| Last Modified: 11-29-2007 | 1.6 J | |
| Service Category: Vehicle Interior | Section: Seat | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM000001YWU005X |
| Title: SEAT: REAR POWER SEAT CONTROL SYSTEM: DESCRIPTION (2008 Sequoia) | ||
|
Fold Seat Switch Circuit |
DESCRIPTION
When the fold seat switch is operated, a switch operation signal is sent to the fold seat control ECU. The ECU receives switch operation signals from each switch and activates the No. 1 power seat motor and No. 2 power seat motor.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
CHECK FOLD SEAT CONTROL ECU (FOLD SEAT SWITCH SIGNAL) |
(a) Check the No. 1 fold seat switch signal.
|
(1) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
(b) Check No. 2 fold seat switch signal.
|
(1) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
|
2. |
READ VALUE USING TECHSTREAM (BACK DOOR COURTESY SWITCH) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream ON.
(d) Enter the following menus: Body Electrical / Back Door P/W / Data List.
(e) According to the display on the Techstream, read the Data List.
Back Door P/W
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Back Door Courtesy Switch |
Back Door Courtesy Switch / ON or OFF |
ON: Back door opened OFF: Back door closed |
- |
OK:
When back door courtesy switch operation is performed, the results are the same as above.
|
|
3. |
INSPECT NO. 1 FOLD SEAT SWITCH |
(a) Remove the No. 1 fold seat switch
.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
LH Side
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
6 (FOLD) - 4 (E) |
No. 1 fold seat switch LH fold |
Below 1 Ω |
|
No. 1 fold seat switch LH OFF |
10 kΩ or higher |
|
|
7 (RTRN) - 4 (E) |
No. 1 fold seat switch LH return |
Below 1 Ω |
|
No. 1 fold seat switch LH OFF |
10 kΩ or higher |
RH Side
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
3 (FOLD) - 5 (E) |
No. 1 fold seat switch RH fold |
Below 1 Ω |
|
No. 1 fold seat switch RH OFF |
10 kΩ or higher |
|
|
4 (RTRN) - 5 (E) |
No. 1 fold seat switch RH return |
Below 1 Ω |
|
No. 1 fold seat switch RH OFF |
10 kΩ or higher |
|
|
4. |
CHECK HARNESS AND CONNECTOR (FOLD SEAT CONTROL ECU - NO. 1 FOLD SEAT SWITCH) |
|
(a) Disconnect the O34 or P20 ECU connector. |
(b) Disconnect the O27 or O28 switch connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
LH Side
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
O34-15 (RTRN) - O27-7 (RTRN) |
Always |
Below 1 Ω |
|
O34-15 (RTRN) - Body ground |
Always |
10 kΩ or higher |
|
O34-16 (FOLD) - O27-6 (FOLD) |
Always |
Below 1 Ω |
|
O34-16 (FOLD) - Body ground |
Always |
10 kΩ or higher |
RH Side
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
P20-15 (RTRN) - O28-4 (RTRN) |
Always |
Below 1 Ω |
|
P20-15 (RTRN) - Body ground |
Always |
10 kΩ or higher |
|
P20-16 (FOLD) - O28-3 (FOLD) |
Always |
Below 1 Ω |
|
P20-16 (FOLD) - Body ground |
Always |
10 kΩ or higher |
|
|
5. |
READ VALUE USING TECHSTREAM (REAR DOOR COURTESY SWITCH) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream ON.
(d) Enter the following menus: Body Electrical / Main Body / Data List.
(e) According to the display on the Techstream, read the Data List.
Main Body
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
RL Door Courtesy SW |
Rear door courtesy light switch LH signal / ON or OFF |
ON: Rear door courtesy light switch LH ON OFF: Rear door courtesy light switch LH OFF |
- |
|
RR Door Courtesy SW |
Rear door courtesy light switch RH signal / ON or OFF |
ON: Rear door courtesy light switch RH ON OFF: Rear door courtesy light switch RH OFF |
- |
OK:
When rear door courtesy light switch operation is performed, the results are the same as above.
|
|
6. |
INSPECT NO. 2 FOLD SEAT SWITCH |
(a) Remove the No. 2 fold seat switch
.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
LH Side
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
6 (FOLD) - 4 (E) |
No. 2 fold seat switch LH fold |
Below 1 Ω |
|
No. 2 fold seat switch LH OFF |
10 kΩ or higher |
|
|
7 (RTRN) - 4 (E) |
No. 2 fold seat switch LH return |
Below 1 Ω |
|
No. 2 fold seat switch LH OFF |
10 kΩ or higher |
RH Side
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
3 (FOLD) - 5 (E) |
No. 2 fold seat switch RH fold |
Below 1 Ω |
|
No. 2 fold seat switch RH OFF |
10 kΩ or higher |
|
|
4 (RTRN) - 5 (E) |
No. 2 fold seat switch RH return |
Below 1 Ω |
|
No. 2 fold seat switch RH OFF |
10 kΩ or higher |
|
|
7. |
CHECK HARNESS AND CONNECTOR (FOLD SEAT CONTROL ECU - NO. 2 FOLD SEAT SWITCH) |
(a) Disconnect the O34 or P20 ECU connector.
|
(b) Disconnect the O26 or P12 switch connector. |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
LH Side
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
O34-10 (FLD2) - O26-6 (FOLD) |
Always |
Below 1 Ω |
|
O34-10 (FLD2) - Body ground |
Always |
10 kΩ or higher |
|
O34-14 (RTN2) - O26-7 (RTRN) |
Always |
Below 1 Ω |
|
O34-14 (RTN2) - Body ground |
Always |
10 kΩ or higher |
RH Side
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
P20-10 (FLD2) - P12-3 (FOLD) |
Always |
Below 1 Ω |
|
P20-10 (FLD2) - Body ground |
Always |
10 kΩ or higher |
|
P20-14 (RTN2) - P12-4 (RTRN) |
Always |
Below 1 Ω |
|
P20-14 (RTN2) - Body ground |
Always |
10 kΩ or higher |
|
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