- Front seat cushion heater
- 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: RM000002RD100AX |
| Title: SEAT: CLIMATE CONTROL SEAT SYSTEM: DESCRIPTION (2008 LX570) | ||
|
DTC |
B14F2 |
Seat Heater Temperature Sensor Malfunction |
DESCRIPTION
Outputs to the temperature sensor of the front seat cushion heater stop if one of the following occurs: 1) the temperature sensor is open or shorted; or 2) the temperature sensor is damaged and its output value does not change.
|
DTC Code |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
B14F2 |
Seat heater temperature sensor malfunction. |
|
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. |
READ VALUE USING TECHSTREAM (SEAT HEATER TEMPERATURE SENSOR) |
(a) Check the Data List for proper functioning of the temperature sensor.
Front Left Seat A/C
|
Item |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Seat Heat Temp |
Seat heater temperature sensor signal / MIN: 0°C (32°F), MAX: 85°C (185°F) |
Within range from 0 to 85°C (32 to 185°F) |
- |
OK:
The display is as specified in the normal condition.
|
|
3. |
INSPECT FRONT SEAT CUSHION HEATER LH |
(a) Disconnect the c43 cushion heater connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
1 (H5) - 3 (HS) |
Outside air temperature 20 to 40°C (68 to 104°F) |
10.5 to 4 kΩ |
|
|
4. |
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:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
c39-9 (H5) - c43-1 (H5) |
Always |
Below 1 Ω |
|
c39-10 (HS) - c43-3 (HS) |
Always |
Below 1 Ω |
|
c39-9 (H5) - Body ground |
Always |
10 kΩ or higher |
|
c39-10 (HS) - Body ground |
Always |
10 kΩ or higher |
|
|
5. |
READ VALUE USING TECHSTREAM (SEAT HEATER TEMPERATURE SENSOR) |
(a) Check the Data List for proper functioning of the temperature sensor.
Front Right Seat A/C
|
Item |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Seat Heat Temp |
Seat heater temperature sensor signal / MIN: 0°C (32°F), MAX: 85°C (185°F) |
Within range from 0 to 85°C (32 to 185°F) |
- |
OK:
The display is as specified in the normal condition.
|
|
6. |
INSPECT FRONT SEAT CUSHION HEATER RH |
(a) Disconnect the c29 cushion heater connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
1 (H5) - 3 (HS) |
Outside air temperature 20 to 40°C (68 to 104°F) |
10.5 to 4 kΩ |
|
|
7. |
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:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
c25-9 (H5) - c29-1 (H5) |
Always |
Below 1 Ω |
|
c25-10 (HS) - c29-3 (HS) |
Always |
Below 1 Ω |
|
c25-9 (H5) - Body ground |
Always |
10 kΩ or higher |
|
c25-10 (HS) - Body ground |
Always |
10 kΩ or higher |
|
|
|