B1355

Steering Column Switches

Pinpoint Test F: DTCs B1355 and B1359



Normal Operation

The Circuit Deactivation Ignition Module (CDIM) receives run circuit information from the ignition switch and provides a run/acc output to the Body Control Module (BCM). The CDIM (Circuit Deactivation Ignition Module) has microprocessors that continually monitor these inputs and outputs. The applicable DTC sets if a circuit failure is detected.

- DTC B1355 (Ignition Run Circuit Failure)- sets if the CDIM (Circuit Deactivation Ignition Module) determines that the input circuit from the ignition switch is open or shorted to ground during normal operation.

- DTC B1359 (Ignition Run/Acc Circuit Failure)- sets if the CDIM (Circuit Deactivation Ignition Module) determines that the output circuit to the BCM (Body Control Module) is open or shorted to ground during normal operation.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Ignition switch

- CDIM (Circuit Deactivation Ignition Module)

PINPOINT TEST F : DTCs B1355 AND B1359

NOTICE: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multi-meter probes.

F1 CHECK THE IGNITION SWITCH

- Ignition OFF.

- Carry out the Ignition Switch Component Test. Component Tests and General Diagnostics

Is the ignition switch OK?

Yes
For DTC B1355, GO to F2.

For DTC B1359, GO to F4.

No
INSTALL a new ignition switch. REFER to Ignition Switch . CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

F2 CHECK THE CDIM (Circuit Deactivation Ignition Module) RUN/ACC INPUT CIRCUIT FOR AN OPEN

- Disconnect: Ignition Switch C250.

- Disconnect: CDIM (Circuit Deactivation Ignition Module) C2500.

- Measure the resistance between ignition switch C250-6, circuit CDC33 (VT/GN), harness side and CDIM (Circuit Deactivation Ignition Module) C2500-1, circuit CDC33 (VT/GN), harness side.





Is the resistance less than 5 ohms?

Yes
GO to F3.

No
REPAIR circuit CDC33 (VT/GN). CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

F3 CHECK THE CDIM (Circuit Deactivation Ignition Module) RUN/ACC INPUT CIRCUIT FOR A SHORT TO GROUND

- Disconnect: BCM (Body Control Module) C2280A.

- Measure the resistance between ignition switch C250-6, circuit CDC33 (VT/GN), harness side and ground.





Is the resistance greater than 10,000 ohms?

Yes
GO to F6.

No
REPAIR circuit CDC33 (VT/GN). CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

F4 CHECK THE CDIM (Circuit Deactivation Ignition Module) RUN/ACC OUTPUT CIRCUIT FOR AN OPEN

- Ignition OFF.

- Disconnect: CDIM (Circuit Deactivation Ignition Module) C2500.

- Disconnect: BCM (Body Control Module) C2280B.

- Measure the resistance between CDIM (Circuit Deactivation Ignition Module) C2500-8, circuit CDC63 (YE/OG), harness side and BCM (Body Control Module) C2280B-35, circuit CDC32 (BN/YE), harness side.





Is the resistance less than 5 ohms?

Yes
GO to F5.

No
REPAIR circuit CDC63 (YE/OG). CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

F5 CHECK THE CDIM (Circuit Deactivation Ignition Module) RUN/ACC OUTPUT CIRCUIT FOR A SHORT TO GROUND

- Measure the resistance between CDIM (Circuit Deactivation Ignition Module) C2500-8, circuit CDC63 (YE/OG), harness side and ground.





Is the resistance greater than 10,000 ohms?

Yes
GO to F6.

No
REPAIR circuit CDC63 (YE/OG). CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

F6 CHECK THE CDIM (Circuit Deactivation Ignition Module) CONNECTOR

- Check the CDIM (Circuit Deactivation Ignition Module) connector for:
- corrosion

- damaged pins

- pushed-out pins


- Repair any identified concerns.

- Connect the ignition switch connector and make sure it seats correctly.

- Clear the DTCs.

- Enter the following diagnostic mode on the scan tool: CDIM (Circuit Deactivation Ignition Module) Self-Test.

Is DTC B1355 or B1359 still present?

Yes
INSTALL a new CDIM (Circuit Deactivation Ignition Module). REFER to Circuit Deactivation Ignition Module (CDIM) . TEST the system for normal operation.

No
The system is operating correctly at this time. The concern may have been caused by a poor or intermittent connection.