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:
| • | CKT 1836 is shorted to ground. |
| • | Ignition 0 is active. |
Action Taken When the DTC Sets
| • | The BCM stores the DTC B2957 in the BCM memory. |
| • | The vehicle will start, then immediately stall. |
| • | The security indicator will flash for 10 minutes. |
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 ON) with no current codes active during the 100 ignition cycles. |
| • | Use a scan tool. |
Diagnostic Aids
| • | Inspect for a bad connection at the Passlock® sensor and the BCM. |
| • | If the DTC is a history DTC, the problem may be intermittent. Perform the tests shown while wiggling the wiring and connectors. This will cause the malfunction to appear. |
Test Description
The numbers below refer to the numbers on the diagnostic table.
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 check performed? | -- | Go to Step 2 | |
Is the measured resistance equal to the specified value? | ∞ | Go to Step 4 | Go to Step 3 | |
3 | Repair the short to ground in CKT 1836 between the Passlock® connector terminal A and the BCM connector C2 terminal B6. Refer to Wiring Repairs in Wiring Systems Is the repair complete? | -- | Go to Step 12 | -- |
4 | Inspect for a poor connection at the BCM connector C2 terminal B6. Was a poor connection found? | -- | Go to Step 5 | Go to Step 6 |
5 | Repair the poor connection at the BCM connector C2 terminal B6. Refer to Wiring Repairs in Wiring Systems Is the repair complete? | -- | Go to Step 12 | |
6 | Inspect for a poor connection at the Passlock® sensor connector terminal A. Was a poor connection found? | -- | Go to Step 7 | Go to Step 8 |
7 | 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 12 | -- |
8 | Use the Scan Tool in order to view the BCM security data parameter Passlock® Data Voltages. Is the voltage displayed equal to the specified value? | 0 V | Go to Step 9 | |
9 |
Is the Passlock® Data voltage displayed equal to the specified value? | 5 V | Go to Step 10 | Go to Step 11 |
10 |
Is the repair complete? | -- | Go to Step 12 | -- |
11 | Replace the BCM. Refer to Body Control Module Replacement in Body Control Systems. Is the repair complete? | -- | Go to Step 12 | -- |
12 | Clear the DTCs from the memory. Are the DTCs cleared from the memory? | -- | -- | |
