Pinpoint Test D: No Power In START - Vehicles With an Ignition Switch

Steering Column Switches

Pinpoint Test D: No Power in START - Vehicles With an Ignition Switch

Normal Operation

When the ignition switch is turned to the START position, a voltage signal is sent to the Body Control Module (BCM) and the PCM. The BCM (Body Control Module) sends out a voltage signal to various modules to indicate a start event and the PCM checks various inputs and bus messages in an effort to start the vehicle.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Ignition switch

PINPOINT TEST D : NO POWER IN START - VEHICLES WITH AN IGNITION SWITCH

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

D1 CHECK FOR VOLTAGE TO THE BCM (Body Control Module) AND PCM

- Ignition OFF.

- Disconnect: BCM (Body Control Module) C2280B.

- Disconnect: PCM C175B.

- With the ignition switch to the START position, measure the voltage between ground and:
- BCM (Body Control Module) C2280B-47, circuit CDC35 (BU/WH), harness side.

- PCM C175B-16, circuit CDC35 (BU/WH), harness side.






Are the voltages greater than 10 volts?

Yes
GO to D2.

No
REPAIR circuit CDC35 (BU/WH). TEST the system for normal operation.

D2 CHECK THE IGNITION START CIRCUIT FOR AN OPEN

- Ignition OFF.

- Disconnect: Ignition Switch C250.

- Measure the resistance between ignition switch C250-7, circuit CDC35 (BU/WH), harness side and:
- BCM (Body Control Module) C2280B-47, circuit CDC35 (BU/WH), harness side.

- PCM C175B-16, circuit CDC35 (BU/WH), harness side.






Are the resistances less than 5 ohms?

Yes
INSTALL a new ignition switch. REFER to Ignition Switch Service and Repair. TEST the system for normal operation.

No
REPAIR circuit CDC35 (BU/WH). TEST the system for normal operation.