Back Door Entry Unlock Function Does Not Operate
THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function): Back Door Entry Unlock Function does not Operate
- Back Door Entry Unlock Function does not Operate
DESCRIPTION
* If the back door entry unlock function using the back door opener switch assembly does not operate but the back door lock function operates, one of the following may be malfunctioning: 1) the back door opener switch assembly, or 2) the certification ECU.
* If the back door entry unlock function using the back door control switch does not operate but the back door lock function operates, one of the following may be malfunctioning: 1) the back door control switch, or 2) the multiplex network door ECU (back door P/W); or the multiplex network door ECU (back door P/W) receives the back door control switch unlock signal, but is unable to send the signal to the certification ECU through LIN and CAN communication.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
* The smart key system (for Entry Function) uses a multiplex communication system (LIN communication system) and the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting How To Proceed With Troubleshooting. Troubleshoot the smart key system (for Entry Function) after confirming that the communication systems are functioning properly.
* When using the Techstream with the engine switch off to troubleshoot: Connect the Techstream to the DLC3 and turn a courtesy light switch on and off at 1.5-second intervals until communication between the Techstream and vehicle begins.
* Check that there are no electrical key transmitters in the vehicle.
* When checking the entry lock operation multiple times, the lock operation may be limited to 2 consecutive operations depending on the settings. In order to perform the entry lock operation 3 or more times, an unlock operation must be performed once (any type of unlock operation is sufficient). However, only consecutive entry lock operations are limited. Using the wireless lock or other types of lock operations, it is possible to perform consecutive lock operations without this limitation.
* Before replacing the certification ECU, refer to the engine immobiliser system (w/ Smart Key System) Engine Immobilizer System (w/ Smart Key System).
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 Operation Check.
OK:
Door locks operate normally.
Result
B -- READ VALUE USING TECHSTREAM (UNLOCK SWITCH)
C -- GO TO POWER DOOR LOCK CONTROL SYSTEM How To Proceed With Troubleshooting
A -- Continue to next step.
2. READ VALUE USING TECHSTREAM (UNLOCK SWITCH)
(a) Using the Techstream, read the Data List Smart Key System (for Entry Function).
Smart Key
OK:
"ON" (unlock switch is pushed) and "OFF" (unlock switch is not pushed) appear on the screen.
NG -- INSPECT BACK DOOR OPENER SWITCH ASSEMBLY (UNLOCK SWITCH)
OK -- REPLACE CERTIFICATION ECU Removal
3. INSPECT BACK DOOR OPENER SWITCH ASSEMBLY (UNLOCK SWITCH)
(a) Remove the back door opener switch Disassembly.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPLACE BACK DOOR OPENER SWITCH ASSEMBLY (UNLOCK SWITCH) Disassembly
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (BACK DOOR OPENER SWITCH - CERTIFICATION ECU)
(a) Disconnect the back door opener switch connector.
(b) Disconnect the F79 ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE CERTIFICATION ECU Removal
5. READ VALUE USING TECHSTREAM (UNLOCK SWITCH)
(a) Using the Techstream, read the Data List Smart Key System (for Entry Function).
Back Door P/W
OK:
"ON" (unlock switch is pushed) and "OFF" (unlock switch is not pushed) appear on the screen.
NG -- INSPECT BACK DOOR CONTROL SWITCH (UNLOCK SWITCH)
OK -- REPLACE MULTIPLEX NETWORK DOOR ECU (BACK DOOR P/W) Disassembly
6. INSPECT BACK DOOR CONTROL SWITCH (UNLOCK SWITCH)
(a) Remove the back door control switch Disassembly.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPLACE BACK DOOR CONTROL SWITCH Disassembly
OK -- Continue to next step.
7. CHECK HARNESS AND CONNECTOR (BACK DOOR CONTROL SWITCH - MULTIPLEX NETWORK DOOR ECU)
(a) Disconnect the W11 switch connector.
(b) Disconnect the W10 ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE MULTIPLEX NETWORK DOOR ECU (BACK DOOR P/W) Disassembly