| Last Modified: 11-29-2007 | 1.6 J | |
| Service Category: Vehicle Interior | Section: Door Lock | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM000000TO5012X |
| Title: DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM: DESCRIPTION (2008 Sequoia) | ||
|
All Doors cannot be Locked / Unlocked Simultaneously |
DESCRIPTION
The main body ECU receives switch signals from the power window regulator master switch, switch signal from the front door lock switch, tail gate control switch signal and driver side door key cylinder switch signals from the front door look. The main body ECU activates the door look motor on each door according to the signals.
HINT:
Since the power door lock control system has functions that use LIN communication, first confirm that there is no malfunction in the communication system by inspecting the LIN communication functions in accordance with the "How to Proceed with Troubleshooting" procedures. Then, conduct the following inspection procedure.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
CHECK POWER DOOR LOCK OPERATION |
(a) Check the power door lock operation.
Result
|
Result |
Proceed to |
|---|---|
|
All doors cannot be locked through power window regulator master switch, door control switch RH, tail gate control switch, and driver side door key link switch. |
A |
|
All doors cannot be locked through power window regulator master switch . |
B |
|
All doors cannot be locked through tail gate control switch. |
C |
|
All doors cannot be locked through door control switch RH. |
D |
|
All doors cannot be locked through driver side door key link switch. |
E |
|
|
2. |
INSPECT FUSES (ECU-B1, DR/LCK) |
(a) Remove the ECU-B1 and DR/LCK fuses.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
ECU-B1 fuse |
Always |
Below 1 Ω |
|
DR/LCK fuse |
Always |
Below 1 Ω |
(c) Reinstall the ECU-B1 and DR/LCK fuses.
|
|
3. |
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY AND BODY GROUND) |
(a) Disconnect DA, DB, and DD main body ECU connector.
(b) Measure the voltage and resistance and voltage according to the value(s) in the table below.
Standard Voltage :
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
DA-1(ALTB) - Body ground |
Always |
11 to 14 V |
|
DB-13(BECU) - Body ground |
Always |
11 to 14 V |
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
DD-62(GND) - Body ground |
Always |
Below 1 Ω |
(c) Reconnect main body ECU connector.
|
|
4. |
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 / Master Switch / Data List/
(e) According to the display on the Techstream, read the "Data List".
Master Switch
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Door Lock Switch Status |
Driver door lock switch signal/ ON or OFF |
ON: Driver door lock switch is turned to LOCK OFF: ON: Driver door lock switch is not turned |
- |
|
Door Unlock Switch Status |
Driver door unlock switch signal/ ON or OFF |
ON: Driver door unlock switch is turned to UNLOCK OFF: ON: Driver door unlock switch is not turned |
- |
OK:
The display is as specified in the normal condition column.
|
|
5. |
READ VALUE USING TECHSTREAM (TAIL GATE CONTROL SWITCH OPERATION) |
(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 (Back Door ECU)
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Key Switch Operation Locked |
Tail gate control switch signal/ON or OFF |
ON: Back door key cylinder is turned to LOCK OFF: Driver side door key cylinder is not turned |
- |
|
Key Switch Operation Unlocked |
Tail gate control switch signal/ON or OFF |
ON: Back door key cylinder is turned to UNLOCK OFF: Back door key cylinder is not turned |
- |
OK:
The display is as specified in the normal condition column.
|
|
6. |
READ VALUE USING TECHSTREAM (BACK DOOR OPEN) |
(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 (Main Body ECU)
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Back Door Open |
Back door lock signal/Permit or Prohibit |
Permit: Back door is UNLOCK Prohibit: Back door is LOCK |
- |
|
|
7. |
CHECK HARNESS AND CONNECTOR (TAIL GATE CONTROL SWITCH - BACK DOOR ECU) |
(a) Disconnect V18 switch connector.
