Honda HR-V: DTC B1128 Driver's Door Remote Switch Input Circuit Malfunction (Simultaneous Input of Lock and Unlock Signal)

DTC (MICU)

NOTE : If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A - Refer to: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks.

1. Keyless/power door locks/security system check 1:

1. With the driver's door lock switch in the neutral position, check the parameter(s) below with the HDS.

Is either information indicator ON?

YES

Go to step 4.

NO

Go to step 2.

2. Keyless/power door locks/security system check 2:

1. With the driver's door lock switch in the lock position, check the parameter(s) below with the HDS.

Are both information indicators ON?

YES

Go to step 3.

NO

Intermittent failure, the system is OK at this time.

3. Shorted wire check (REMOTE SW UNLOCK to REMOTE SW LOCK line):

1. Turn the vehicle to the OFF (LOCK) mode.
2. Disconnect the following connector.

Power window master switch 24P connector

3. Connect terminals A and B with a jumper wire.

4. Check the parameter(s) below with the HDS.

Are both information indicators ON?

YES

Repair a short between the wires.

NO

The REMOTE SW UNLOCK to REMOTE SW LOCK wire is OK. Faulty driver's door lock switch; replace the power window master switch.

4. Keyless/power door locks/security system check 3:

1. Turn the vehicle to the OFF (LOCK) mode.
2. Disconnect the following connector.

Power window master switch 24P connector

3. Check the parameter(s) below with the HDS.

Is either information indicator ON?

YES

Go to step 5.

NO

Faulty driver's door lock switch; replace the power window master switch.

5. Shorted wire check (REMOTE SW UNLOCK, REMOTE SW LOCK lines):

1. Turn the vehicle to the OFF (LOCK) mode.
2. Disconnect the following connector.

Under-dash fuse/relay box connector D (24P)

3. Check for continuity between test points 1 and 2 individually.

Are there continuity?

YES

Repair a short to ground in the wire(s).

NO

The REMOTE SW UNLOCK and REMOTE SW LOCK wires are OK. Faulty MICU; replace the under-dash fuse/relay box.

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