B14F3
SEAT: CLIMATE CONTROL SEAT SYSTEM: B14F3: Overcurrent Detected in Cushion Peltier
B14F3 - Overcurrent Detected in Cushion Peltier
DESCRIPTION
The seat climate control ECU stops output 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 Climate Control Seat System.
Result
D -- CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - HEATER BLOWER WIRE)
C -- CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - HEATER BLOWER WIRE)
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 e34 ECU connector.
(b) Disconnect the e33 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 or normally operating one, and check if a DTC is output.
OK:
DTC is not output
NG -- REPLACE SEAT CLIMATE CONTROL CONTROLLER LH Disassembly
OK -- REPLACE SEAT CLIMATE CONTROL ECU Disassembly
4. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - SEAT CLIMATE CONTROL CONTROLLER RH)
(a) Disconnect the e4 ECU connector.
(b) Disconnect the e2 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 or normally operating one, and check if a DTC is output.
OK:
DTC is not output
NG -- REPLACE SEAT CLIMATE CONTROL CONTROLLER RH Disassembly
OK -- REPLACE SEAT CLIMATE CONTROL ECU Disassembly
6. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - HEATER BLOWER WIRE)
(a) Disconnect the f28 ECU connector.
(b) Disconnect the fz2 joining 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.
7. CHECK HARNESS AND CONNECTOR (HEATER BLOWER WIRE)
(a) Disconnect the fz2 joining connector.
(b) Disconnect the z65 climate control controller LH 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.
8. CHECK SEAT CLIMATE CONTROL ECU (OPERATION)
(a) Replace the seat climate control ECU with a new or normally operating one, and check if a DTC is output.
OK:
DTC is not output
NG -- REPLACE SEAT CLIMATE CONTROL CONTROLLER LH Disassembly
OK -- REPLACE SEAT CLIMATE CONTROL ECU Disassembly
9. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - HEATER BLOWER WIRE)
(a) Disconnect the f8 ECU connector.
(b) Disconnect the fz1 joining 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.
10. CHECK HARNESS AND CONNECTOR (HEATER BLOWER WIRE)
(a) Disconnect the fz1 joining connector.
(b) Disconnect the z63 climate control controller RH 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.
11. CHECK SEAT CLIMATE CONTROL ECU (OPERATION)
(a) Replace the seat climate control ECU with a new or normally operating one, and check if a DTC is output.
OK:
DTC is not output
Result
D -- REPLACE SEAT CLIMATE CONTROL CONTROLLER RH Disassembly
C -- REPLACE SEAT CLIMATE CONTROL CONTROLLER RH Disassembly
B -- REPLACE SEAT CLIMATE CONTROL ECU Disassembly
A -- REPLACE SEAT CLIMATE CONTROL ECU Disassembly