Honda HR-V: DTC B1127 Driver's Door Key Cylinder 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. Problem verification (driver's door key cylinder switch in the neutral
position):
- With the driver's door key cylinder 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. Problem verification (driver's door key cylinder switch in the lock
position):
- With the driver's door key cylinder 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 (DR KEY CYL UNLOCK to DR KEY CYL LOCK line):
- Turn the vehicle to the OFF (LOCK) mode.
- Disconnect the following connector.
Driver's door latch 10P connector
- Connect terminals A and B with a jumper wire.
- Check the parameter(s) below with the HDS.
Are both information indicators ON?
YES
Repair a short between the wires.
NO
The DR KEY CYL UNLOCK to DR KEY CYL LOCK wire is OK. Faulty driver's door key
cylinder
switch; replace the driver's door latch.
4. Determine possible failure area (driver's door latch, others):
- Turn the vehicle to the OFF (LOCK) mode.
- Disconnect the following connector.
Driver's door latch 10P connector
- Check the parameter(s) below with the HDS.
Is either information indicator ON?
YES
Go to step 5.
NO
Faulty driver's door key cylinder switch; replace the driver's door latch.
5. Shorted wire check (DR KEY CYL UNLOCK, DR KEY CYL LOCK lines):
- Turn the vehicle to the OFF (LOCK) mode.
- Disconnect the following connector.
Under-dash fuse/relay box connector D (24P)
- Check for continuity between test points 1 and 2 individually.
Is there continuity?
YES
Repair a short to ground in the wire(s).
NO
The DR KEY CYL UNLOCK and DR KEY CYL LOCK wires are OK. Faulty MICU; replace
the
under-dash fuse/relay box.
READ NEXT:
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
Diagn
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
Diagn
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
Diagn
SEE MORE:
COMMUNICATION SYSTEMS DESCRIPTION (F-CAN) - OVERVIEW
F-CAN (High-speed CAN)
The network between the powertrain and control units for chassis system is
called F-CAN and it employs high
speed CAN with communication rate at 500 kbps.
Typical CAN Bus Communication Operation
The F-CAN detects the diffe
■Vehicle Specifications
*1: 2WD
*2: AWD
■Engine Specifications
■Fuel
■Washer Fluid
■Light Bulbs
■Brake Fluid
■Continuously Variable Transmission
Fluid*
*1: 2WD
*2: AWD
■Manual Transmission Fluid*
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