With Memory A45
DTC B2345 (With Memory A45)
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 Descriptors
DTC B2345 13
- Seat Heater Disable Circuit Low Voltage High/Temperature
Diagnostic Fault Information
Circuit/System Description
The seat memory 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 memory 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 will then continue to monitor the heating elements for a shorted circuit.
Conditions for Running the DTC
The seat memory 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 front 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 Electrical Diagrams
Connector End View Reference
Component Connector End Views Sunshade - Left (DH6)
Description and Operation
Heated Seats 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 Control Module References for scan tool information
Circuit/System Testing
1. Ignition OFF, disconnect the X2 and X3 harness connectors at the K40 seat memory control module.
2. Test for greater than 3.0 komhs between the signal and the low reference circuits listed below:
* E14B driver seat cushion terminal 16 X2 and terminal 12 X3
* E14D passenger seat cushion terminal 7 X2 and terminal 1 X3
• If 3.0 komhs or less
1. Ignition OFF, disconnect the harness connector at the appropriate E14B or E14D seat cushion heating element.
2. Test for Infinite resistance between the signal and low reference circuits.
• If less than infinite resistance, repair the short between the circuits.
• If infinite resistance, test or replace the E14 seat cushion heating element.
• If greater than 3.0 komhs
3. Replace the K40 seat memory control module.
Component Testing
E14B or E14D Seat Cushion Heating Element
1. Ignition OFF, disconnect the harness connector at the appropriate E14B or E14D seat cushion heating element.
2. Test for 500 omhs-300 komhs between the signal circuit terminal 2 and the low reference circuit terminal 1.
• If not between 500 omhs-300 komhs
Replace the E14B or E14D seat cushion heating element.
• If between 500 omhs-300 komhs
3. All OK.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Driver or Passenger Seat Cushion Heater Replacement Driver or Passenger Seat Cushion Heater Replacement
* Control Module References Control Module References for seat memory control module replacement, programming and setup