Honda HR-V: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode C - NO DTCS And
Output Won't Shut OFF
Do this diagnosis if a component that is controlled by the B-CAN system does
not stop or turn off.
NOTE :
- If the component does not turn on, go to B-CAN System Diagnosis Test
Mode D - Refer to: Body
Electrical Troubleshooting - B-CAN System Diagnosis Test Mode D - No DTCs
and Output Won't
Turn ON,
- See the B-CAN system unit input/output index for a list of input and
output devices and the control units
that monitor the input and control the output devices.
1. Check for DTCs by selecting the system MODE MENU from the HDS.
- If any DTCs are indicated, go to B-CAN System Diagnosis Test Mode A -
Refer to: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode
A - Initial Communication and DTC
Checks,
- If any DTCs are not indicated, go to step 2.
2. Turn off the switch that controls the malfunctioning component
3. Select the applicable system from the system MODE MENU, then select DATA
LIST, and check the input of
the switch that controls the related component.
- If HDS indicates the switch is OFF, go to step 4.
- If HDS indicates the switch is not OFF, go to step 6.
4. In the DATA LIST, check the output signal of the malfunctioning component.
- If the output signal is OFF, go to step 5.
- If the output signal is not OFF, replace the control unit that controls
the device that will not turn OFF.
5. Check the relay that does not stop or turn off, if applicable, then check
for a short in the wire between the
relay and the component, the relay and control unit, or the component and
control unit.
- If the relay and the wire harness are OK, replace the control unit that
controls the component that will
not stop or turn OFF.
- If the relay and the wire harness are not OK, replace the relay or
repair/replace the wire harness.
6. Check the switch, then check for a short in the wire between the switch
and the control unit that monitors the
switch.
- If the switch and the wire harness are OK, replace the control unit that
monitors the switch.
- If the switch and the wire harness are not OK, replace the switch or
repair/replace the appropriate wire
harness.
BODY ELECTRICAL TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE D - NO
DTCS AND OUTPUT WON'T TURN ON
Do this diagnosis if a component that is controlled by the B-CAN system does
not run or come on.
NOTE :
- If the component does not turn off or stop, go to B-CAN System Diagnosis
Test Mode C - Refer to: Body
Electrical Troubleshooting - B-CAN System Diagnosis Test Mode C - No DTCs
and Output Won't
Shut OFF or.
- See the B-CAN system unit input/output index for a list of input and
output devices and the control units
that monitor the input and control the output devices.
1. Check the fuse of the malfunctioning output device.
- If the fuse is OK, go to step 2.
- If the fuse is not OK, replace the fuse. If the fuse blows again, repair
the short to ground on the fuse
circuit of the malfunctioning device.
2. Check for DTCs by selecting the system MODE MENU from the HDS.
- If any DTCs are indicated, go to B-CAN System Diagnosis Test Mode A -
Refer to: Body Electrical
Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication
and DTC Check,
- If any DTCs are not indicated, go to step 3.
3. Turn ON the switch that controls the malfunctioning component
4. Select the applicable system from the system MODE MENU, then select DATA
LIST, and check the input of
the switch that controls the related component.
- If there is an output signal, go to step 5.
- If there is not an output signal, go to step 9.
5. Check the relay (if applicable) and ground, then check for an open or a
short in the circuit for the
malfunctioning component.
- If the relay and the wire harness are OK, go to step 6.
- If the relay and the wire harness are not OK, replace the relay or
repair the wire circuit.
6. Do the function test for the malfunctioning component.
- If the output device pass the function test, go to step 7.
- If the output device does not pass the function test, replace the
component.
7. With the malfunctioning output device connected, connect a voltmeter
between the malfunctioning output
device and body ground on the wire that the control unit uses to control the
output device circuit
8. Select FUNCTIONAL TESTS from the system MODE MENU, and do the forced
operation test of the
malfunctioning component.
- If the voltage changes (12 V to 0 V, or 0 V to 12 V), inspect the ground
for the component. If OK,
replace the component.
- If the voltage does not change, replace the control unit that controls
the malfunctioning component.
9. Select DATA LIST from the system MODE MENU, and make sure the switch
signal input for the
malfunctioning system indicates a change when operated.
- If the switch input indicates ON when the switch is ON, replace the
control unit that controls the
malfunctioning component.
- If the switch input does not indicate ON when the switch is ON, go to
step 10.
10.Check the switch and its ground (if applicable), then check for an open or
a short in the wire between the
switch and the control unit that monitors it.
- If the switch and the wire harness are OK, replace the control unit that
monitors the switch.
- If the switch and the wire harness are not OK, replace the switch, or
repair/replace the wire harness.
CIRCUIT DIAGRAM
COMMUNICATION SYSTEMS CIRCUIT DIAGRAM
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READ NEXT:
NOTE : If you suspect the HDS or the HDS DLC cable may be the source of the
communication problem,
verify that they are working properly by connecting them to a known-good,
similar vehicle and syste
1. F-CAN circuit resistance check:
Turn the vehicle to the OFF (LOCK) mode.
Jump the SCS line with the HDS.
SCS Short
Disconnect the following connector.
PCM connector A (51P)
Measure the res
SEE MORE:
LANEWATCH SYSTEM DESCRIPTION - OVERVIEW (NA)
LaneWatch System Description - Overview
LaneWatch uses a camera and the multi-information display to help drivers
recognize objects in the passenger's
side blind spot. The added visibility improves safety when changing lanes or
making right turns.
The
1. PCU DTC check.
Turn the vehicle to the ON mode.
Connect the HDS to the data link connector (DLC).
Check for DTCs in the POWER CONTROL UNIT with the HDS.
DTC (POWER CONTROL UNIT)
Are there any DTCs?
YES
Go to indicated DTC troubleshooting.
NO
Go to step 2.
2. Shorted wire check (KEY SW line)