Circuit Description
The body control module (PZM) commands the high beams through a discrete output to the high/low beam headlamp control relay. When the headlamps relay is energized the high/low beam headlamp control relay provides a power source to either the low beams or the high beams.
Conditions for Setting the DTC
The commanded state of the high beams does not match the feedback state.
Action Taken When the DTC Sets
The PZM continues to command the state requested until the state is achieved or the request has changed.
Conditions for Clearing the DTC
The commanded state matches the feedback state.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the Body Control Module Diagnostic System Check performed? | -- | Go to Step 2 | |
2 |
Is the voltage within the specified range? | 10-15 V | Go to Step 3 | Go to Step 7 |
3 | Measure voltage from the HI/LO beam headlamp relay terminal C9 (ORN/BLK) to terminal D7 (BLK/WHT) Is the voltage within the specified range? | 10-15 V | Go to Step 4 | Go to Step 5 |
4 | Replace the HI/LO beam headlamp relay. Is the repair complete? | -- | -- | |
5 | Test CKT 1969 (BLK/WHT) for an open. Was an open found? | -- | Go to Step 8 | Go to Step 6 |
6 | Replace the PZM. Refer to Body Control Module Replacement . Is the repair complete? | -- | -- | |
7 | Repair the open or the short to ground in CKT 40 (ORN/BLK). Is the repair complete? | -- | -- | |
8 | Repair the open in CKT 1969 (BLK/WHT). Is the repair complete? | -- | -- |
