DESCRIPTION
If the entry back door open function does not operate but the back door entry lock function operates, the communication between the vehicle and key is normal. As a faulty part, the back door open switch circuit (from the back door opener switch assembly (opener switch) to the certification ECU (smart key ECU assembly)) is suspected.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
PROCEDURE
1. |
READ VALUE USING TECHSTREAM (ENTRY BACK DOOR OPEN FUNCTION) |
(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/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
B-Dr Opening Operation |
Back door opening Operation / Long, Twice, OFF |
Customization status displayed |
- |
Result |
Proceed to |
---|---|
Customize setting is LONG or TWICE. |
A |
Customize setting is OFF. |
B |
B | ![]() |
PERFORM CUSTOMIZE SETTING (Proceed to Customize Parameters) |
|
2. |
CHECK POWER DOOR LOCK CONTROL SYSTEM |
(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) |
|
3. |
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/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
Tr/B-Door Unlock SW |
Back door opener switch assembly (opener switch) / ON or OFF |
ON: Back door opener switch assembly (opener switch) pushed OFF: Back door opener switch assembly (opener 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) |
|
4. |
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 |
---|---|---|
2 (E) - 3 (UL) |
Back door opener switch assembly (opener switch) not pushed (OFF) |
10 kΩ or higher |
2 (E) - 3 (UL) |
Back door opener switch assembly (opener switch) pushed (ON) |
Below 1 Ω |
*1 |
Component without harness connected (Back Door Opener Switch Assembly) |
NG | ![]() |
REPLACE BACK DOOR OPENER SWITCH ASSEMBLY |
|
5. |
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 |
---|---|---|
D25-22 (TSW5) - R13-3 (UL) |
Always |
Below 1 Ω |
D25-22 (TSW5) - Body ground |
Always |
10 kΩ or higher |
R13-3 (UL) - 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 |
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On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT TRANSFER OIL
(a) Remove the No. 1 transfer case plug and gasket.
(b) Check that the oil level is between 0 and 5 mm (0 ...
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