DTC B1128: Driver's Door Remote Switch Input Circuit Malfunction (Simultaneous input of lock and unlock signal)
| DTC Description | DTC |
|---|---|
| B1128 Driver's door remote switch input Circuit Malfunction (Simultaneous input of lock and unlock signal) |
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 ChecksBody Electrical Troubleshooting - B-CAN System Diagnosis Test Mode 1 and Test Mode 2 (without the HDS)Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode B - Control Unit Not CommunicatingBody Electrical Troubleshooting - B-CAN System Diagnosis Test Mode C - No DTCs and Output Won't Shut OFFBody Electrical Troubleshooting - B-CAN System Diagnosis Test Mode D - No DTCs and Output Won't Turn ON .
NOTE: Refer to the Electrical Wiring Diagrams for the location of the under-dash fuse/relay box connectors.
- 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.
Signal Current conditions Values Unit Driver's Door Lock Switch(LOCK) Driver's Door Lock Switch(UNLOCK) 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.
Signal Current conditions Values Unit Driver's Door Lock Switch(LOCK) Driver's Door Lock Switch(UNLOCK) 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 26P connector 3. Connect terminals A and B with a jumper wire.
Terminal A Under-dash fuse/relay box connector X (10P) No. 8 Terminal B Body ground 4. Check the parameter(s) below with the HDS.
Signal Current conditions Values Unit Driver's Door Lock Switch(LOCK) Driver's Door Lock Switch(UNLOCK) 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 door lock switch; replace the power window master switch .
- 4. Keyless/power door locks/security system check 2:
1. Turn the vehicle to the OFF (LOCK) mode.
2. Disconnect the following connector.
Power window master switch 26P connector 3. Check the parameter(s) below with the HDS.
Signal Current conditions Values Unit Driver's Door Lock Switch(LOCK) Driver's Door Lock Switch(UNLOCK) Is either information indicator ON?
YES
Go to step 5.
NO
Faulty 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 X (10P) 3. Check for continuity between test points 1 and 2 individually.
Test condition Vehicle OFF (LOCK) mode Power window master switch 26P connector: disconnected
Under-dash fuse/relay box connector X (10P): disconnected
Test point 1 Under-dash fuse/relay box connector X (10P) No. 7 Test point 2 Body ground Test point 1 Under-dash fuse/relay box connector X (10P) No. 8 Test point 2 Body ground Are there continuity?
YES
Repair a short to ground in the wire.
NO
The REMOTE SW UNLOCK and REMOTE SW LOCK wires are OK. Faulty MICU; replace the under-dash fuse/relay box .