Immobilizer-Keyless Control Unit Input Test

SRS components are located in this area. Review the SRS component locations and the precautions and procedures before doing repairs or service.

NOTE:

Make sure the fuses associated with the system are OK.
If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A .

1. Turn the vehicle to the OFF (LOCK) mode.

2. Disconnect the immobilizer-keyless control unit 7P connector.

Immobilizer-Keyless Control Unit 7P Connector (female terminals)

Courtesy of HONDA, U.S.A., INC.

Inspect the connector and socket terminals to be sure they are all making good contact:

If the terminals are bent, loose, or corroded, repair them as necessary, and recheck the system.
If the terminals are OK, go to step 4.

Reconnect the connector to the immobilizer-keyless control unit, do the following input tests:

If any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, replace the immobilizer-keyless control unit .

NOTE: After replacing the immobilizer-keyless control unit, and do the immobilizer key registration .

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
7	WHT	Under all conditions	Measure the voltage to ground:There should be battery voltage.	An open or high resistance in the wire
6	PUR* 1BLU* 2	Vehicle ON mode	Measure the voltage to ground:There should be battery voltage.	An open or high resistance in the wire
1	BRN	In all power modes	Measure the voltage to ground:There should be less than 0.2 V.	Poor ground (G401) An open or high resistance in the ground wire
3	LT BLU	Under all conditions	Measure the voltage to ground:There should be pulse voltage (digital signal).	Faulty control unit on the K LINE Short to ground in the K LINE wire

*1: 1.5L engine

*2: 2.4L engine