DESCRIPTION
If the back door entry lock function does not operate but the back door open function operates, the communication between the vehicle and key is normal. As a faulty part, the entry lock switch circuit (from the back door opener switch assembly (lock switch) to the certification ECU (smart key ECU assembly)) is suspected.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
PROCEDURE
1. |
CHECK POWER DOOR LOCK OPERATION |
(a) When the door control switch on the master switch assembly is operated, check
that the doors unlock and lock according to switch operation (See page
).
OK:
Door locks operate normally.
NG | ![]() |
GO TO POWER DOOR LOCK CONTROL SYSTEM (Proceed to Problem Symptoms Table) |
|
2. |
READ VALUE USING TECHSTREAM (BACK DOOR OPENER SWITCH) |
(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 / Smart Key / Data List.
(e) Read the Data List according to the display on the Techstream.
Smart Key (Certification ECU (Smart Key ECU Assembly))
Tester Display |
Measurement Item/Display |
Normal Condition |
Diagnostic Note |
---|---|---|---|
Tr/B-Door Lock SW |
Back door opener switch assembly (lock switch) / ON or OFF |
ON: Back door opener switch assembly (lock switch) pushed OFF: Back door opener switch assembly (lock switch) not pushed |
- |
OK:
On the Techstream screen, the display changes between ON and OFF as shown in the chart above.
OK | ![]() |
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
|
3. |
INSPECT BACK DOOR OPENER SWITCH ASSEMBLY |
(a) Remove the back door opener switch assembly (See page
|
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Switch Position |
Specified Condition |
---|---|---|
1 (L) - 2 (E) |
Back door opener switch assembly (lock switch) not pushed (OFF) |
10 kΩ or higher |
1 (L) - 2 (E) |
Back door opener switch assembly (lock switch) pushed (ON) |
Below 1 Ω |
*1 |
Component without harness connected (Back Door Opener Switch Assembly) |
NG | ![]() |
REPLACE BACK DOOR OPENER SWITCH ASSEMBLY |
|
4. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - BACK DOOR OPENER SWITCH) |
(a) Disconnect the certification ECU (smart key ECU assembly) connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
D25-1 (TSW6) - R13-1 (L) |
Always |
Below 1 Ω |
D25-1 (TSW6) - Body ground |
Always |
10 kΩ or higher |
R13-1 (L) - Body ground |
Always |
10 kΩ or higher |
*1 |
Front view of wire harness connector (to Certification ECU (Smart Key ECU Assembly)) |
*2 |
Front view of wire harness connector (to Back Door Opener Switch Assembly) |
OK | ![]() |
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. CHECK POWER SOURCE MODE CHANGE FUNCTION
(a) Check the function of the engine switch.
(1) Check that power source mode changes in accordance with the conditions of
the shift position and brake pedal.
Brake Pe ...
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
If a trouble code is displayed during the DTC check, check the parts listed for
that code in the table below and proceed to the appropriate page.
HINT:
The steering lock ECU does not store DTCs regarding the past problems.
S ...
Propeller Shaft System
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of problem symptoms. If multiple
suspected areas are listed, the potential causes of the symptoms are listed in order
of probability in the "Suspe ...