Honda HR-V: DTC B12C5 Engine Start/Stop Switch Failure
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DTC (Power Control Unit)
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:
- Clear the DTCs with the HDS.
Clear DTCs
- Press the engine start/stop button at least 20 times, then wait for at least 20 seconds.
- Check for DTCs with the HDS.
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Is DTC B12C5 indicated?
YES
Go to step 2.
NO
Intermittent failure, the system is OK at this time. Check for loose or poor connections.
2. Determine possible failure area (+B SMART line, SSB GND line, or other):
- Turn the vehicle to the OFF (LOCK) mode.
- Disconnect the following connector.
Engine start/stop switch 10P connector
- Measure the voltage between test points 1 and 2.
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Is there battery voltage?
YES
The +B SMART and SSB GND wires are OK. Go to step 3.
NO
Go to step 6.
3. Shorted wire check (SS2 (-), SS1 (+) lines):
- Disconnect the following connector.
Keyless access control unit connector B (36P)
- Check for continuity between test points 1 and 2 individually.
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Is there continuity?
YES
Repair short to ground in the wire.
NO
The SS2 (-) and SS1 (+) wires are not shorted. Go to step 4.
4. Open wire check (SS2 (-), SS1 (+) lines):
Check for continuity between test points 1 and 2 respectively.
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Is there continuity?
YES
The SS2 (-) and SS1 (+) wires are OK. Go to step 5.
NO
Repair an open or high resistance in the wire.
5. Engine start/stop switch check:
Do the engine start/stop switch test.
Is the engine start/stop switch OK?
YES
Replace the keyless access control unit.
NO
Replace the engine start/stop switch.
6. Open wire check (+B SMART line):
Measure the voltage between test points 1 and 2.
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Is there battery voltage?
YES
Repair an open or high resistance in the SSB GND wire.
NO
Repair an open or high resistance in the +B SMART wire.
READ NEXT:
DTC B12C6 Electric Steering Lock Switch C/D Monitor Circuit Failure
DTC (Power Control Unit)
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
DTC B12C7 Electric Steering Lock Motor Circuit Failure
DTC (Power Control Unit)
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
DTC B12D0, B12D1, B12D2
NOTE: Refer to the DTC code shown on the display, and then inspect the
connectors and terminals based on
the instructions in the table below.
DTC (Power Control Unit)
NOTE:
If you are troubleshoot
SEE MORE:
DTC C1841-11 (42-02): Differential Fluid Temperature Sensor Circuit
Low Voltage (AWD)
NOTE: Before you troubleshoot, review the General Troubleshooting Information
for the AWD with
intelligent control system.
1. Problem verification:
Turn the vehicle to the ON mode.
Check the parameter(s) below with the HDS.
Do the current condition(s) match the threshold?
YES
The failure is d
Forward Collision Warning (FCW) Symptom Troubleshooting - FCW
Indicator (Amber) Does Not Blink When The System Warns, FCW Warning Buzzer Does
Not Sound When The System Warns
1. FCW indicator and warning buzzer check:
Select FCW/LDW/High Beam Support/Traffic Sign Recognition System from
the DRIVING SUPPORT
menu with the HDS, and enter the FUNCTION TEST.
Select FCW drive and Indicator drive with the HDS.
FCW drive
Indicator drive
Does the FCW indicator blink?, and
