2010 Cadillac CTS Sedan AWD V6-3.6L Page 362

2010 Cadillac CTS Sedan AWD V6-3.6L Page 362

Connector End View Reference

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

Description and Operation

Power Mode Description and Operation (See: Power and Ground Distribution/Description and Operation/Power Mode Description and Operation)

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)

Scan Tool Reference

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

Circuit/System Verification

1. Verify that the following DTCs are not set: U1814, B1428.

瀚慖f either of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code

Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).

2. With a scan tool, access BCM, Power Mode data display list and compare all parameters listed with the corresponding ignition key position.

The PMM Power Mode Parameters table below illustrates the correct state of these input parameters in correspondence to the ignition switch

position. The circuits which the individual parameters are related to are in parentheses.

Circuit/System Testing

Important: You must perform the Circuit/System Verification before proceeding with Circuit/System Testing.

1. Connect a test lamp between each fuse test terminal of the ignition switch B+ circuit fuse and ground. The test lamp should illuminate.

瀚慖f the test lamp does not illuminate, test the circuits listed below for a short to ground. If all circuits test OK, replace the BCM.

* B+ terminal 2

* Ignition terminal 1

* Ignition terminal 3

* Ignition terminal 4

* Ignition, BCM terminal 19, X4

* Ignition, BCM terminal 21, X4

2. Disconnect the harness connector at the ignition switch.

3. Connect a test lamp between the B+ circuit terminal 2 and ground. The test lamp should illuminate.

瀚慖f the test lamp does not illuminate, test the B+ circuit for an open/high resistance.

Important: The ignition switch component test must be performed before proceeding with this test to verify the integrity of the

switch.

4. Perform the ignition switch component test. Verify the switch passes the test.

瀚慖f the ignition switch does not test normal, replace the ignition switch.

5. Disconnect the X1 harness connector at the BCM, test for less than 1.0 V between the circuit terminals of the BCM listed below and ground: