GM Service Manual Online
For 1990-2009 cars only

Object Number: 313527  Size: MF
Instrument Cluster and HUD Components
Cell 81: Driver Information and Head Up Display

Circuit Description

When you press the GAGE switch, circuit 1328 grounds. The instrument cluster detects the ground on terminal A9 and cycles the DIC display through the gauge messages.

Conditions for Setting the DTC

DTC B1523 sets under the following conditions:

    • The ignition is in RUN.
    • The GAGE switch is stuck or shorted to ground for greater than 60 seconds.

Action Taken When the DTC Sets

When DTC B1523 sets, one of the following actions occurs:

    • The instrument cluster disables the function of the GAGE switch for the remainder of that ignition cycle.
    • The DTC is set as a history DTC.
    • The instrument cluster displays the gauge message displayed when the condition was detected.

Diagnostic Aids

Test for a binding, sticking or broken GAGE switch. If the GAGE switch is OK, clear the DTC. Perform the System Check. If the DTC is set current again, refer to DTC B1523 GAGE Switch Stuck/Shorted To Ground diagnostic table.

Step

Action

Value(s)

Yes

No

1

  1. Connect a scan tool.
  2. Clear the DTC.
  3. Turn the ignition switch to OFF.
  4. Disconnect the switch.
  5. Turn the ignition switch to RUN.
  6. Wait for 60 seconds.
  7. Use a scan tool to test for DTC B1523.

Is the DTC present?

--

Go to Step 2

Go to Step 3

2

Repair the short to ground in CKT 1328.

Is the repair complete?

--

Go to Diagnostic System Check - Instrument Cluster

--

3

Test the resistance between terminal C and terminal H.

Is the resistance within the specified range?

0-5 ohms

Go to Step 4

Go to Intermittents and Poor Connections Diagnosis

4

Replace the DIC switch.

Is the repair complete?

--

Go to Diagnostic System Check - Instrument Cluster

--