Rear Door LH Entry Unlock Function Does Not Operate

THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function): Rear Door LH Entry Unlock Function does not Operate
- Rear Door LH Entry Unlock Function does not Operate

DESCRIPTION

If the driver side rear 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] -> driver side rear door outside handle -> driver side rear 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 Operation Check
OK -- Continue to next step.

2. READ VALUE USING TECHSTREAM (TOUCH SENSOR)

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

Smart Key





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 E30 ECU connector.





(b) Disconnect the z28 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 - REAR DOOR OUTSIDE HANDLE)

(a) Disconnect the z27 handle connector.





(b) Disconnect the z28 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 REAR DOOR OUTSIDE HANDLE

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

7. REPLACE REAR DOOR OUTSIDE HANDLE

(a) Replace the rear door outside handle Disassembly.

NEXT -- Continue to next step.

8. CHECK REAR 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 (REAR DOOR OUTSIDE HANDLE IS DEFECTIVE)