Driver Side Door Entry Unlock Function Does Not Operate

DOOR LOCK: SMART KEY SYSTEM: Driver Side Door Entry Unlock Function does not Operate
- Driver Side Door Entry Unlock Function does not Operate

DESCRIPTION

If the driver door entry unlock function does not operate but the entry lock function operates, the communication line between the vehicle and electrical key transmitter is normal. As a faulty part, the touch sensor circuit (certification ECU (smart key ECU assembly) -> driver side door outside handle -> driver side door electrical key oscillator) can be considered.

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
Before performing the inspection, check that there are no problems related to "CAN COMMUNICATION SYSTEM" and "LIN COMMUNICATION SYSTEM".

PROCEDURE

1. CHECK POWER DOOR LOCK OPERATION

(a) When the door control switch on the master switch assembly is operated, check that the locked doors unlock Operation Check.

OK:

Locked doors unlock.

NG -- GO TO POWER DOOR LOCK CONTROL SYSTEM Problem Symptoms Table
OK -- Continue to next step.

2. READ VALUE USING TECHSTREAM (DOOR LOCK POSITION 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 / Main Body / Data List.

(e) Read the Data List according to the display on the Techstream.

Main Body (Main Body ECU (Instrument Panel Junction Block))





OK:

On the Techstream screen, the display changes between ON and OFF as shown in the chart above.

Result:





B -- GO TO POWER DOOR LOCK CONTROL SYSTEM Only Driver Door Lock / Unlock Functions Do Not Operate
A -- Continue to next step.

3. READ VALUE ON TECHSTREAM (DOOR OUTSIDE HANDLE)

(a) Enter the following menus: Body Electrical / Smart Key / Data List.

(b) Read the Data List according to the display on the Techstream.

Smart Key (Certification ECU (Smart Key ECU Assembly)):





OK:

On the Techstream screen, the display changes between ON and OFF as shown in the chart above.

NG -- CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - DOOR ELECTRICAL KEY OSCILLATOR)

OK -- REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Removal

4. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - DOOR ELECTRICAL KEY OSCILLATOR)

(a) Disconnect the certification ECU (smart key ECU assembly) and door electrical key oscillator connectors.





(b) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

5. CHECK HARNESS AND CONNECTOR (DOOR ELECTRICAL KEY OSCILLATOR - FRONT DOOR OUTSIDE HANDLE)

(a) Remove the front door outside handle Service and Repair.

(b) Disconnect the touch sensor connector.





(c) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

6. REPLACE DOOR ELECTRICAL KEY OSCILLATOR

(a) Replace the door electrical key oscillator Removal.

NEXT -- Continue to next step.

7. CHECK DOOR ELECTRICAL KEY OSCILLATOR (OPERATION)

(a) Check that the entry functions operate normally.

OK:

Entry functions operate normally.

NG -- REPLACE FRONT DOOR OUTSIDE HANDLE

OK -- END (DOOR ELECTRICAL KEY OSCILLATOR IS DEFECTIVE)

8. REPLACE FRONT DOOR OUTSIDE HANDLE

(a) Replace the front door outside handle RH Service and Repair.

NEXT -- Continue to next step.

9. CHECK FRONT DOOR OUTSIDE HANDLE (OPERATION)

(a) Check that the entry functions operate normally.

OK:

Entry functions operate normally.

NG -- REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Removal

OK -- END (FRONT DOOR OUTSIDE HANDLE IS DEFECTIVE)