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Vauxhall Workshop Service and Repair Manuals

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DTC C0800 > < DTC P2500 or P2501

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DTC B1325

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: Control Module Power Circuit Low Voltage
DTC B1325 07: Control Module Power Circuit High Voltage

Diagnostic Fault Information



Circuit
Short to Ground
Open/High Resistance
Short to Voltage
Signal Performance

B+
B1325 03
B1325 03
-
-

Ground
-
B1325 03
-
-
 

Circuit/System Description

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

•  Headlamp control module
•  Seat heating control module
•  Mobile telephone control module
•  Instrument cluster
•  Trailer interface control module
•  Inflatable restraint sensing and diagnostic module
•  Passenger presence detection module
•  Seat memory control module
•  Multimedia player interface module
•  Keyless entry control module
•  Radio
•  Parking assist control module
•  Vehicle direction 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 s.

B1325 07

The control module detects a system voltage greater than 18 V for 5 s.

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 min 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

Control Module References


Connector End View Reference

Component Connector End Views


Description and Operation

Charging System Description and Operation


Electrical Information Reference


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 12.6-15.0 V.
⇒ If the battery voltage is not within the specified range, refer to Charging System Test .
2. Engine running, observe the appropriate 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 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:
  •  Terminal 1 X1, K26 Headlamp Control Module
  •  Terminal A X1, K29 Seat Heating Control Module
  •  Terminal 2, K82 Mobile Telephone Control Module
  •  Terminal 16, P16 Instrument Cluster
  •  Terminal 19 X1, K36 Inflatable Restraint Sensing and Diagnostic Module
  •  Terminal A, K85 Passenger Presence Detection Module
  •  Terminal 1 X2, K101 Trailer Interface Control Module
  •  Terminal 3 X4, K40 Seat Memory Control Module
  •  Terminal 6 X4, K40 Seat Memory Control Module
  •  Terminal 11 X1, T11 Multimedia Player Interface Module
  •  Terminal 12 X1, K84 Keyless Entry Control Module
  •  Terminal 38 X1, A11 Radio
  •  Terminal 7 X1, K41 Front and Rear Parking Assist Control Module
  •  Terminal 1, K74 Vehicle Direction Camera Control Module
  •  Terminal 5, K74 Vehicle Direction Camera Control Module
  •  Terminal 2, K74 Vehicle Direction Camera Control Module
⇒ If greater than the specified range, test the ground circuit for an open/high resistance.
3. Verify that a test lamp illuminates between the B+ circuit terminals listed below and ground:
  •  Terminal 10 X1, K26 Headlamp Control Module
  •  Terminal B X1, K29 Seat Heating Control Module
  •  Terminal 1, K82 Mobile Telephone Control Module
  •  Terminal 32, P16 Instrument Cluster
  •  Terminal 9 X1, K36 Inflatable Restraint Sensing and Diagnostic Module
  •  Terminal A, K85 Passenger Presence Detection Module
  •  Terminal 3 X2, Trailer interface control module
  •  Terminal 1 X4, K40 Seat Memory Control Module
  •  Terminal 5 X4, K40 Seat Memory Control Module
  •  Terminal 1 X1, T11 Multimedia Player Interface Module
  •  Terminal 1 X2, K84 Keyless Entry Control Module
  •  Terminal 5 X2, K84 Keyless Entry Control Module
  •  Terminal 44 X1, A11 Radio
  •  Terminal 1 X1, K41 Front and Rear Parking Assist Control Module
  •  Terminal 3 X1, K74 Vehicle Direction Camera Control Module
⇒ If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
4. If the circuits test normal, replace the appropriate control module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

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

DTC C0800 > < DTC P2500 or P2501