THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM(for Entry Function): Driver Side Door Entry Lock and Unlock Functions do not Operate; 2016 - 2020 MY Sienna [12/2015

Last Modified: 04-05-2023	6.11:8.1.0	Doc ID: RM100000000VJK8
Model Year Start: 2016	Model: Sienna	Prod Date Range: [12/2015 - ]
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM(for Entry Function): Driver Side Door Entry Lock and Unlock Functions do not Operate; 2016 - 2020 MY Sienna [12/2015 - ]

Driver Side Door Entry Lock and Unlock Functions do not Operate

DESCRIPTION

When the entry lock and unlock functions do not operate only for the driver door, an error in output request codes from the driver 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 driver side), and perform a driver door entry lock and unlock operation check.

Text in Illustration

*a	Approximately 0.3 m (0.984 ft.)

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 driver 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 driver side) connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
D88-3 (CLG1) - p1-6 (ANT1)	Always	Below 1 Ω
D88-4 (CG1B) - p1-3 (ANT2)	Always	Below 1 Ω
D88-32 (POS1) - p1-5 (B)	Always	Below 1 Ω
D88-3 (CLG1) - Body ground	Always	10 kΩ or higher
D88-4 (CG1B) - Body ground	Always	10 kΩ or higher
D88-32 (POS1) - Body ground	Always	10 kΩ or higher
p1-6 (ANT1) - Body ground	Always	10 kΩ or higher
p1-3 (ANT2) - Body ground	Always	10 kΩ or higher
p1-5 (B) - Body ground	Always	10 kΩ or higher

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
p1-2 (GND) - Body ground	Always	Below 1 Ω

Text in Illustration

*a	Front view of wire harness connector (to Front Door Outside Handle Assembly (for Driver 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 Voltage:

Tester Connection	Switch Condition	Specified Condition
p1-6 (ANT1) - p1-3 (ANT2)	Engine switch off All doors closed Key not in cabin	No pulse generation
p1-6 (ANT1) - p1-3 (ANT2)	Engine switch off All doors closed Key not in cabin All doors locked by wireless lock function	Pulse generation
p1-5 (B) - p1-2 (GND)	Engine switch off	9 to 14 V
p1-5 (B) - p1-2 (GND)	Engine switch on (IG)	Below 2 V

Text in Illustration

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

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(See page )

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

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

7.	CHECK FRONT DOOR OUTSIDE HANDLE ASSEMBLY (for Driver 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)

(See page )