B14F4

SEAT: CLIMATE CONTROL SEAT SYSTEM: B14F4: Overcurrent Detected in Seatback Peltier

DTC B14F4 - Overcurrent Detected in Seatback Peltier

DESCRIPTION

The seat climate control ECU stops outputs to the seat climate control controller if a short, etc. in the seat climate control controller, wire harness or ECU interior circuit causes overcurrent.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK FOR DTC
(a) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

Result





B -- CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - SEAT CLIMATE CONTROL CONTROLLER RH)
A -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - SEAT CLIMATE CONTROL CONTROLLER LH)





(a) Disconnect the c38 ECU connector.
(b) Disconnect the c41 climate control controller connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. CHECK SEAT CLIMATE CONTROL ECU (OPERATION)
(a) Replace the seat climate control ECU with a new one or normally operating one and check if a DTC is output.
OK:
DTC is not output.
NG -- REPLACE SEAT CLIMATE CONTROL CONTROLLER LH
OK -- REPLACE SEAT CLIMATE CONTROL ECU
4. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - SEAT CLIMATE CONTROL CONTROLLER RH)





(a) Disconnect the c24 ECU connector.
(b) Disconnect the c27 climate control controller connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. CHECK SEAT CLIMATE CONTROL ECU (OPERATION)
(a) Replace the seat climate control ECU with a new one or normally operating one and check if a DTC is output.
OK:
DTC is not output.
NG -- REPLACE SEAT CLIMATE CONTROL CONTROLLER RH
OK -- REPLACE SEAT CLIMATE CONTROL ECU