DESCRIPTION
When the power back door warning system does not operate, one of the following may be malfunctioning: 1) power back door warning buzzer circuit, 2) wireless door lock control system or 3) power back door ECU.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
PROCEDURE
1. |
CHECK OPERATION |
(a) Check power back door system operation.
Result |
Proceed to |
---|---|
Power back door warning buzzer does not operate |
A |
Hazard warning light does not come on |
B |
Power back door warning buzzer in the power back door ECU does not operate |
C |
B |
GO TO STEP 5 |
C |
REPLACE POWER BACK DOOR ECU (POWER BACK DOOR MOTOR UNIT) |
|
2. |
PERFORM ACTIVE TEST USING TECHSTREAM (POWER BACK DOOR WARNING BUZZER) |
(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) Using the Techstream, perform the Active Test to generate a control command, and check that the power back door warning buzzer sounds.
Back Door (Power Back Door ECU)
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
---|---|---|---|
PBD Buzzer |
Power back door warning buzzer sound |
ON / OFF |
- |
OK:
Buzzer sounds normally.
OK |
REPLACE POWER BACK DOOR ECU (POWER BACK DOOR MOTOR UNIT) |
|
3. |
INSPECT POWER BACK DOOR WARNING BUZZER |
(a) Remove the power back door warning buzzer (See page ). |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
2 (BZR+) - 1(BZR-) |
Always |
950 to 1050 Ω |
*1 |
Component without harness connected (Power Back Door Warning Buzzer) |
NG |
REPLACE POWER BACK DOOR WARNING BUZZER |
|
4. |
CHECK HARNESS AND CONNECTOR (POWER BACK DOOR WARNING BUZZER - POWER BACK DOOR ECU) |
(a) Disconnect the R18 power back door warning buzzer connector and L20 power back door ECU connector.
(b) Disconnect the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
R18-2 (BZR+) - L20-26 (BZR+) |
Always |
Below 1 Ω |
R18-1 (BZR-) - Body ground |
Always |
Below 1 Ω |
R18-2 (BZR+) - Body ground |
Always |
10 kΩ or higher |
*1 |
Front view of wire harness connector (to Power Back Door Warning Buzzer) |
*2 |
Front view of wire harness connector (to Power Back Door ECU) |
OK |
REPLACE POWER BACK DOOR ECU (POWER BACK DOOR MOTOR UNIT) |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
5. |
CHECK WIRELESS DOOR LOCK CONTROL SYSTEM (HAZARD ANSWER-BACK FUNCTION) |
(a) Check wireless door lock operation.
Result |
Proceed to |
---|---|
Hazard answer-back function operates normally |
A |
Hazard answer-back function does not operate (w/ Smart Key System) |
B |
Hazard answer-back function does not operate (w/o Smart Key System) |
C |
B |
GO TO WIRELESS DOOR LOCK CONTROL SYSTEM (w/ Smart Key System) (NO ANSWER-BACK) |
C |
GO TO WIRELESS DOOR LOCK CONTROL SYSTEM (w/o Smart Key System) (NO ANSWER-BACK) |
|
6. |
REPLACE POWER BACK DOOR MOTOR UNIT (POWER BACK DOOR ECU) |
(a) Replace the power back door ECU (power back door motor unit) (See page ).
|
7. |
CHECK POWER BACK DOOR OPERATION |
(a) Check that the power back door hazard warning lights operate normally (See page ).
OK:
The power back door hazard warning lights operate normally.
OK |
END (POWER BACK DOOR ECU (POWER BACK DOOR MOTOR UNIT) WAS DEFECTIVE) |
NG |
REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY) |
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