GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2006 🢒 Allure 🢒 DTC 🢒 DTC B0934

Circuit Description

The internal fault detection of the electronic compass module is handled by the instrument panel cluster (IPC). The compass information is sent to the IPC via 2 discreet wire inputs from the electronic compass module. The IPC displays compass information in the driver information center (DIC). The IPC sets DTC B0934 when either compass sensor circuit is shorted to battery.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC B0934 Compass Sensor Circuit High

Conditions for Running the DTC

The instrument panel cluster (IPC) monitors the analog input value once every ignition cycle at power up.

Conditions for Setting the DTC

The IPC detects that either compass input circuits is shorted to battery.

Action Taken When the DTC Sets

The DTC will be set and stored in non-volatile memory.

Conditions for Clearing the DTC
    • The DTC will become history when a power cycle has been performed and the fault is not detected by the IPC.
    • A history DTC will clear after 100 fault-free ignition cycles.
    • A scan tool may be used to clear the DTC.

Step

Action

Yes

No

Schematic Reference: Instrument Cluster Schematics or Driver Information System Schematics

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2
  1. Turn OFF the ignition.
  2. Disconnect the compass module.
  3. Connect a test light between the compass sensor circuit and a good ground.
  4. Turn ON the ignition.

Does the test light illuminate?

Go to Step 4

Go to Step 3

3
  1. Turn OFF the ignition.
  2. Connect a test light between the compass sensor return circuit and a good ground.
  3. Turn ON the ignition.

Does the test light illuminate?

Go to Step 5

Go to Step 7

4

Test the compass sensor circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 10

Go to Step 5

5

Test the compass sensor return circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 10

Go to Step 6

6

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

Did you find and correct the condition?

Go to Step 10

Go to Step 8

7

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

Did you find and correct the condition?

Go to Step 10

Go to Step 9

8

Replace the IPC. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 10

--

9

Replace the electronic compass module. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming..

Did you complete the replacement?

Go to Step 10

--

10
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.

Does the DTC reset?

Go to Step 2

System OK