B14F5

SEAT: CLIMATE CONTROL SEAT SYSTEM: B14F5: Overcurrent Detected in Seat Heater

DTC B14F5 - Overcurrent Detected in Seat Heater

DESCRIPTION

The seat climate control ECU stops outputs to the seat climate control controller if a short, etc. in the seat heater, 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 - FRONT SEAT CUSHION HEATER RH)
A -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - FRONT SEAT CUSHION HEATER LH)





(a) Disconnect the c39 ECU connector.
(b) Disconnect the c43 cushion heater 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 FRONT SEAT CUSHION HEATER LH
OK -- REPLACE SEAT CLIMATE CONTROL ECU
4. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - FRONT SEAT CUSHION HEATER RH)





(a) Disconnect the c25 ECU connector.
(b) Disconnect the c29 cushion heater 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 FRONT SEAT CUSHION HEATER RH
OK -- REPLACE SEAT CLIMATE CONTROL ECU