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 junction blocks, refer to Power Distribution Schematics in Wiring Systems 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
--- | --- | --- | --- | ---
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 Replacement in Body Control Systems

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

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