B1422

DTC B1422

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.



DTC Descriptor
DTC 1422 52
- Device Power Moding Error Compare Failure




Conditions for Running the DTC

Voltage supplied to the module is in the normal operating voltage range of 9-16 volts.


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

Power Distribution Schematics (Power Distribution Diagrams)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Power Mode Description and Operation (Power Mode Description and Operation)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information


Circuit/System Verification

1. Verify DTC B1380, B1385, or B1440 is not set.

• If DTC is set refer to Diagnostic Trouble Code (DTC) List - Vehicle (Diagnostic Trouble Code Descriptions) .

2. With a scan tool, clear DTC's. Verify DTC BB1442 is not set.

• If DTC is set replace the IPM.




Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.


Control Module References (Programming and Relearning) for IPM replacement, programming, and setup