DESCRIPTION
In some cases, wireless door lock control functions are normal but the hazard warning light and/or wireless door lock buzzer answer-back function*1 does not operate. In such cases, hazard warning light and wireless door lock buzzer*1 signal outputs from the main body ECU (multiplex network body ECU) may be malfunctioning.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Click here
Click here
PROCEDURE
1. |
READ VALUE USING TECHSTREAM (Hazard Answer Back, Wireless Buzzer Resp, Wireless Buzzer Vol) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Customize Setting / Wireless Door Lock.
(e) Select the setting by referring to the table below.
Wireless Door Lock
Tester Display |
Description |
Default |
Setting |
ECU |
---|---|---|---|---|
Hazard Answer Back |
Function that flashes the hazard warning lights once when the doors are locked by wireless operation and twice when the doors are unlocked by wireless operation. |
ON |
0:OFF,1:ON |
Main body ECU (Multiplex network body ECU) |
Wireless Buzzer Resp |
Wireless door lock buzzer response*1 |
ON |
0:OFF,1:ON |
Main body ECU (Multiplex network body ECU) |
Wireless Buzzer Vol |
Wireless door lock buzzer volume*1 |
Level5 |
0000:Level7,0001:Level6,0010:Level5,0011:Level4,0100:Level3,0101:Level2,0110:Level1,0111:Level0 |
Main body ECU (Multiplex network body ECU) |
Result |
Proceed to |
---|---|
Both items are ON and except Level 0 |
A |
Either item is OFF or Level 0 |
B |
B | ![]() |
PERFORM CUSTOMIZE FUNCTION
|
|
2. |
CHECK WIRELESS DOOR LOCK CONTROL FUNCTIONS |
(a) Check the wireless door lock control function using the electrical key transmitter sub-assembly.
Result |
Proceed to |
---|---|
Wireless door lock/unlock operates properly |
A |
Wireless door lock/unlock does not operate properly |
B |
B | ![]() |
GO TO PROBLEM SYMPTOMS TABLE |
|
3. |
READ VALUE USING TECHSTREAM (FR Door Lock Pos, FL Door Lock Pos, RR-Door Lock Pos SW, RL-Door Lock Pos SW) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Main Body / Data List.
(e) Read the Data List according to the display on the Techstream.
Body Electrical > Main Body > Data List
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|---|
FR Door Lock Pos |
Front door RH unlock detection switch signal |
LOCK or UNLOCK |
LOCK: Front door RH locked UNLOCK: Front door RH unlocked |
- |
FL Door Lock Pos |
Front door LH unlock detection switch signal |
LOCK or UNLOCK |
LOCK: Front door LH locked UNLOCK: Front door LH unlocked |
- |
RR-Door Lock Pos SW |
Rear door RH unlock detection switch signal |
OFF or ON |
OFF: Rear door RH locked ON: Rear door RH unlocked |
- |
RL-Door Lock Pos SW |
Rear door LH unlock detection switch signal |
OFF or ON |
OFF: Rear door LH locked ON: Rear door LH unlocked |
- |
Tester Display |
---|
FR Door Lock Pos |
FL Door Lock Pos |
RR-Door Lock Pos SW |
RL-Door Lock Pos SW |
OK:
The Techstream display changes correctly in response to the lock/unlock operation.
NG | ![]() |
GO TO LIGHTING SYSTEM (Proceed to Door Unlock Detection Switch Circuit) |
|
4. |
CHECK WIRELESS ANSWER-BACK OPERATION |
(a) Check the wireless answer-back operation using the electrical key transmitter sub-assembly.
Result |
Proceed to |
---|---|
Only wireless door lock buzzer answer-back does not occur (w/ Toyota Safety Sense P) |
A |
Only hazard warning light answer-back does not occur |
B |
A | ![]() |
GO TO SMART KEY SYSTEM (for Entry Function) (Entry Exterior Alarm and Answer-back Buzzer do not Sound) |
|
5. |
CHECK HAZARD WARNING LIGHTS OPERATION |
(a) Check that the hazard warning lights blink when the hazard warning signal switch is pressed.
OK:
Hazard warning lights blink.
OK | ![]() |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
NG | ![]() |
GO TO LIGHTING SYSTEM (Proceed to Hazard Warning Switch Circuit) |
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Turn the engine switch to the "LOCK" position and ensure that all the doors
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PROCEDURE
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(a) Using needle-nose pliers install a new cooler dryer to the modulator.
*a
Modulator
...