B1330

DTC B1330

Diagnostic Instructions

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

DTC Descriptor
DTC B1330 03
- Device Power 2 Circuit Voltage Below Threshold

Diagnostic Fault Information





Circuit/System Description

The keyless entry control module monitor the system voltage through the battery positive (B+) voltage circuits.

Conditions for Running the DTC

* The voltage supplied to the control modules is in the range of 7-26 V.
* The ignition is ON.

Conditions for Setting the DTC

B1330 03

The control module detects a system voltage less than 8.4 V for 5 seconds.

Action Taken When the DTC Sets

* The control module immediately disables all outputs when an out of range voltage condition has been detected, with the exception of serial data, which is disabled after a 3 minute delay.
* The setting of other DTCs is inhibited.

Conditions for Clearing the DTC

The DTC passes when the malfunction is no longer present.

Diagnostic Aids

A high or low voltage value in multiple modules indicates a concern in the charging system.

Reference Information
Schematic Reference

Remote Function Schematics ([1][2]Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector End Views By Name)
Description and Operation

Charging System Description and Operation (Description and Operation)
Electrical Information Reference

* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)

Scan Tool Reference

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

Circuit/System Verification

1. Engine running, accessories OFF, measure and record the battery voltage at the C1 battery terminals. The voltage should be between 12.6 and 15.0 V.

• If the battery voltage is not within the specified range, refer to Charging System Test (Charging System Test).

2. Engine running, observe the keyless entry control module scan tool Battery Voltage parameters. Verify that the scan tool displays a value that is within 2 V of the battery terminal voltage.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connectors of the K84 keyless entry control module.
2. Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 10 Ohms between the ground circuit terminals listed below and ground:

* Terminal 2 X2
* Terminal 6 X2

• If greater than the specified range, test the ground circuit for an open/high resistance.

3. Test for greater than 9 V between the B+ circuit terminals listed below and ground:

* Terminal 1 X2
* Terminal 5 X2

• If less than the specified range, test the B+ circuit for a short to ground or an open/high resistance.

4. If the circuits test normal, replace the K84 keyless entry control module.

Repair Instructions

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

Control Module References (Programming and Relearning) for the appropriate control module replacement, programming and setup