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

DESCRIPTION

If the driver door entry lock function operates normally, but its entry unlock function does not, this means that the request code from the driver door is being output normally. In this case, a malfunction in the touch sensor circuit (from the certification ECU (smart key ECU assembly) to the front door outside handle assembly (touch sensor)) is suspected.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

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.

NG

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

OK

2.	READ VALUE USING TECHSTREAM (DOOR LOCK POSITION SWITCH)

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(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	-

OK:

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

NG

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

OK

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 Touch Sensor	Status of touch sensor (for driver side) / ON or OFF	ON: Touch sensor touched OFF: Touch sensor not touched	-

OK:

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

OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

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.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
D25-20 (SEN1) - z3-4 (SENS)	Always	Below 1 Ω
D25-20 (SEN1) - Body ground	Always	10 kΩ or higher
z3-4 (SENS) - Body ground	Always	10 kΩ or higher

Text in Illustration

*1	Front view of wire harness connector (to Certification ECU (Smart Key ECU Assembly))
*2	Front view of wire harness connector (to Front Door Outside Handle Assembly (for Driver Side))

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5.	INSPECT CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (TOUCH 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.

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

Standard:

Tester Connection	Condition	Specified Condition
D25-20 (SEN1) - D25-15 (E)	Engine switch off All door closed Key not in detection area Touch sensor (for driver side) not touched	Pulse generation
D25-20 (SEN1) - D25-15 (E)	Engine switch off All door closed Key not in detection area Touch sensor (for driver side) touched	Below 2 V

Text in Illustration

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

OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

REPLACE FRONT DOOR OUTSIDE HANDLE ASSEMBLY (for Driver Side)