GM Service Manual Online
For 1990-2009 cars only

Object Number: 355197  Size: LF
Instrument Cluster Components
Instrument Cluster: Analog Schematics
Power Distribution Schematics

Circuit Description

The IP cluster monitors the crank signal input circuit in order to determine when the engine is cranking.

Conditions for Setting the DTC

The IP cluster crank signal input circuit remains high for 60 seconds.

Action Taken When the DTC Sets

The IPC will set a DTC if CKT 1035 remains high for more than 60 seconds.

Conditions for Clearing the MIL/DTC

    • A history DTC will clear after 100 consecutive fault free ignition cycles.
    • History and current DTC(s) can be cleared by using a scan tool.

Diagnostic Aids

  1. An intermittent problem may be caused by an intermittent short to B+ voltage on CKT 1035.
  2. Inspect the IPC connector terminal A5. Determine if terminal A5 is and shorted to B+ voltage.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. This step inspects for a short to B+ voltage on CKT 1035. The CKT 1035 should be low when the ignition switch is turned to the RUN position and the engine is not OFF.

Step

Action

Value(s)

Yes

No

1

Was the IPC Diagnostic System Check performed?

--

Go to Step 2

Go to Diagnostic System Check - Instrument Cluster

2

  1. Backprobe CKT 1035 at terminal A5 on the IPC with a DVOM.
  2. Turn the ignition switch to the RUN position.
  3. Do not start the engine.

Does the DVOM measure the B+ voltage?

9-14  VDC

Go to Step 6

Go to Step 3

3

Inspect the intermittent short to B+ voltage in CKT 1035 using the diagnostic aids.

Was the intermittent short to B+ voltage found?

--

Go to Step 6

Go to Step 4

4

  1. Clear the IPC DTC using a scan tool. Refer to Clearing DTCs.
  2. Cycle the ignition switch to the LOCK position.
  3. Turn the ignition switch back to the RUN position.

Did the IPC set B0860 DTC?

--

Go to Step 5

Go to Diagnostic System Check - Instrument Cluster

5

Replace the IPC. Refer to Instrument Cluster Replacement .

Is the repair complete?

--

Go to Diagnostic System Check - Instrument Cluster

--

6

Repair the short to B+ voltage on CKT 1035.

Is the repair complete?

--

Go to Step 7

--

7

Clear the IPC DTC(s) using a scan tool. Refer to Clearing DTCs.

Is the repair complete?

--

Go to Diagnostic System Check - Instrument Cluster

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