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 B1422 52: Device Power Moding Compare FailureConditions for Running the DTC
Voltage supplied to the module is in the normal operating voltage range of 9-16 V.
Conditions for Setting the DTC
| • | The RCDLR detects a loss of the power mode message from the IPM. |
| • | The IPM invalidates the power mode message. |
| • | The RCDLR senses a change on its ignition mode switch inputs, twice, without receiving the corresponding message from the IPM. |
Action Taken When the DTC Sets
| • | The backup power mode becomes the system power mode. This code will set following the setting of the DTC B1440. |
| • | The Service Vehicle Soon (SVS) indicator will illuminate. |
Conditions for Clearing the DTC
| • | A current DTC clears when the malfunction is no longer present. |
| • | A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction. |
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Power Mode Description and Operation
Electrical Information Reference
| • | Circuit Testing |
| • | Wiring Repairs |
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- Verify DTC B1380, B1385, or B1440 is not set.
- With a scan tool, clear DTC's. Verify DTC B1442 is not set.
| ⇒ | If DTC is set refer to Diagnostic Trouble Code (DTC) List - Vehicle. |
| ⇒ | If DTC is set replace the IPM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for IPM replacement, programming, and setup
