Pinpoint Test H: DTC U300A:01

Steering Column Switches

Pinpoint Tests

Pinpoint Test H: DTC U300A:01

Normal Operation

When the ignition switch is cycled to the OFF/LOCK position, from any other position, a monitoring cycle begins. The monitoring cycle checks that the voltage supplied to the Body Control Module (BCM) from the ignition switch through the run/acc, run/start and start circuits were delivered correctly for each ignition switch position.

- DTC U300A:01 (Ignition Switch: General Electrical Failure)-- sets if the voltage inputs to the BCM do not match the pre defined configurations for each ignition switch position.

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Ignition switch
- Circuit Deactivation Ignition Module (CDIM), if equipped

PINPOINT TEST H: DTC U300A:01

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H1 RETRIEVE THE RECORDED DTCs FROM THE BCM SELF-TEST

- Enter the following diagnostic mode on the scan tool: BCM Self-Test.
- Check for recorded DTCs from the BCM self-test.
- Is DTC U300A:01 the only DTC recorded?

Yes
For vehicles equipped with a CDIM, GO to H2.

For vehicles not equipped with a CDIM, GO to Pinpoint Test A. Pinpoint Test A: No Power in All Ignition Switch Positions

No
DIAGNOSE all other BCM DTCs before addressing DTC U300A:01. REFER to Body Control Module (BCM) DTC Chart.

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H2 RETRIEVE THE RECORDED DTCs FROM THE CDIM SELF-TEST

- Enter the following diagnostic mode on the scan tool: CDIM Self-Test.
- Check for recorded DTCs from the CDIM self-test.
- Are any CDIM DTCs present?

Yes
DIAGNOSE all CDIM DTCs before addressing BCM DTC U300A:01. REFER to the Circuit Deactivation Ignition Module (CDIM) DTC Chart. Circuit Deactivation Ignition Module (CDIM) DTC Chart

No
GO to Pinpoint Test A. Pinpoint Test A: No Power in All Ignition Switch Positions

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