Toyota Tundra. Manual — part 343

NG: REPLACE TRANSMITTER BATTERY (see REPLACEMENT )

OK: REPLACE DOOR CONTROL TRANSMITTER

5. CHECK ELECTRICAL NOISE

a. Move the transmitter near the vicinity of the door control receiver.

HINT:



For Regular Cab, refer to the PARTS LOCATION for the location of the door control
receiver (see DOOR CONTROL RECEIVER (FOR REGULAR CAB) ).



For Double Cab, refer to the PARTS LOCATION for the location of the door control
receiver (see DOOR CONTROL RECEIVER (FOR DOUBLE CAB) ).



For CrewMax, refer to the PARTS LOCATION for the location of the door control receiver
(see DOOR CONTROL RECEIVER (FOR CREWMAX) ).

b. Press and hold either the LOCK or UNLOCK transmitter switch for 1 second, and check that the

doors are locked or unlocked accordingly.

OK: Wireless door control functions operate normally

HINT:



Check if electrical noise is the cause by moving the door control transmitter closer to the
door control receiver. Moving closer will decrease the effects of electrical noise.



If the operation check can be performed normally, there is a high probability that electrical
noise or a decrease in outputs from the door control transmitter was the cause. There is a high
probability that electrical noise was the cause if the problem occurs only in a certain location
or only during a certain time of day. Also, custom components may be causing electrical
noise. If custom components are installed in the vehicle, remove them and perform the
operation check again.

NG: Go to step 6

OK: FIND CAUSE OF ELECTRICAL NOISE AND REMOVE IT

6. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - DOOR CONTROL RECEIVER)

a. Disconnect the J3 ECU connector.

b. Disconnect the Q7 receiver connector.

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

Standard resistance

HARNESS AND CONNECTOR (MAIN BODY ECU - DOOR CONTROL RECEIVER)
STANDARD RESISTANCE SPECIFICATION

Tester Connection

Condition Specified Condition

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra

Fig. 62: Identifying J3 ECU And Q7 Receiver Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

7. CHECK HARNESS AND CONNECTOR (DOOR CONTROL RECEIVER - BATTERY AND

BODY GROUND)

a. Disconnect the Q7 receiver connector.

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

J3-12 (RDA) - Q7-2 (RDA)

Always

Below 1 ohms

J3-10 (PRG) - Q7-3 (PRG)

J3-12 (RDA) - Q7-2 (RDA) - Body ground

Always

10 kohms or higher

J3-10 (PRG) - Q7-3 (PRG) - Body ground

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra

Fig. 63: Identifying Q7 Receiver Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Standard voltage

HARNESS AND CONNECTOR (DOOR CONTROL RECEIVER - BATTERY AND BODY
GROUND) STANDARD VOLTAGE SPECIFICATION

Standard resistance

HARNESS AND CONNECTOR (DOOR CONTROL RECEIVER - BATTERY AND BODY
GROUND) STANDARD RESISTANCE SPECIFICATION

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

8. CHECK DOOR CONTROL RECEIVER (OUTPUT)

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

Standard voltage

DOOR CONTROL RECEIVER (OUTPUT) STANDARD VOLTAGE SPECIFICATION

Tester Connection

Condition Specified Condition

Q7-5 (+B) - Body Ground Always

11 to 14 V

Tester Connection

Condition Specified Condition

Q7-1 (GND) - Body ground Always

Below 1 ohms

Tester

Connection

Tool Setting

Switch Condition

Specified

Condition

Q7-2 (RDA) -

Body ground

10V/DIV., 50

µsec./DIV.

Transmitter switch ON --> OFF (No key in
ignition key cylinder, all doors closed)

Pulse

generation

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra

Fig. 64: Identifying Door Control Receiver Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

OK: Door control receiver outputs pulse generation.

Result

DOOR CONTROL RECEIVER (OUTPUT) RESULT REFERENCE

B: REPLACE DOOR CONTROL RECEIVER (see REMOVAL (FOR REGULAR CAB) )

C: REPLACE DOOR CONTROL RECEIVER (see REMOVAL (FOR DOUBLE CAB) )

D: REPLACE DOOR CONTROL RECEIVER (see DOOR CONTROL RECEIVER (FOR
CREWMAX) )

Result

Proceed to

OK

A

NG (for Regular Cab)

B

NG (for Double Cab)

C

NG (for CrewMax)

D

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra