B370A

DTC B370A

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 B370A 00
- Rain Sensor Maifunction




Circuit/System Description

The rain sensor module has internal logic that monitors it's communication with the underhood electrical center (UEC). If the the rain sensor can not communicate with the UEC a code B370A is set.


Conditions for Running the DTC

* The system voltage is 9-18 volts.
* Ignition on.



Conditions for Setting the DTC

Rain sensor is activated and has communication failure with UEC.


Action Taken When the DTC Sets

Auto Rain senceing wipers are disabled, wipers work normally in all manual modes.


Conditions for Clearing the DTC

* The DTC will be current for as long as the fault is present.
* When the fault is no longer present, the DTC will be a history DTC.
* A history DTC will clear after 50 ignition cycles.



Reference Information
Schematic Reference

Wiper/Washer Schematics ([1][2]Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Wiper/Washer System Description and Operation (Wiper/Washer System 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

Clear all DTCs and operate the wipers in Conditions for Running the DTC. The DTC should not set.

If the DTC sets, replace the rain sensor.



Repair Instructions

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


Windshield Outside Moisture Sensor Replacement (Windshield Outside Moisture Sensor Replacement)