, particularly air conditioning, headlights, wipers, heated rear window, cellular telephone, etc.
The electrical load has exceeded the generator output, particularly with the addition of aftermarket equipment.
Existing conditions in the charging system, including the following possibilities: A slipping belt A bad generator
The battery has not been properly maintained, including a loose battery hold down or missing battery insulator if used.
There are mechanical conditions in the electrical system, such as a short or a pinched wire, attributing to power failure. Refer to «General Electrical Diagnosis»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures) .

Electrolyte Freezing

The freezing point of electrolyte depends on its specific gravity. A fully charged battery will not freeze until the ambient temperature gets below -54°C (-65°F). However, a battery with a low state of charge may freeze at temperatures as high as -7°C (20°F). Since freezing may ruin a battery, the battery should be protected against freezing by keeping it properly charged above 80 percent state of charge, the freezing point of the battery will be somewhere below -32°C (-25°F).

Battery Protection During Vehicle Storage

Certain devices on the vehicle maintain a small continuous current drain, parasitic load, on the battery. A battery that is not used for an extended period of time will discharge. Eventually permanent damage will result. Discharged batteries will also freeze in cold weather. Refer to Battery Inspection/Test .

In order to maintain the battery state of charge while storing the vehicle for more than 30 days

WARNING

Refer to Battery Disconnect Warning .

Disconnect the battery ground cable to protect the battery from discharge by parasitic current drains.

When the battery cannot be disconnected

Maintain a high state of charge.
Establish a regular schedule for recharging the battery every 20-45 days.

A battery that has remained in a discharged state for a long period of time is difficult to recharge or may be permanently damaged.

Perform the «Diagnostic System Check - Vehicle»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Description and Operation

Testing for Intermittent Conditions and Poor Connections

Electrical Information Reference

Engine ON, observe the charge indicator on the instrument panel cluster (IPC) or message in the driver information center (DIC). The charge indicator on the IPC should be turned OFF and the DIC should not display charging system message.

If the charge indicator is not on the IPC and a charging system message is not displayed on the DIC, refer to «Testing for Intermittent Conditions and Poor Connections»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor) .

If the charge indicator is on the IPC or a charging system message is displayed on the DIC, refer to «Circuit/System Testing»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) .

Ignition ON, verify that no generator or battery current sensor DTCs are set that would cause a charging system concern. If DTCs are set, refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) .
Ignition OFF, measure the voltage across the battery terminals. The voltage should read 12.0 volts or greater at room temperature. If not within specified value, refer to «Battery Inspection/Test»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) .
Connect a carbon pile tester to the battery.
Start the engine and increase the engine speed to 2,500 RPM. Observe the voltage reading on the tester. The voltage should read between 12.6-15.0 volts. If not within specified range, replace the generator.
Adjust the carbon pile tester to the specified load test output value, refer to «Generator Usage»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system__generator-usage) . If not within specified value, replace the generator.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Generator Replacement (LF1/LLT) or Generator Replacement (LSA)

Perform the «Diagnostic System Check - Vehicle»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Noise from a generator may be due to electrical or mechanical noise. Electrical noise or magnetic whine usually varies with the electrical load placed on the generator and is a normal operating characteristic of all generators. When diagnosing a noisy generator, it is important to remember that loose or misaligned components around the generator may transmit the noise into the passenger compartment and that replacing the generator may not solve the problem.

Start the engine, verify the noise can be heard. Compare the concern to a similar vehicle.
Inspect the generator, generator mounting, wiring harness, heater hoses, A/C lines or other accessory equipment that may be misrouted or be the cause of noise being transmitted into the passenger compartment.
Ignition OFF, remove the engine drive belt. Verify the generator, idler pulley and tensioner pulley spin freely. If any of the pulleys do not spin freely, replace the affected component.
Loosen all generator mounting bolts and ensure the generator is properly aligned. Tighten mounting bolts to specification, refer to «Generator Replacement (LF1/LLT)»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) or «Generator Replacement (LSA)»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) .

