2010 Chevrolet Camaro LT - DTC B1325 Diagnosis

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 Descriptors

• DTC B1325 03: Device Power Circuit Voltage Below Threshold
• DTC B1325 07: Device Power Circuit Voltage Above Threshold

Diagnostic Fault Information

Circuit/System Description

The following control modules monitor the system voltage through the battery positive (B+) voltage circuits:

• Instrument cluster
• Passenger presence detection module
• Inflatable restraint sensing and diagnostic module
• Multimedia player interface module
• Radio
• Parking assist control module

Conditions For Running The DTC

• The voltages supplied to the control modules are in the range of 7-26 V.
• The ignition is ON.

Conditions For Setting The DTC

• B1325 03: The control module detects a system voltage less than 9 V for 5 seconds.
• B1325 07: The control module detects a system voltage greater than 18 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.
• Overcharging with a battery charger or jump starting can cause this DTC to set.

Reference Information

Schematic Reference

• Instrument Cluster Schematics
• Object Detection Schematics
• Radio/Navigation System Schematics
• SIR Schematics

Connector End View Reference

• Component Connector End Views

Description and Operation

• Charging System Description and Operation

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Scan Tool Reference

• Control Module References 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.
2. If the battery voltage is not within the specified range, refer to Charging System Test.
3. Observe the appropriate module scan tool Battery Voltage parameters. Verify that the scan tool displays a value that is within 2 V of the C1 battery terminal voltage.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connectors of the appropriate control module.
2. Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5 Ω between the ground circuit terminals listed below and ground:
   1. Terminal 10, P16 Instrument cluster
   2. Terminal A2, K85 Passenger presence detection module
   3. Terminal 19 X1, K86 Inflatable restraint sensing and diagnostic module
   4. Terminal 11 X1, T11 Multimedia player interface module
   5. Terminal 38 X1, A11 Radio
   6. Terminal 7 X1, K41 Parking assist control module
3. If greater than the specified range, test the ground circuit for an open/high resistance.
4. Verify that a test lamp illuminates between the B+ circuit terminals listed below and ground:
   1. Terminal 20, P16 Instrument cluster
   2. Terminal A1, K85 Passenger presence detection module
   3. Terminal 9 X1, K36 Inflatable restraint sensing and diagnostic module
   4. Terminal 1 X1, T11 Multimedia player interface module
   5. Terminal 44 X1, A11 Radio
   6. Terminal 1 X1, K41 Parking assist control module
5. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
6. If the circuits test normal, replace the appropriate control module.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for the appropriate control module replacement, setup, and programming.