Front Passenger Side Door Entry Unlock Function Does Not Operate

THEFT DETERRENT / KEYLESS ENTRY: SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Entry Function): Front Passenger Side Door Entry Unlock Function does not Operate
- Front Passenger Side Door Entry Unlock Function does not Operate

DESCRIPTION

If the front passenger side 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. The part at fault may be a touch sensor circuit (certification ECU [smart key ECU assembly] -> front passenger side door outside handle -> front passenger side door electrical key oscillator).

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK POWER DOOR LOCK OPERATION

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

OK:

Door locks operate normally.

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

2. READ VALUE USING TECHSTREAM (TOUCH SENSOR)

(a) Using the Techstream, read the Data List.

Smart Access





OK:

"ON" (sensor is touched) and "OFF" (sensor is not touched) appears on the screen.

NG -- CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] - DOOR ELECTRICAL KEY OSCILLATOR)

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

3. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] - DOOR ELECTRICAL KEY OSCILLATOR)

(a) Disconnect the E29 ECU connector.





(b) Disconnect the z22 oscillator 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.

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

(a) Disconnect the z21 handle connector.





(b) Disconnect the z22 oscillator 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.

5. REPLACE DOOR ELECTRICAL KEY OSCILLATOR

(a) Replace the door electrical key oscillator Disassembly.

NEXT -- Continue to next step.

6. CHECK DOOR ELECTRICAL KEY OSCILLATOR OPERATION

(a) Check that the entry function operates normally.

OK:

Operates normally.

NG -- REPLACE FRONT DOOR OUTSIDE HANDLE

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

7. REPLACE FRONT DOOR OUTSIDE HANDLE

(a) Replace the front door outside handle Disassembly.

NEXT -- Continue to next step.

8. CHECK FRONT DOOR OUTSIDE HANDLE OPERATION

(a) Check that the entry function operates normally.

OK:

Operates normally.

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

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