2010 Cadillac CTS Sedan AWD V6-3.6L Page 713

2010 Cadillac CTS Sedan AWD V6-3.6L Page 713

The voltage seen by the transfer case control module is below 0.30 volts or above 0.70 volts for more than 5 seconds.

Action Taken When the DTC Sets

* The vehicle will be in 2WD mode while the fault is present.

* The SERVICE 4WD indicator remains illuminated for the remainder of the current ignition cycle.

Conditions for Clearing the DTC

* The TCCM clears the DTC if the condition for setting the DTC is not currently present.

* A history DTC clears after 40 consecutive warm up cycles without a fault present.

* All DTCs can be cleared using a scan tool.

* Clearing DTCs will also clear failure records.

Diagnostic Aids

* Check failure records for further information on the conditions present when this DTC set.

* Make sure system voltage is above 10.5 volts as Special Functions will not work correctly if the system is below this voltage.

* The TCCM comes preprogrammed and is not flashable.

Reference Information

Schematic Reference

Transfer Case Control Schematics (See: Transmission and Drivetrain/Transfer Case/Diagrams/Electrical Diagrams)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit

Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning)for scan tool information

Special Tools

J 35616 - GM-Approved Terminal Test Kit

Circuit/System Testing

1. Ignition OFF, disconnect the X1 connector at the TCCM. Test terminals 4 and 5 X1, harness side, for proper pin retention using J 35616-2A -

probe. Refer to Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector

Repairs). If both terminals test normal, reconnect the X1 connector at the TCCM.

Note: When test probing terminals, it is imperative to use the proper test probe from the most current version of the J 35616 - test kit. Using

the J 35616-35 - probe will deform the terminals in the TCCC connector.

2. Disconnect the X1 connector at the TCCC. Test terminals A and B X1, harness side, for proper pin retention using J 35616-4A. Refer to

Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs).

3. Ignition on. Using J 35616-4A - probe , connect a DMM between the clutch coil control circuit, pin A X1 TCCC, harness side, and a good

ground. Using the scan tool special functions, command the clutch control ON. The DMM should indicate battery voltage.

瀚慖f the DMM indicates less than battery voltage, test the clutch coil control circuit for an open, high resistance or short to ground. If the

circuit tests normal, replace the TCCM.

Note: There will be a diagnostic voltage of 2-4 volts present at all times, this does not indicate a short to voltage.

4. Using the scan tool special functions command the clutch control OFF. The DMM should indicate 2-4 volts.

瀚慖f the DMM indicates greater than 2-4 volts when it is commanded OFF, test the clutch coil control circuit for a short to voltage. If the

circuit tests normal, replace the TCCM.