Check Output Signal Of The Body Integrated Unit

DIAGNOSTIC PROCEDURE CHART

Step	Check	Yes	No
1 CHECK OUTPUT SIGNAL. Measure the voltage between the keyless entry control module harness connector terminal and the chassis ground when the UNLOCK/DISARM buttons of the keyless transmitter are pressed. Connector & terminal (B176) No. 18 (+) - Chassis ground (-):	Is the voltage more than 10 V?	Go to step 2.	Replace the keyless entry control module.
2 CHECK OUTPUT SIGNAL. Measure the voltage between the keyless entry control module harness connector terminal and the chassis ground when the LOCK/ARM buttons of the keyless transmitter are pressed. Connector & terminal (B176) No. 19 (+) - Chassis ground (-):	Is the voltage more than 10 V?	Go to step 3.	Replace the keyless entry control module.
3 CHECK HARNESS BETWEEN KEYLESS ENTRY CONTROL MODULE AND BODY INTEGRATED UNIT. Disconnect the keyless entry control module harness connector and the body integrated unit harness connector. Measure the resistance between keyless entry control module harness connector terminal and body integrated unit harness connector terminal. Connector & terminal (B176) No. 18 - (B281) No. 14: (B176) No. 19 - (B281) No. 13:	Is the resistance less than 10 Ω?	Replace the body integrated unit.	Check the harness for open or short circuit between the keyless entry control module and the body integrated unit.

Step

Check

Yes

1 CHECK OUTPUT SIGNAL.
Measure the voltage between the keyless entry control module harness connector terminal and the chassis ground when the UNLOCK/DISARM buttons of the keyless transmitter are pressed.

Connector & terminal

(B176) No. 18 (+) - Chassis ground (-):

Is the voltage more than 10 V?

Go to step 2.

Replace the keyless entry control module.

2 CHECK OUTPUT SIGNAL.
Measure the voltage between the keyless entry control module harness connector terminal and the chassis ground when the LOCK/ARM buttons of the keyless transmitter are pressed.

Connector & terminal

(B176) No. 19 (+) - Chassis ground (-):

Is the voltage more than 10 V?

Go to step 3.

Replace the keyless entry control module.

3 CHECK HARNESS BETWEEN KEYLESS ENTRY CONTROL MODULE AND BODY INTEGRATED UNIT.

Disconnect the keyless entry control module harness connector and the body integrated unit harness connector.
Measure the resistance between keyless entry control module harness connector terminal and body integrated unit harness connector terminal.
Connector & terminal

(B176) No. 18 - (B281) No. 14:

(B176) No. 19 - (B281) No. 13:

Is the resistance less than 10 Ω?

Replace the body integrated unit.

Check the harness for open or short circuit between the keyless entry control module and the body integrated unit.