Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.

CHECK POWER DOOR LOCK OPERATION FUNCTION
1. 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
CHECK KEY REMINDER WARNING OPERATION FUNCTION
1. 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
CHECK WIRELESS DOOR CONTROL TRANSMITTER
1. 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

CHECK TRANSMITTER BATTERY

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

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

NG: REPLACE TRANSMITTER BATTERY (see REPLACEMENT )

OK: REPLACE DOOR CONTROL TRANSMITTER

CHECK ELECTRICAL NOISE
1. 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) ).
2. 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

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

Disconnect the J3 ECU connector.
Disconnect the Q7 receiver connector.

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
J3-12 (RDA) - Q7-2 (RDA)	Always	Below 1 Ω
J3-10 (PRG) - Q7-3 (PRG)	Always	Below 1 Ω
J3-12 (RDA) - Q7-2 (RDA) - Body ground	Always	10 kΩ or higher
J3-10 (PRG) - Q7-3 (PRG) - Body ground	Always	10 kΩ or higher

Fig 1: Identifying J3 ECU And Q7 Receiver Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

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

Disconnect the Q7 receiver connector.

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

Fig 2: Identifying Q7 Receiver Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard voltage

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

Tester Connection	Condition	Specified Condition
Q7-5 (+B) - Body Ground	Always	11 to 14 V

Standard resistance

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

Tester Connection	Condition	Specified Condition
Q7-1 (GND) - Body ground	Always	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

CHECK DOOR CONTROL RECEIVER (OUTPUT)

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

Standard voltage

DOOR CONTROL RECEIVER (OUTPUT) STANDARD VOLTAGE SPECIFICATION

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

Fig 3: Identifying Door Control Receiver Connector

OK: Door control receiver outputs pulse generation.

Result

DOOR CONTROL RECEIVER (OUTPUT) RESULT REFERENCE

Result	Proceed to
OK	A
NG (for Regular Cab)	B
NG (for Double Cab)	C
NG (for CrewMax)	D

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) )

A: REPLACE MAIN BODY ECU