Workshop Manuals Factory service & repair Vauxhall
Vauxhall Astra J16 · Seats
16 · Body & interior

DTC B2345

Make
Vauxhall
Model
Astra J
Section
Seat Heating and Cooling › Other Information › DTC B2345
SeatsDTC B2345

DTC B2345

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 B2345 13: Seat Heater Disable Circuit Low Voltage High/Temperature

Diagnostic Fault Information



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

Driver Heated Seat Element Control Terminal 3 X2
B242A 02
B2425 0D
B242A 01
B2425 0E

Driver Heated Seat Element Control Terminal 1 X2
B242A 02
B2425 0D
B242A 01
B2425 0E

Driver Heated Seat Cushion Temperature Sensor Signal
B1925 02
B1925 05
B1925 05
B2345 13

Driver Heated Seat Cushion Temperature Sensor Low Reference
-
B1925 05
-
B2345 13

Passenger Heated Seat Element Control Terminal 5 X2
B242A 02
B2430 0D
B242A 01
B2430 0E

Passenger Heated Seat Element Control Terminal 2 X2
B242A 02
B2430 0D
B242A 01
B2430 0E

Passenger Heated Seat Cushion Temperature Sensor Signal
B2170 02
B2170 05
B2170 05
B2345 13

Passenger Heated Seat Cushion Temperature Sensor Low Reference
-
B2170 05
-
B2345 13
 

Circuit/System Description

The seat heating control module controls seat heating operation for both the driver and front passenger seats. The heating elements are controlled through individual high side and low side control circuits. The low side control circuits for both seats are connected to a common reference point internal to the module. This reference point is biased to approximately 2.5 V. Before the seat heating control module will allow heated seat operation, it checks to see if this biased voltage is shorted to ground or voltage. Once the module verifies that it is not closing to a shorted heating element, it allows for heated seat operation. The module then continues to monitor the heating elements for a shorted circuit.

Conditions for Running the DTC

The seat heating control module must be powered.

Conditions for Setting the DTC

B2345 13

Any temperature sensor input that remains below 1.5 V for more than 1 second.

Action Taken When the DTC Sets

The heated seat function for both seats will be disabled.

Conditions for Clearing the DTC

•  The current DTC will clear and set the code to history 3 seconds after the reference voltage returns to the normal operating range and the ignition is cycled OFF then back to ACC or RUN.
•  The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.

Reference Information


Schematic Reference

Heated/Cooled Seat Schematics


Connector End View Reference

Component Connector End Views


Description and Operation

Heated Seats Description and Operation


Electrical Information Reference


Scan Tool Reference

Control Module References for scan tool information

Circuit/System Testing

1. Ignition OFF, disconnect the X2, X3 harness connectors at the K29 seat heating control module.
2. Test for greater than 3.0 kΩ between the signal and the low reference circuits listed below:
  •  E14B driver seat cushion terminal 3 X3 and terminal 13 X2
  •  E14D passenger seat cushion terminal 4 X3 and terminal 14 X2
⇒ If less than the specified value, test for a short between the signal and low reference circuits. If the circuits test normal, replace the appropriate E14 seat cushion heating element.
3. If all circuits test normal, replace the K29 seat heating control module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

•  Control Module References for seat heating control module replacement, programming and setup

Parts & tools for this job For Vauxhall Astra

Links open Amazon search results in a new tab. As an Amazon Associate I earn from qualifying purchases.