Toyota Camry (XV70): Only Wireless Control Function is Inoperative

DESCRIPTION

The door control and tire pressure monitoring system receiver assembly receives signals from the door control transmitter module set sub-assembly and sends these signals to the main body ECU (multiplex network body ECU). The main body ECU (multiplex network body ECU) then controls all doors by sending lock/unlock signals to each door, and sends hazard flasher signals to the combination meter assembly.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

• Inspect the fuses for circuits related to this system before performing the following procedure.
• When replacing or inspecting the door control and tire pressure monitoring system receiver assembly and wire harness, do not change the position or length of the wire harness. If the wire harness is too close to the door control and tire pressure monitoring system receiver assembly, wireless function performance may be affected.
• When replacing the door control and tire pressure monitoring system receiver assembly, read the transmitter IDs (tire pressure warning system) stored in the old ECU using the Techstream and write them down before removal.

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• If the door control and tire pressure monitoring system receiver assembly has been replaced, it is necessary to perform initialization (Click here ) after registration (Click here ) of the transmitter IDs to the door control and tire pressure monitoring system receiver assembly.

PROCEDURE

(a) Check the power door lock operation.

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OK:

Locked doors unlock.

NG

GO TO POWER DOOR LOCK CONTROL SYSTEM

OK

(a) Check that the key reminder warning buzzer operates properly.

Click here

OK:

Key reminder warning buzzer operates properly.

NG

GO TO KEY REMINDER WARNING SYSTEM

OK

(a) When a known good registered door control transmitter module set sub-assembly is used, check that the wireless functions operate properly.

B

GO TO STEP 5

A

(a) Inspect the transmitter battery capacity.

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OK

REPLACE DOOR CONTROL TRANSMITTER MODULE SET SUB-ASSEMBLY

NG

REPLACE TRANSMITTER BATTERY

(a) Bring the door control transmitter module set sub-assembly near the door control and tire pressure monitoring system receiver assembly, and perform wireless operation check.

HINT:

• When the door control transmitter module set assembly is brought near the door control and tire pressure monitoring system receiver assembly, the possibility of wave interference decreases, and it can be determined if wave interference is causing the problem symptom.
• If the inspection result is 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 functions operate properly.

OK

END (AFFECTED BY WAVE INTERFERENCE)

NG

(a) Switch to self-diagnostic mode.

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(b) Check self-diagnostic mode.

Click here

A

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

C

GO TO STEP 8

B

(a) Check that the system can be switched to rewrite mode or add mode, and that a recognition code can be registered.

Click here

OK:

Recognition code can be registered.

OK

END (GO TO OPERATION CHECK)

NG

GO TO STEP 12

(a) Prepare a door control transmitter module set sub-assembly from another vehicle.

(b) Press and hold a door control transmitter module set sub-assembly switch.

(c) Check that an unmatching recognition code is output.

OK:

Unmatching recognition code is output.

NG

REPLACE DOOR CONTROL TRANSMITTER MODULE SET SUB-ASSEMBLY

OK

(a) Disconnect the R120 door control and tire pressure monitoring system receiver assembly connector.

*a Front view of wire harness connector (to Door Control and Tire Pressure Monitoring System Receiver Assembly)

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

Standard Resistance:

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

Standard Voltage:

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

(a) Reconnect the R120 door control and tire pressure monitoring system receiver assembly connector.

(b) Measure the voltage according to the value(s) in the table below. Standard Voltage: Tester Connection Condition Specified Condition R120-4 (RDA) - Body ground Procedure: Remove key from ignition key cylinder Close all doors Press lock or unlock switch of door control transmitter module set sub-assembly 11 to 14 V > pulse generation

*a Component with harness connected (Door Control and Tire Pressure Monitoring System Receiver Assembly)

OK

REPLACE DOOR CONTROL AND TIRE PRESSURE MONITORING SYSTEM RECEIVER ASSEMBLY

NG

(a) Disconnect the K53 main body ECU (multiplex network body ECU) connector.

(b) Disconnect the R120 door control and tire pressure monitoring system receiver assembly connector.

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

Standard Resistance:

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

(a) Temporarily replace the door control and tire pressure monitoring system receiver assembly with a new or known good one.

Click here

NEXT

(a) Perform the Registration procedure.

Click here

NEXT

(a) Check that the doors can be locked and unlocked by the door control transmitter module set sub-assembly lock and unlock switches.

OK:

Doors can be locked and unlocked by the door control transmitter module set sub-assembly.

OK

END (DOOR CONTROL AND TIRE PRESSURE MONITORING SYSTEM RECEIVER ASSEMBLY WAS DEFECTIVE)

NG

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

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