Diagnostic Test
DTC B2964 Diagnostic Table
| Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Schematic Wiring Diagrams | ||||
| 1 | Did you perform the Audible Warnings Diagnostic System Check? | - | Go to Step 2 | Go to Diagnostic System Check - Audible Warnings |
| 2 | 1. Install a scan tool. 2. Turn ON the ignition, with the engine OFF. 3. With the scan tool, observe the Key In Ignition parameter in the Body Control Module input data list. Does the Key In Ignition parameter display Yes? |
- | Go to TESTING WIRING SYSTEMS FOR INTERMITTENT & POOR CONNECTIONS | Go to Step 3 |
| 3 | 1. Turn OFF the ignition. 2. Disconnect the BCM connector C2. 3. Connect a test lamp between the key in ignition input circuit and battery positive voltage. 4. Turn ON the ignition, with the engine OFF. Does the test lamp illuminate? |
- | Go to Step 7 | Go to Step 4 |
| 4 | Test the key in ignition input circuit for an open or a high resistance. Did you find and correct the condition? |
- | Go to Step 10 | Go to Step 5 |
| 5 | Test the ground circuit of the ignition key alarm switch for an open or a high resistance. 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 ignition switch. Refer to TESTING WIRING SYSTEMS FOR INTERMITTENT & POOR CONNECTIONS
. 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 BCM. Refer to TESTING WIRING SYSTEMS FOR INTERMITTENT & POOR CONNECTIONS
. Did you find and correct the condition? |
- | Go to Step 10 | Go to Step 9 |
| 8 | Replace the ignition switch. Refer to IGNITION & KEY ALARM SWITCH ASSEMBLY
. Did you complete the replacement? |
- | Go to Step 10 | - |
| 9 | Important: Perform the set up procedure for the replacement BCM. Replace the BCM. Refer to BODY CONTROL MODULE Replacement in BODY CONTROL MODULES (DATA LINK COMMUNICATIONS) 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 |