For 1990-2009 cars
Theft Deterrent System Components
Cell 133: Fuel Tank Module, Instrument Cluster and Passlock Cylinder
Handling ESD Sensitive Parts Notice

### Circuit Description

This circuit supplies the Passlock™ data to the body control module (BCM) from the Passlock™ sensor, CKT 1836.

### Conditions for Setting the DTC

All of the following conditions must be met:

• | The Passlock™ option is enabled.

• | Ignition 0 is active.

• | The Passlock™ code does not equal the learned key code during the engine start or for 1 second at any time during an ignition cycle.

### Action Taken When the DTC Sets

• | The BCM enters the tamper mode.

• | The BCM stores DTC B2960 in the BCM memory.

• | If this DTC is set during ignition ON, the vehicle will not start.

• | If this DTC is set while the engine is ON, the theft indicator illuminates and the vehicle will restart on the next attempt.

### Conditions for Clearing the DTC

• | The BCM goes to sleep and reinitializes with the fault cleared.

• | All of the BCM history codes will be cleared after 100 ignition cycles (from OFF to RUN) with no current codes active during the 100 ignition cycles.

• | A Scan Tool is used.

### Diagnostic Aids

• | When the diagnostics direct you to take the electrical measurements at the wiring harness junction blocks, refer to Power Distribution Schematics for terminal assignments of the wiring harness junction blocks.

• | If the DTC is a history DTC, the problem may be intermittent. Perform the tests shown while wiggling the wiring and connectors. This action often causes the malfunction to appear.

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
Important: A short to ground will cause an open fuse(s). Before performing this diagnostic procedure, inspect the fuse(s) for an open.
1 | Was the Theft Deterrent Diagnostic System Check performed? | -- | Go to Step 2 | Go to Diagnostic System Check - Theft Deterrent
2 | Inspect for a poor connection at the BCM connector C3. Was a poor connection found? | -- | Go to Step 3 | Go to Step 4
3 | Repair the poor connection at the BCM connector C3. Refer to Wiring Repairs in Wiring Systems Is the repair complete? | -- | Go to Step 8 | --
4 | Inspect for a poor connection at the Passlock® sensor connector. Was a poor connection found? | -- | Go to Step 5 | Go to Step 6
5 | Repair the poor connection at the Passlock® sensor connector terminal A. Refer to Wiring Repairs in Wiring Systems Is the repair complete? | -- | Go to Step 8 | --
6 |

1. Replace the Passlock® sensor.
2. Reconnect the BCM. Refer to the following procedures:

• | Body Control Module (BCM) Programming/RPO Configuration in Body Control Systems

• | Body Control Module Replacement in Body Control Systems

3. Perform the Reprogramming Procedure Auto Learn.

Is the repair complete?

--

Go to Step 8

Go to Step 7

7 | Replace the BCM. Refer to the following procedures:

• | Body Control Module (BCM) Programming/RPO Configuration in Body Control Systems

• | Body Control Module Replacement in Body Control Systems

Is the repair complete?

--

Go to Step 8

--

8 | Clear the DTCs from the memory. Are the DTCs cleared from the memory? | -- | Go to Diagnostic System Check - Theft Deterrent | --