- Seat climate control controller
- Seat climate control ECU
- Harness or connector
| Last Modified: 11-27-2007 | 1.6 C | |
| Service Category: Vehicle Interior | Section: Seat | |
| Model Year: 2008 | Model: LX570 | Doc ID: RM000002RD4005X |
| Title: SEAT: CLIMATE CONTROL SEAT SYSTEM: DESCRIPTION (2008 LX570) | ||
|
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.
|
DTC Code |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
B14F4 |
Overcurrent detected in seatback peltier. |
|
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
CHECK FOR DTC |
(a) Check for DTCs
.
Result
|
Result |
Proceed to |
|---|---|
|
DTC is output (Driver seat climate control ECU) |
A |
|
DTC is output (Passenger seat climate control ECU) |
B |
|
|
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:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
c38-10 (TDB+) - c41-1 (TDB+) |
Always |
Below 1 Ω |
|
c38-10 (TDB+) - Body ground |
Always |
10 kΩ or higher |
|
c38-9 (TDB-) - c41-2 (TDB-) |
Always |
Below 1 Ω |
|
c38-9 (TDB-) - Body ground |
Always |
10 kΩ or higher |
|
c38-10 (TDB+) - c38-9 (TDB-) |
Always |
10 kΩ or higher |
|
|
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.
|
|
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:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
c24-10 (TDB+) - c27-1 (TDB+) |
Always |
Below 1 Ω |
|
c24-10 (TDB+) - Body ground |
Always |
10 kΩ or higher |
|
c24-9 (TDB-) - c27-2 (TDB-) |
Always |
Below 1 Ω |
|
c24-9 (TDB-) - Body ground |
Always |
10 kΩ or higher |
|
c24-10 (TDB+) - c24-9 (TDB-) |
Always |
10 kΩ or higher |
|
|
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.
|
|
|