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 number below refers to the step number on the diagnostic table.
- 3: This step tests for a short to battery positive on the Passlock™ battery voltage circuit.
DTC B2948
| Step | Action | 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 |
|
Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections |
| 3 |
IMPORTANT:
The use of a DMM is crucial in this step because voltage may be measured for 10 milliseconds.
|
Go to Step 7 | Go to Step 4 |
| 4 | Test the Passlock™ battery voltage circuit for a short to voltage. 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 | Inspect for poor connections at the Passlock™ sensor. Refer to Testing for Intermittent Conditions and Poor Connections
. Did you find and correct the condition? |
Go to Step 10 | Go to Step 8 |
| 7 | Replace the BCM. Refer to Control Module References
for replacement, setup, and programming. Did you complete the replacement? |
Go to Step 10 | - |
| 8 | Replace the Passlock™ sensor. Refer to Ignition Lock Cylinder Case Replacement
. Did you complete the replacement? |
Go to Step 9 | - |
| 9 | Perform the Passlock™ learn procedure. Refer to Programming Theft Deterrent System Components . Did you complete the repair? |
Go to Step 10 | - |
| 10 |
|
Go to Step 3 | System OK |