Toyota Venza: All Door Entry Lock/Unlock Functions and Wireless Functions do not Operate

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

DESCRIPTION

When the entry door lock and unlock functions and wireless door lock and unlock functions do not operate, radio wave interference, or a malfunction in the key or signal circuit between the door control receiver assembly and certification ECU (smart key ECU assembly) is suspected. The signal circuit is shared by the entry function and wireless door lock function.

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.
Before performing the inspection, check that DTC B1242 (wireless door lock control) is not output (See page
).
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 ELECTRICAL KEY TRANSMITTER

(a) Check if another registered key is available.

Result	Proceed to
Another registered key is not available.	A
Another registered key is available.	B

GO TO STEP 4

3.	REGISTER ELECTRICAL KEY TRANSMITTER

(a) Register a new key (See page ).

4.	CHECK ELECTRICAL KEY TRANSMITTER (OPERATION)

(a) Using the key registered in the previous step or another registered key, check that the entry function operates normally (See page ).

OK:

Entry function operates normally.

GO TO STEP 7

5.	CHECK ELECTRICAL KEY TRANSMITTER (LED)

(a) Check that the transmitter LED illuminates each time when the switch is pushed 3 times.

Result	Proceed to
Transmitter LED does not illuminate at all when switch is pushed 3 times.	A
Transmitter LED illuminates each time when switch is pushed 3 times.	B
Transmitter LED does not illuminate the second or third time.	C

HINT:

If the transmitter LED does not illuminate the second or third time, replace the transmitter battery as it is depleted.

REPLACE ELECTRICAL KEY TRANSMITTER

REPLACE TRANSMITTER BATTERY

6.	INSPECT TRANSMITTER BATTERY (VOLTAGE)

(a) Remove the battery from the key that does not operate. Attach a lead wire (0.6 mm (0.0236 in.) or less in diameter including wire sheath) with tape or equivalent to the negative (-) terminal (See page ).

NOTICE:

Do not wrap the wire around the terminal, wedge it between the terminals, or solder it. A terminal may be deformed or damaged, and the battery will not be able to be installed correctly.

(b) Carefully pull the lead wire out from the position shown in the illustration and install the previously removed transmitter battery.

HINT:

When measuring the battery voltage, while operating the lock switch of a door outside handle assembly, bring the key within the entry operating range to perform the measurement. For the entry operating range, refer to System Description (See page ).

Standard Voltage:

Item	Content
Tester Connection	Battery positive (+) - Battery negative (-)
Tool Setting	0.5 V/DIV., 100 ms/DIV.
Condition	Engine switch off, all doors closed and lock switch pushed
Specified Condition	2.2 to 3.2 V (Refer to the waveform)

REPLACE ELECTRICAL KEY TRANSMITTER

REPLACE TRANSMITTER BATTERY

7.	CHECK WAVE ENVIRONMENT

(a) Bring the key near the door control receiver, and check that the wireless function.

HINT:

When the key is brought near the door control receiver, the possibility of wave interference decreases, and it can be determined if wave interference is causing the problem symptom.
If the inspection result indicates that the problem only occurs in certain locations or times of day, 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:

Wireless function operates normally.

AFFECTED BY WAVE INTERFERENCE

8.	CHECK POWER SOURCE

(a) Check if functions other than the entry function operate when the engine switch is off.

Result	Proceed to
Other functions do not operate.	A
Other functions operate.	B

HINT:

Perform this check with using functions that do not require the engine switch to be on (ACC or IG) in order to operate.

GO TO SMART KEY SYSTEM (for Start Function) (Proceed to How to Proceed with Troubleshooting)

9.	INSPECT FUSES (EFI NO. 1, ECU-B)

(a) Remove the EFI NO. 1 and ECU-B fuses to the engine room relay block and junction block.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
EFI NO. 1 fuse	Always	Below 1 Ω
ECU-B fuse	Always	Below 1 Ω

REPLACE FUSE (EFI NO. 1, ECU-B)

10.	CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - BATTERY AND BODY GROUND)

(a) Install the EFI NO. 1 and ECU-B fuses to the engine room relay block and junction block.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
D25-1 (+B) - Body ground	Always	11 to 14 V
D25-17 (CUTB) - Body ground	Always	11 to 14 V

Standard Resistance:

Tester Connection	Condition	Specified Condition
D25-15 (E) - Body ground	Always	Below 1 Ω

Text in Illustration

*1	Front view of wire harness connector (to Certification ECU (Smart Key ECU Assembly))

REPAIR OR REPLACE HARNESS OR CONNECTOR

11.	CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - DOOR CONTROL RECEIVER)

(a) Disconnect the door control receiver assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
D26-5 (RC0) - M16-4 (+5)	Always	Below 1 Ω
D26-15 (RDA) - M16-5 (DATA)	Always	Below 1 Ω
D26-16 (RSSI) - M16-2 (RSSI)	Always	Below 1 Ω
D26-5 (RC0) - Body ground	Always	10 kΩ or higher
D26-15 (RDA) - Body ground	Always	10 kΩ or higher
D26-16 (RSSI) - Body ground	Always	10 kΩ or higher
M16-4 (+5) - Body ground	Always	10 kΩ or higher
M16-5 (DATA) - Body ground	Always	10 kΩ or higher
M16-2 (RSSI) - 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 Door Control Receiver Assembly)

REPAIR OR REPLACE HARNESS OR CONNECTOR

12.	CHECK HARNESS AND CONNECTOR (DOOR CONTROL RECEIVER - BODY GROUND)

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
M16-1 (GND) - Body ground	Always	Below 1 Ω

Text in Illustration

*1	Front view of wire harness connector (to Door Control Receiver Assembly)

REPAIR OR REPLACE HARNESS OR CONNECTOR

13.	INSPECT DOOR CONTROL RECEIVER ASSEMBLY (POWER SOURCE)

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

(b) Reconnect the door control receiver assembly connector.

Standard Voltage:

Tester Connection	Condition	Specified Condition
M16-4 (+5) - M16-1 (GND)	Engine switch off Lock or unlock switch on key not pushed	Below 1 V
M16-4 (+5) - M16-1 (GND)	Engine switch off Lock or unlock switch on key pushed	4.5 to 5.5 V

Text in Illustration

*1	Component with harness connected (Door Control Receiver Assembly)

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

14.	INSPECT DOOR CONTROL RECEIVER ASSEMBLY (DOOR CONTROL RECEIVER SIGNAL OUTPUT)

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
M16-2 (RSSI) - M16-1 (GND)	Engine switch off All doors locked Lock or unlock switch on key not pushed	11 to 14 V
M16-2 (RSSI) - M16-1 (GND)	Engine switch off All doors locked Lock or unlock switch on key pushed	Below 2 V
M16-5 (DATA) - M16-1 (GND)	Engine switch off	Pulse between 11 to 14 V occurs regularly

Text in Illustration

*1	Component with harness connected (Door Control Receiver Assembly)

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

REPLACE DOOR CONTROL RECEIVER ASSEMBLY

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