Toyota Venza: Front Passenger Side Door Entry Lock and Unlock Functions do not Operate

Toyota Venza Service Manual / Theft Deterrent / Keyless Entry / Smart Key System(for Entry Function) / Front Passenger Side Door Entry Lock and Unlock Functions do not Operate

DESCRIPTION

When the entry lock and unlock functions do not operate only for the front passenger door, an error in output request codes from the front passenger door or malfunction in the front door outside handle assembly is suspected. If the entry functions for the other doors operate normally, then the communication circuit between the key and door control receiver assembly is functioning normally. In this case, radio wave interference or a malfunction in the request code sending circuit (from the certification ECU (smart key ECU assembly) to the front door outside handle assembly (for driver side)) is suspected.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

The smart key system (for entry function) uses a multiplex communication system (LIN communication system) and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting (See page ). Troubleshoot the smart
key system (for entry function) after confirming that the communication system is functioning properly.
Confirm that another key is not in the cabin.

PROCEDURE

1.	CHECK POWER DOOR LOCK OPERATION

(a) When the door control switch on the master switch assembly is operated, check that the doors unlock and lock according to switch operation (See page ).

OK:

Door locks operate normally.

GO TO POWER DOOR LOCK CONTROL SYSTEM (Proceed to Problem Symptoms Table)

2.	CHECK WAVE ENVIRONMENT

(a) Bring the key near the front door outside handle assembly (for front passenger side), and perform a front passenger door entry lock and unlock operation check.

NOTICE:

If the key is brought within 0.2 m (0.656 ft.) of the door outside handle assembly, communication is not possible.

HINT:

When the key is brought near the front door outside handle assembly (for front passenger side), the possibility of wave interference decreases, and it can be determined if wave interference is causing the problem symptom.
If the operation is normal, the possibility of wave interference is high. Also, added vehicle components may cause wave interference. If installed, remove them and perform the operation check.

OK:

Entry functions operate normally.

AFFECTED BY WAVE INTERFERENCE

3.	CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - FRONT DOOR OUTSIDE HANDLE)

(a) Disconnect the certification ECU (smart key ECU assembly) connector.

(b) Disconnect the front door outside handle assembly (for front passenger side) connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
D25-5 (CLG2) - z4-6 (ANT1)	Always	Below 1 Ω
D25-6 (CG2B) - z4-3 (ANT2)	Always	Below 1 Ω
D25-33 (POS2) - z4-5 (B)	Always	Below 1 Ω
D25-5 (CLG2) - Body ground	Always	10 kΩ or higher
D25-6 (CG2B) - Body ground	Always	10 kΩ or higher
D25-33 (POS2) - Body ground	Always	10 kΩ or higher
z4-6 (ANT1) - Body ground	Always	10 kΩ or higher
z4-3 (ANT2) - Body ground	Always	10 kΩ or higher
z4-5 (B) - Body ground	Always	10 kΩ or higher

Text in Illustration

Front view of wire harness connector

(to Certification ECU (Smart Key ECU Assembly))

Front view of wire harness connector

(to Front Door Outside Handle Assembly (for Front Passenger Side))

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	CHECK HARNESS AND CONNECTOR (FRONT DOOR OUTSIDE HANDLE - BODY GROUND)

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
z4-2 (GND) - Body ground	Always	Below 1 Ω

Text in Illustration

*1	Front view of wire harness connector (to Front Door Outside Handle Assembly (for Front Passenger Side))

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.	INSPECT FRONT DOOR OUTSIDE HANDLE ASSEMBLY (DOOR OSCILLATOR, LOCK/UNLOCK SENSOR SIGNAL INPUT)

(a) Reconnect the certification ECU (smart key ECU assembly) connector.

(b) Measure the voltage and check for pulses according to the value(s) in the table below.

Standard:

Tester Connection	Condition	Specified Condition
z4-6 (ANT1) - z4-3 (ANT2)	Engine switch off All door closed Key not in cabin	No pulse generation
z4-6 (ANT1) - z4-3 (ANT2)	Engine switch off All door closed Key not in cabin All doors locked by wireless lock function	Pulse generation
z4-5 (B) - z4-2 (GND)	Engine switch off	9 to 14 V
z4-5 (B) - z4-2 (GND)	Engine switch on (IG)	Below 2 V

Text in Illustration

*1	Front view of wire harness connector (to Front Door Outside Handle Assembly (for Front Passenger Side))

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

6.	REPLACE FRONT DOOR OUTSIDE HANDLE ASSEMBLY (for Front Passenger Side)

(a) Replace the front door outside handle assembly (for front passenger side) (See page ).

7.	CHECK FRONT DOOR OUTSIDE HANDLE ASSEMBLY (for Front Passenger Side)

(a) Check that the entry functions operate normally (See page ).

OK:

Entry functions operate normally.

END (FRONT DOOR OUTSIDE HANDLE ASSEMBLY WAS DEFECTIVE)

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

Front Passenger Side Door Entry Unlock Function does not Operate

DESCRIPTION If the front passenger door entry lock function operates normally, but its entry unlock function does not, this means that the request code from the front passenger door is being outp ...

Driver Side Door Entry Lock Function does not Operate

DESCRIPTION If the driver door entry unlock function operates normally, but its entry lock function does not, this means that the request code from the driver door is being output normally. In th ...

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