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Water Pump and Generator Belt Replacement»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-on-vehicle-1-of-2) for the 3.6L engine
«Drive Belt Replacement - Accessory»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-62l-repair-instructions-on-vehicle) for the 6.2L engine
«Drive Belt Tensioner Removal»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-off-vehicle-1-of-4__drive-belt-tensioner-removal) for the 3.6L engine
«Drive Belt Tensioner Replacement - Accessory»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-62l-repair-instructions-on-vehicle) for the 6.2L engine
«Drive Belt Idler Pulley Replacement»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-on-vehicle-1-of-2) for the 3.6L engine
«Generator Replacement (LF1/LLT)»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) or «Generator Replacement (LSA)»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system)

Perform the «Diagnostic System Check - Vehicle»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage
B+	1	1
Signal	2	1
Control Terminal 86		1	3
Control Terminal 87	1	1	3
Ground		1
1. Starter Solenoid Does Not Click 2. Cranks In Any Gear 3. Cranks All The Time

When the ignition mode switch is placed in the START position, a discrete signal is supplied to the body control module (BCM) notifying it that the ignition is in the START position. The BCM then sends a serial data message to the engine control module (ECM) that crank has been requested. The ECM then verifies that the clutch is fully depressed or the automatic transmission is in Park/Neutral. If it is, the ECM then supplies 12 V to the control circuit of the starter relay. When this occurs, battery voltage is supplied through the switch of the starter relay to the starter solenoid.

Schematic Reference

«Starting and Charging Schematics»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system)
«Automatic Transmission Controls Schematics»(/cadillac/cts/ii-2007-2014/remont/automatic-trans/#automatic-transmission-6l456l506l806l90-wiring-schematics)

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Automatic Transmission

Ignition ON, verify that no ignition, starter relay, brake pedal position sensor, theft deterrent, or automatic transmission DTCs are set that would cause the ECM to disable engine starting. If DTCs are set, refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) .
Ignition ON, observe the scan tool BCM 5 V Ignition Switch parameter. Place the ignition switch in the crank position, the parameter should display Crank Request. If not the specified value, refer to «Power Mode Description and Operation»(/cadillac/cts/ii-2007-2014/remont/body-electrical/#wiring-systems-and-power-management-description-and-operation) .
Transmission range selector in park, verify the scan tool ECM PNP Switch and TCM Internal Mode Switch parameter displays Park. If the TCM Internal Mode Switch parameter does not indicate Park. Refer to «Transmission Internal Mode Switch Logic»(/cadillac/cts/ii-2007-2014/remont/automatic-trans/#automatic-transmission-6l456l506l806l90-specifications__transmission-internal-mode-switch-logic) .
Transmission range selector in park or neutral attempt to start the vehicle. The crank relay should click and the engine should begin cranking. If the starter relay does not click or the engine does not crank, refer to «Circuit/System Testing»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) .

Manual Transmission

Ignition ON, verify that no ignition, starter relay, clutch pedal position sensor, brake pedal position sensor, or theft deterrent DTCs are set that would cause the ECM to disable engine starting. If DTCs are set, refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) .
Ignition ON, observe the scan tool BCM 5 V Ignition Switch parameter. Place the ignition switch in the crank position, the parameter should display Crank Request. If not the specified value, refer to «Power Mode Description and Operation»(/cadillac/cts/ii-2007-2014/remont/body-electrical/#wiring-systems-and-power-management-description-and-operation) .
Ignition ON, observe the scan tool ECM clutch pedal parameter, verify the scan tool parameter displays Applied / Released while depressing and releasing the clutch pedal. If the clutch pedal parameter does change. Refer to «Clutch Pedal Position Sensor Learn»(/cadillac/cts/ii-2007-2014/remont/manual-trans/#manual-transmission-tremec-6-speed__clutch-pedal-position-sensor-learn) for MG9 transmission and «Clutch Pedal Position Sensor Learn»(/cadillac/cts/ii-2007-2014/remont/manual-trans/#manual-transmission-aisin-ay6__clutch-pedal-position-sensor-learn) for MV7 transmission.
Clutch pedal fully depressed, attempt to start the vehicle. The crank relay should click and the engine should begin cranking. If the starter relay does not click or the engine does not crank, refer to «Circuit/System Testing»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) .

