Circuit Description
This is the hardware Ignition 0, CKT 1600 input to the body control module (BCM) or the instrument cluster. They can be either in the ON or OFF position from the ignition switch.
Conditions for Setting the DTC
All of the following conditions must be met:
- Ignition 0 is not active.
- Ignition 1 is active for 20 seconds.
Action Taken When the DTC Sets
DTC B1369 is stored in the BCM memory.
Conditions for Clearing the DTC
| • | The BCM goes to sleep. The controller reinitializes with the fault cleared. |
| • | All BCM history codes will be cleared after 100 ignition cycles (from OFF to RUN) with no current codes active during the 100 ignition cycles. |
| Use the Scan Tool . |
Diagnostic Aids
| • | If the fuel gauge is always reading empty, the problem lies within the BCM or the wiring to the BCM. |
| • | The instrument cluster will not function if Ignition 0 is not present in the vehicle. |
| • | When the diagnostics direct you to take electrical measurements at the terminal assignments of the junction blocks, refer to Power Distribution Schematics in Wiring Systems. |
| • | If the DTC is a history DTC, the problem may be intermittent. Perform the tests shown while wiggling the wiring and connectors. This can often cause the malfunction to appear. |
Test Description
The numbers listed below refer to the numbers on the diagnostic table.
-
This step determines if CKT 1600 is delivering power to the body control module (BCM).
-
This step determines if there is an open in CKT 1600 between the BCM and the left side IP junction block.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the BCM Diagnostic System Check performed? | -- | Go to Step 2 | |
Is the voltage measured to the specified value? | B+ | Go to Step 3 | Go to Step 6 | |
3 | Inspect for a poor connection at the BCM harness connector C1 terminal A8. Was there a poor connection found? | -- | Go to Step 4 | Go to Step 5 |
4 | Repair the poor connection. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 11 | -- |
5 | Replace the BCM. Refer to the following procedures: Is the repair complete? | -- | Go to Step 11 | -- |
Is the measured resistance within the specified range? | 0-2ohms | Go to Step 8 | Go to Step 7 | |
7 | Repair an open in CKT 1600 between the left side IP junction block connector C1 terminal C9 and the BCM harness connector C1 terminal A8. Refer to Wiring Repairs in Wiring Systems. Is the circuit repair complete? | -- | Go to Step 11 | -- |
8 | Inspect for a poor connection at the left side IP junction block connector C1 terminal C9, CKT 1600. Was there a poor connection found? | -- | Go to Step 9 | Go to Step 10 |
9 | Repair the poor connection at the left side IP junction block connector C1 terminal C9, CKT 1600. Refer to Wiring Repairs in Wiring Systems. Is the circuit repair complete? | -- | Go to Step 11 | -- |
10 | Replace the left side IP junction block. Refer to Relay/Fuse Center Replacement in Wiring Systems. Is the circuit repair complete? | -- | Go to Step 11 | -- |
11 | Clear the DTCs from the memory. Are the DTCs cleared from the memory? | -- | -- |
