GM Service Manual Online
For 1990-2009 cars only

Diagnostic Instructions

    • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    • Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    •  Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC B1369: Device Ignition 0 (UNLOCK, ON, and START) Circuit Open

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

Ignition 0 Voltage Circuit

B1369

B1369

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Circuit Description

The instrument panel cluster (IPC) monitors the ignition 0 voltage circuit when the ignition switch is in either the ON position or the OFF position. If the IPC senses that the ignition 0 voltage circuit is low for greater than 3 seconds, DTC B1369 is set.

Conditions for Running the DTC

    • The ignition switch is ON.
    • At least 3 seconds has elapsed since the ignition switch was cycled ON.

Conditions for Setting the DTC

The ignition 0 input is low during power up or while in RUN for greater than 3 seconds.

Action Taken When the DTC Sets

    • The IPC stores DTC B1369 in memory.
    • The IPC will store conditions which were present when the DTC set as Failure Records data only. The information will not be stored as Freeze Frame data.

Conditions for Clearing the DTC

    • A current DTC B1369 will clear when the malfunction is no longer present and the ignition switch is cycled.
    • A history DTC B1369 will be cleared after 100 ignition cycles with no current codes active during the 100 ignition cycles.
    • The IPC receives the clear code command from the scan tool.

Reference Information

Schematic Reference

Audible Warnings Schematics

Connector End View Reference

Displays and Gages Connector End Views

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

Scan Tool Reference

Scan Tool Data List

Circuit/System Testing

  1. Ignition ON, engine OFF, verify the scan tool Ignition 0 parameter displays On.
  2. If not On, test the ignition 0 voltage circuit for an open/high resistance or a short to ground. If the circuit tests normal, replace the IPC.
  3. If all circuits test normal, replace the IPC.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for IPC replacement, setup, and programming