Ignition ON, with a scan tool verify the ECM Ignition 1 Signal parameter is greater than 10 V. If less than the specified range, test the ECM ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 ECM.
Ignition OFF, disconnect the starter relay.
Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5.0 ohms between the relay ground circuit terminal 85 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
Ignition ON, verify a test lamp illuminates between the B+ circuit terminal 30 and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the B+ circuit fuse is open, test the control circuit terminal 87 for a short to ground.
Ignition ON, verify that a test lamp does not illuminate between the control circuit terminal 87 and ground. If the test lamp illuminates, test the control circuit for a short to voltage.
Ensure the parking brake is applied and the transmission is in NEUTRAL on manual transmission or PARK on automatic transmissions. Momentarily install a 40 A fused jumper wire between the B+ circuit terminal 30 and the control circuit terminal 87. Verify the starter is activated. If the starter does not activate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the starter.
Connect a test lamp between the control circuit terminal 86 and the ground circuit terminal 85.
With the transmission range selector in park/neutral, or the clutch pedal fully applied, place the ignition switch between the OFF and CRANK position. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the ECM. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.
If all circuits test normal, test or replace the starter relay.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Manual Shift Shaft Position Switch Replacement»(/cadillac/cts/ii-2007-2014/remont/automatic-trans/#automatic-transmission-6l456l506l806l90-repair-instructions-on-vehicle)
«Relay Replacement (Attached to Wire Harness)»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions) or «Relay Replacement (Within an Electrical Center)»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions)
«Control Module References»(/cadillac/cts/ii-2007-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Ignition OFF, measure and record the battery voltage at the battery terminals. The voltage should be between 12.0-15.0 V. If not within the specified range, refer to «Battery Charging»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) .
Remove the drive belts. Refer to «Drive Belt Tensioner Removal»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-off-vehicle-1-of-4__drive-belt-tensioner-removal) or «Drive Belt Idler Pulley Replacement»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-on-vehicle-1-of-2) for the LF1 or LLT engine, «Drive Belt Tensioner Replacement - Accessory»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-62l-repair-instructions-on-vehicle) or «Drive Belt Replacement - Accessory»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-62l-repair-instructions-on-vehicle) for the LS3 engine.
Place the ignition switch to the CRANK position. If the engine cranks, inspect the engine and belt drive system for mechanical binding, seized engine, or seized generator, etc. If the engine does not crank, refer to «Engine Will Not Crank - Crankshaft Will Not Rotate»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-diagnostic-information-and-procedures__engine-will-not-crank-crankshaft) for the LF1 or LLT engine or «Engine Will Not Crank - Crankshaft Will Not Rotate»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-62l-diagnostic-information-and-procedures__engine-will-not-crank-crankshaft) for the LS3 engine.
Test for less than 0.5 V between the positive battery cable and terminal X1 at the starter motor as the ignition switch is placed to the START position. If greater than the specified value, replace the positive battery cable.
Test for less than 0.5 V between the negative battery cable and the starter motor case as the ignition switch is placed to the START position. If greater than the specified value, replace the negative battery cable.
If all circuits test normal, replace the starter motor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Battery Positive Cable Replacement»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system)
«Battery Negative Cable Replacement»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system)
«Starter Replacement (LF1/LLT)»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) or «Starter Replacement (LSA)»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system)

Perform the «Diagnostic System Check - Vehicle»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Schematic Reference

Connector End View Reference

Description and Operation