| Last Modified: 11-29-2007 | 1.6 J | |
| Service Category: Vehicle Exterior | Section: Door/Hatch | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM0000036BN003X |
| Title: DOOR / HATCH: POWER BACK DOOR SYSTEM: DESCRIPTION (2008 Sequoia) | ||
|
Power Back Door cannot be Operated Using Any Switch |
DESCRIPTION
When the power back door cannot be operated using any switch, one of the following may be the cause: 1) initialization of the power back door ECU, or a malfunction in the 2) power back door touch sensor circuit, 3) power back door main switch circuit, 4) back door closer system, 5) meter/gauge system, 6) main body ECU (instrument panel junction block LH), or 7) power back door drive unit (power back door ECU).
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
INITIALIZE POWER BACK DOOR ECU |
(a) Check that the power back door drive unit (power back door ECU) can be initialized
.
|
|
2. |
CHECK POWER BACK DOOR SYSTEM |
(a) Check the power back door system operation.
OK:
Power back door system operates normally.
|
|
3. |
CHECK BACK DOOR CLOSER SYSTEM |
(a) Check the back door closer system operation
.
|
|
4. |
CHECK COMBINATION METER |
(a) Check the A/T shift position indicator operation.
(b) Check that the speedometer indicates 0 mph when the vehicle is stopped and the engine idling.
|
|
5. |
CHECK DTC OUTPUT |
(a) Check for the DTCs
.
Result
|
Result |
Proceed to |
|---|---|
|
DTC is not output |
A |
|
B2250 is output |
B |
|
B2251 is output |
C |
|
|
6. |
READ VALUE USING TECHSTREAM |
(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 |
|---|---|---|---|
|
Back Dor Open |
Back door lock / Permit or prohibit |
Permit: Back door is unlocked Prohibit: Back door is locked |
- |
OK:
The back door functions as specified in the normal condition.
|
|
7. |
READ VALUE USING TECHSTREAM |
(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/ Data List /
(e) According to the display on the Techstream, read the Data List.
Back Door
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
PBD Touch Sen L |
Power back door touch sensor LH signal / ON or OFF |
ON: Power back door touch sensor LH pressed OFF: Power back door touch sensor LH not pressed |
- |
|
PBD Touch Sen R |
Power back door touch sensor RH signal / ON or OFF |
ON: Power back door touch sensor RH pressed OFF: Power back door touch sensor RH not pressed |
- |
OK:
The power back door touch sensor functions as specified in the normal condition.
|
|
8. |
READ VALUE USING TECHSTREAM |
(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 / Data List /
(e) According to the display on the Techstream, read the Data List.
Back Door
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
PBD Main SW |
Power back door main switch / ON or OFF |
ON: Power back door main switch is not pushed OFF: Power back door main switch is pushed |
- |
OK:
The power back door main switch functions as specified in the normal condition.
|
|
9. |
INSPECT POWER BACK DOOR MAIN SWITCH |
|
(a) Remove the power back door main switch
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Position |
Specified Condition |
|---|---|---|
|
6 - 9 |
Pushed (OFF) |
10 kΩ or higher |
|
6 - 9 |
Not pushed (ON) |
Below 1 Ω |
(c) Reinstall the power back door main switch.
|
|
10. |
CHECK HARNESS AND CONNECTOR (MAIN SWITCH - BACK DOOR ECU AND BODY GROUND) |
|
(a) Disconnect the H69 switch connector. |
(b) Disconnect the O30 ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
H69-9 (MSW) - O30-17 (MSW) |
Always |
Below 1 Ω |
|
H69-6 (MSE) - Body ground |
Always |
Below 1 Ω |
|
H69-9 (MSW) - Body ground |
Always |
10 kΩ or higher |
(d) Reconnect the switch and ECU connector.
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|
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