Test Description
WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
The numbers below refer to the step numbers on the diagnostic table.
- 3: This step tests for proper operation of the circuit in the high voltage range.
- 4: This step tests for a short to ground in the Passlock™ sensor signal circuit.
DTC B2957
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Immobilizer Schematics Connector End View Reference: Immobilizer Connector End Views |
||||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | - | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 |
|
0.4-4.9 V | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
| 3 |
|
4.9 V | Go to Step 7 | Go to Step 4 |
| 4 | Test the Passlock™ sensor signal circuit for a short to ground. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
- | Go to Step 10 | Go to Step 5 |
| 5 | Inspect for poor connections at the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
- | Go to Step 10 | Go to Step 6 |
| 6 | Replace the BCM. Refer to Control Module References
for replacement, setup, and programming. Did you complete the replacement? |
- | Go to Step 10 | - |
| 7 | Inspect for poor connections at the Passlock™ sensor. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
- | Go to Step 10 | Go to Step 8 |
| 8 | Replace the Passlock™ sensor in the ignition lock cylinder case. Refer to Ignition Lock Cylinder Case Replacement
. Did you complete the replacement? |
- | Go to Step 9 | - |
| 9 | Perform the Programming Theft Deterrent System Components procedure. Is the repair complete? |
- | Go to Step 10 | - |
| 10 |
|
- | Go to Step 3 | System OK |