Toyota Tundra. Manual — part 342

Fig. 59: 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

4. 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.

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra

Fig. 60: Identifying Q7 Receiver Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Standard resistance

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

Standard voltage

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

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

5. REPLACE DOOR CONTROL RECEIVER

a. Temporarily replace the door control receiver with a new or normally functioning one.

1. For Regular Cab, refer to the following procedures (see DOOR CONTROL RECEIVER

(FOR REGULAR CAB) ).

2. For Double Cab, refer to the following procedures (see DOOR CONTROL RECEIVER

(FOR DOUBLE CAB) ).

3. For CrewMax, refer to the following procedures (see DOOR CONTROL RECEIVER

(FOR CREWMAX) ).

b. Perform the REGISTRATION procedures (see REGISTRATION ).

6. CLEAR DTC

Tester Connection

Condition Specified Condition

Q7-1 (GND) - Body ground Always

Below 1 ohms

Tester Connection

Condition Specified Condition

Q7-5 (+B) - Body ground Always

11 to 14 V

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra

a. Clear the DTC (see DTC CHECK/CLEAR ).

7. CHECK FOR DTC

a. Check for DTC (see DTC CHECK/CLEAR ).

OK: DTC B1242 is not output.

NG: REPLACE MAIN BODY ECU

OK: END (DOOR CONTROL RECEIVER IS DEFECTIVE)

ONLY WIRELESS CONTROL FUNCTION IS INOPERATIVE

DESCRIPTION

The door control receiver receives signals from the transmitter and sends these signals to the main body ECU.
The main body ECU then controls all doors by sending lock/unlock signals to each door.

WIRING DIAGRAM

Fig. 61: Door Control Receiver Receives - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra

INSPECTION PROCEDURE

1. CHECK POWER DOOR LOCK OPERATION FUNCTION

a. Check the power door lock operation function (see OPERATION CHECK ).

OK: Each door locks and unlocks normally.

NG: Go to POWER DOOR LOCK CONTROL SYSTEM (see PROBLEM SYMPTOMS TABLE )

OK: Go to next step

2. CHECK KEY REMINDER WARNING OPERATION FUNCTION

a. Check the key reminder buzzer operation function (see OPERATION CHECK ).

HINT:

If the key reminder buzzer is functioning normally, it can be assumed that the unlock warning
switch is also functioning normally.

OK: Key reminder buzzer operates normally.

NG: Go to KEY REMINDER WARNING SYSTEM (see PROBLEM SYMPTOMS TABLE )

OK: Go to next step

3. CHECK WIRELESS DOOR CONTROL TRANSMITTER

a. Check whether the wireless door lock control functions operate normally with another registered

vehicle transmitter.

OK: Wireless door control functions operate normally

NG: Go to step 5

OK: Go to next step

4. CHECK TRANSMITTER BATTERY

a. Remove the battery from the inoperative wireless door control transmitter (see

REPLACEMENT ).

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

Standard voltage

TRANSMITTER BATTERY STANDARD VOLTAGE SPECIFICATION

Tester Connection

Condition Specified Condition

Battery positive (+) side - Battery negative (-) side Always

2.5 to 3.2 V

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra