GM Service Manual Online
For 1990-2009 cars only

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.

Diagnostic Aids

If the DTC is a history DTC, the problem may be intermittent. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Test Description

The number below refers to the step number on the diagnostic table.

  1. This step determines if the ignition  0 voltage circuit is open or shorted to ground.

Step

Action

Yes

No

Schematic Reference: Instrument Cluster Schematics

1

Did you perform the IPC Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Instrument Cluster

2

  1. Install a scan tool.
  2. Turn the ignition ON.
  3. With the scan tool, observe the Ignition 0 parameter in the IPC Inputs data list.

Does the scan tool display On?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

Test the ignition 0 voltage circuit for an open or a short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 6

Go to Step 4

4

Inspect for poor connections at the harness connector of the IPC. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 6

Go to Step 5

5

Important: Perform the compass calibration and variance procedure on the replacement IPC.

Replace the IPC. Refer to Instrument Cluster Replacement .

Did you complete the replacement?

Go to Step 6

--

6

  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC.

Does the DTC reset?

Go to Step 2

System OK