| Last Modified: 11-29-2007 | 1.6 J | |
| Service Category: Vehicle Interior | Section: Door Lock | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM000001WYD00KX |
| Title: DOOR LOCK: WIRELESS DOOR LOCK CONTROL SYSTEM: DESCRIPTION (2008 Sequoia) | ||
|
No Answer-Back |
DESCRIPTION
In some cases, wireless door lock control functions are normal but the hazard warning lights and/or wireless door lock buzzer answer-back function(s) do not operate. In such cases, the main body ECU's hazard warning lights and wireless door lock buzzer signal outputs may be malfunctioning.
NOTICE:
Troubleshooting should be started after confirming that the customize status of the answer-back function has been switched ON.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
CHECK WIRELESS DOOR LOCK CONTROL FUNCTION |
(a) Check the wireless door lock control functions by operating the transmitter switch.
|
Result |
Proceed to |
|---|---|
|
Wireless door lock functions are normal but hazard warning lights answer-back does not occur |
A |
|
Wireless door lock functions are normal but wireless door lock buzzer answer-back does not occur |
B |
|
Doors cannot be locked and unlocked with transmitter |
C |
|
|
2. |
PERFORM ACTIVE TEST USING TECHSTREAM (FLASHER RELAY) |
(a) Select the Active Test, use the Techstream to generate a control command, and then check that the hazard warning lights flash.
Main Body
|
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
Hazard |
Turn Signal Flasher |
ON/OFF |
- |
OK:
Hazard warning lights are turned ON/OFF.
|
|
3. |
PERFORM ACTIVE TEST USING TECHSTREAM (WIRELESS DOOR LOCK BUZZER) |
(a) Select the Active Test, use the Techstream to generate a control command, and then check that the wireless buzzer operates normally.
Main Body
|
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
Wireless Buzzer |
Wireless Door Lock Buzzer |
ON/OFF |
- |
OK:
Wireless buzzer turns ON/OFF.
|
|
4. |
CHECK HARNESS AND CONNECTOR (WIRELESS DOOR LOCK BUZZER - MAIN BODY ECU AND BODY GROUND) |
(a) Disconnect the A40 wireless door lock buzzer connector.
(b) Disconnect the H1 main body ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A40-1 - H1-7 (BZR) |
Always |
Below 1 Ω |
|
A40-2 - Body ground |
Always |
|
|
A40-1 or H1-7 (BZR) - Body ground |
Always |
10 kΩ or higher |
(d) Reconnect the wireless door lock buzzer and main body ECU connector.
|
|
5. |
REPLACE WIRELESS DOOR LOCK BUZZER |
(a) Temporarily replace the wireless door lock buzzer with a new or normally functioning one
.
(b) Check that the buzzer sounds when using the transmitter LOCK and UNLOCK switches.
NOTICE:
When battery voltage is directly applied to the buzzer, the buzzer does not sound.
HINT:
The buzzer circuit is built into the main body ECU, not into the buzzer itself.
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