(b) Disconnect V3 ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
V18-1(UL) - V3-7(BKUL) |
Always |
Below 1 Ω |
|
V18-2(L) - V3-8(BKL) |
Always |
Below 1 Ω |
|
V18-3(E) - V3-19(KEYE) |
Always |
Below 1 Ω |
|
V18-1(UL) or V3-7(BKUL) - Body ground |
Always |
10 kΩ or higher |
|
V18-2(L) - V3-8(BKL) - Body ground |
Always |
10 kΩ or higher |
(d) Reconnect the switch and ECU connector.
|
|
8. |
INSPECT TAIL GATE CONTROL SWITCH |
(a) Remove the tail gate control switch
.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
1(UL) - 3(E) |
Lock position |
Below 1 Ω |
|
2(L) - 3(E) |
Unlock position |
Below 1 Ω |
|
2(L) - 3(E) |
Lock position |
10 kΩ or higher |
|
1(UL) - 3(E) |
Unlock position |
10 kΩ or higher |
(c) Reinstall the tail gate control switch.
|
|
9. |
READ VALUE USING TECHSTREAM (DOOR LOCK SWITCH RH) |
(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 |
|---|---|---|---|
|
Door Lock SW-Lock |
Door manual lock switch signal ON or OFF |
ON: Door control switch is pushed to lock position OFF: Door control switch is not pushed |
- |
|
Door Lock SW-Unlock |
Door manual unlock switch signal / ON or OFF |
ON: Door control switch is pushed to unlock position OFF: Door control switch is not pushed |
- |
OK:
The display is as specified in the normal condition column.
|
|
10. |
CHECK HARNESS AND CONNECTOR (FRONT DOOR CONTROL SWITCH - MAIN BODY ECU) |
(a) Disconnect the L5 switch connector.
(b) Disconnect the DD ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
L5-4 (L) - DD-49 (L1) |
Always |
Below 1 Ω |
|
L5-2 (UL) - DD-40 (UL1) |
Always |
Below 1 Ω |
|
L5-3 (E) - Body ground |
Always |
Below 1 Ω |
|
DD-49 (L1) - Body ground |
Always |
10 kΩ or higher |
|
DD-40 (L1) - Body ground |
Always |
10 kΩ or higher |
(d) Reconnect the switch and ECU connector.
|
|
11. |
INSPECT DOOR CONTROL SWITCH RH |
(a) Remove the door control switch
.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
4 (L) - 3 (E) |
Lock |
Below 1 Ω |
|
4 (L) - 3 (E) |
OFF (Free) |
10 kΩ or higher |
|
2 (UL) - 3 (E) |
OFF (Free) |
10 kΩ or higher |
|
2 (UL) - 3 (E) |
Unlock |
Below 1 Ω |
(c) Reinstall the door control switch.
|
|
12. |
READ VALUE USING TECHSTREAM (DRIVER SIDE LOCK/UNLOCK KEY 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 |
|---|---|---|---|
|
Door Key SW-Lock |
Driver door lock/unlock switch lock signal (Key-linked lock switch) / ON or OFF |
ON: Driver side door key cylinder is turned to lock position OFF: Driver side door key cylinder is not turned |
- |
|
D Door Key SW-UL |
Driver door lock/unlock switch unlock signal (2 step key-linked unlock switch) / ON or OFF |
ON: Driver side door key cylinder is turned to unlock position OFF: Driver side door key cylinder is not turned |
- |
OK:
The display is as specified in the normal condition column.
|
|
13. |
CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK LH - MAIN BODY ECU) |
(a) Disconnect the DD and M4 ECU connector.
(b) Disconnect the H4 door lock connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
M4-9(L) - DD-53(L2) |
Always |
Below 1 Ω |
|
M4-10(UL) - H4-10(UL3) |
Always |
Below 1 Ω |
|
M4-7(E) - Body ground |
Always |
Below 1 Ω |
|
M4-10(UL) - Body ground |
Always |
10 kΩ or higher |
|
M4-9(L) - Body ground |
Always |
10 kΩ or higher |
(d) Reconnect the ECU and door lock connector.
|
|
14. |
INSPECT FRONT DOOR LOCK LH |
(a) Remove the front door lock LH
.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
7(E) - 9(L) |
ON (Door lock set to LOCK) |
Below 1 Ω |
|
7(E) - 9(L) 7(E) - 10(UL) |
OFF (Free) |
10 kΩ or higher |
|
7(E) - 10(UL) |
ON (Door lock set to UNLOCK) |
Below 1 Ω |
(c) Reinstall the front door lock LH.
|
|
|