DESCRIPTION
If the back door entry lock function does not operate but the back door unlock function operates, the communication line between the vehicle and electrical key transmitter is normal. The entry lock switch circuit (back door control switch → certification ECU) may be faulty.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
PROCEDURE
1. |
CHECK POWER DOOR LOCK OPERATION |
(a) When the door control switch on the multiplex network master switch assembly
is operated, check that the doors unlock and lock according to the switch operation
(See page ).
OK:
Door locks operate normally.
NG | ![]() |
GO TO POWER DOOR LOCK CONTROL SYSTEM |
|
2. |
READ VALUE USING TECHSTREAM (LOCK SWITCH) |
(a) Using the Techstream, read the Data List (See page
).
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
Tr/B-Door Lock SW |
Back door lock switch / ON or OFF |
ON: Back door lock switch pushed OFF: Back door lock switch not pushed |
- |
OK:
"ON" (lock switch is pushed) and "OFF" (lock switch is not pushed) appear on the screen.
OK | ![]() |
REPLACE CERTIFICATION ECU |
|
3. |
INSPECT BACK DOOR CONTROL SWITCH (LOCK SWITCH) |
(a) Remove the back door control switch (See page
).
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
1 (SUP) - 2 (E3) |
No switch pushed |
10 kΩ or higher |
1 (SUP) - 2 (E3) |
Lock switch pushed |
Below 1 Ω |
NG | ![]() |
REPLACE BACK DOOR CONTROL SWITCH |
|
4. |
CHECK HARNESS AND CONNECTOR (BACK DOOR CONTROL SWITCH - CERTIFICATION ECU) |
(a) Disconnect the W11 switch connector.
(b) Disconnect the F79 ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
W11-1 (SUP) - F79-23 (TSW6) |
Always |
Below 1 Ω |
W11-2 (E3) - Body ground |
Always |
Below 1 Ω |
W11-1 (SUP) - Body ground |
Always |
10 kΩ or higher |
OK | ![]() |
REPLACE CERTIFICATION ECU |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
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...