Toyota Venza: Driver Side Door Entry Lock Function does not Operate

Toyota Venza Service Manual / Theft Deterrent / Keyless Entry / Smart Key System(for Entry Function) / 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 this case, a malfunction in the lock sensor circuit (from the certification ECU (smart key ECU assembly) to the front door outside handle assembly (lock sensor)) 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.	READ VALUE USING TECHSTREAM (DOOR LOCK POSITION SWITCH)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(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 (Driver Side junction Block Assembly))

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
D-Door Lock Pos SW	Driver door lock position switch signal/LOCK or UNLOCK	ON: Driver side door is unlocked OFF: Driver side door is locked	-

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

D-Door Lock Pos SW

Driver door lock position switch signal/LOCK or UNLOCK

ON: Driver side door is unlocked

OFF: Driver side door is locked

OK:

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

GO TO LIGHTING SYSTEM (Proceed to Door Unlock Detection Switch Circuit)

3.	READ VALUE USING 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))

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
D-Door Trigger SW	Driver side door lock switch / ON or OFF	ON: Entry lock switch pressed OFF: Entry lock switch not pressed	-

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

D-Door Trigger SW

Driver side door lock switch / ON or OFF

ON: Entry lock switch pressed

OFF: Entry lock switch not pressed

OK:

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

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

4.	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
D25-18 (TSW1) - z3-1 (TRG+)	Always	Below 1 Ω
D25-18 (TSW1) - Body ground	Always	10 kΩ or higher
z3-1 (TRG+) - 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 Driver Side))

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.	INSPECT CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (LOCK SENSOR SIGNAL INPUT)

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

(b) Reconnect the front door outside handle assembly (for driver side) connector.

Standard:

Tester Connection	Condition	Specified Condition
D25-18 (TSW1) - D25-15 (E)	Engine switch off All door closed Lock sensor (for driver side) not touched	Pulse generation
D25-18 (TSW1) - D25-15 (E)	Engine switch off All door closed Lock sensor (for driver side) touched	Below 2 V

Text in Illustration

*1	Component with harness connected (Certification ECU (Smart Key ECU Assembly))

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

REPLACE FRONT DOOR OUTSIDE HANDLE ASSEMBLY (for Driver Side)

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Front Passenger Side Door Entry Lock Function does not Operate

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

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