DESCRIPTION
If the entry lock function does not operate for the back door only, but the entry unlock function operates, the request code is being transmitted properly from the back door. In this case, there may be a problem related to the lock switch (connection between the back door opener switch assembly and certification ECU (smart key ECU assembly)).
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
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PROCEDURE
1. | CHECK POWER DOOR LOCK CONTROL SYSTEM |
(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.
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OK:
Door locks operate normally.
NG | ![]() | GO TO POWER DOOR LOCK CONTROL SYSTEM |
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2. | INSPECT TECHSTREAM (TR/B-DOOR LOCK 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 / Smart Access / Data List.
(e) Read the Data List according to the display on the Techstream.
Body Electrical > Smart Access > Data List Tester Display | Measurement Item | Range | 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) pressed OFF: Back door opener switch assembly (lock switch) not pressed |
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Tester Display |
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Tr/B-Door Lock SW |
HINT:
When checking the operation of the entry lock function several times, it can be operated up to 2 times consecutively. To operate the function 3 times or more consecutively, the doors need to be unlocked once. However, this is only for the entry lock function, other door lock operations, such as a wireless door lock operation can be performed consecutively.
OK:
The Techstream display changes correctly in response to the operation of the back door opener switch assembly.
OK | ![]() | REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
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3. | CHECK HARNESS AND CONNECTOR (BACK DOOR OPENER SWITCH ASSEMBLY - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)) |
(a) Disconnect the R1 certification ECU (smart key ECU assembly) connector.
(b) Disconnect the Z8 back door opener switch assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
R1-27 (TSW6) - Z8-1 (L) | Always | Below 1 Ω |
Z8-2 (E) - Body ground | Always | Below 1 Ω |
R1-27 (TSW6) or Z8-1 (L) - Body ground | Always | 10 kΩ or higher |
NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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4. | INSPECT BACK DOOR OPENER SWITCH ASSEMBLY (LOCK SWITCH) |
(a) Remove the back door opener switch assembly.
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(b) Inspect the back door opener switch assembly.
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OK | ![]() | REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
NG | ![]() | REPLACE BACK DOOR OPENER SWITCH ASSEMBLY |
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