For 1990-2009 cars only
Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category |
DTC Descriptor
DTC B1325: Device Power CircuitCircuit/System Description
With the ignition in either the ACC or ON positions, the HVAC control module should receive a 12V power supply. DTC B1325 will set to indicate the B+ positive supplied to the AHLL control module is below the threshold.
Conditions for Setting the DTCs
This DTC runs continuously once the following condition is met:
The supplied power to the HVAC control module is between 9 - 16V.
Action Taken When the DTC Sets
A warning lamp will illuminate.
Conditions for Clearing the DTC
| • | The condition for setting the DTC is no longer present. |
| • | The DTC can be cleared using a scan tool. |
Reference Information
Schematic Reference
Connector End View Reference
Scan Tool Reference
Circuit/System Testing
- Ignition OFF, wait for 30 seconds.
- Ignition ON, using the scan tool, select the DTC display function. Verify that DTC B1325 is set to current.
- Ignition OFF, disconnect the HVAC control module harness connector.
- Ignition ON, test for B+ between the battery positive voltage circuit at the HVAC control module harness connector and a known ground.
| ⇒ | If not within specified range, test the battery positive voltage circuit for an open/high resistance. If the circuit tests normal replace the HVAC control module. |
Repair Instructions
Perform the Diagnostic Repair Verification , after completing the diagnostic procedure.
