Honda Ridgeline. Manual — part 256
03
04
How to Check for DTCs
HDS Method
Service Check Signal Circuit (SCS) Method
15-6
Rear Differential
General Troubleshooting Information (cont’d)
A
A
When the VTM-4 control unit senses an abnormality in
the input or output systems, the VTM-4 indicator in the
gauge control module will usually come on, and the
malfunction indicator lamp (MIL), the D5 indicator, and/
or the VSA indicator may also come on.
There are two methods used to check for DTCs. The
recommended method is to use the HDS with the
appropriate software plugged into the data link
connector (DLC).
The other method is to connect the service check signal
(SCS) circuit with the HDS. When the data link
connector (DLC) is connected to the HDS, the VTM-4
indicator will blink the diagnostic trouble code (DTC)
when the ignition switch is turned ON (II) and the SCS
circuit is connected to body ground.
1. With the ignition switch OFF, connect the HDS to
the data link connector (DLC) (A) (located behind
the driver’s dashboard lower cover).
2. Make sure the HDS communicates with the VTM-4
control unit. If it doesn’t go to the DLC circuit
troubleshooting (see page 11-194).
3. Turn the ignition switch ON (II), and follow the
prompts on the HDS to display the DTC(s) on the
screen. After determining the DTC(s), refer to the
DTC Troubleshooting.
NOTE: See the HDS user’s manual for specific
instruction.
4. If there are fuel and emissions DTCs, A/T DTCs, or
VSA DTCs at the same time, troubleshoot the fuel
and emissions DTCs first, then A/T DTCs second,
then VSA third, and then VTM-4 last.
5. After recording the DTCs, clear all DTCs.
6. Test-drive the vehicle for several minutes in 4WD
mode, and check for DTCs. If the DTC returns, refer
to the DTC Troubleshooting. If the DTC does not
return, there was an intermittent problem within
the circuit. Make sure all connectors and terminals
in the circuit are tight.
1. Park the vehicle on level ground. Shift to P, then
turn off the engine.
2. Release the parking brake pedal.
3. With the ignition switch OFF, connect the HDS to
the data link connector (DLC) (A) (located behind
the driver’s dashboard lower cover).
4. Short the SCS circuit to body ground with the HDS.
05
06
How to Troubleshoot Circuits at the VTM-4
Control Unit
Special Tools Required
15-7
Long blinks Short blinks
(2)
(4)
OFF
See DTC 24
A
07SAZ-001000A
B
07SAZ-001000A
C
5. Turn the ignition switch ON (II), and observe the
VTM-4 indicator.
NOTE: Codes above 10 are indicated by a series of
long and short blinks. One long blink equals 10
short blinks. Add the long and short blinks together
to determine the code. After determining the code,
refer to the DTC Troubleshooting.
6. Record all the DTC(s), then refer to the DTC
Troubleshooting to determine the meaning of each
DTC.
7. Clear the DTCs from the VTM-4 control unit
memory.
8. If the MIL, D5 indicator, or the VSA indicator all
come on at the same time, troubleshoot the cause
for the MIL first, then A/T DTCs second, then VSA
third, and then VTM-4 last.
9. Test-drive the vehicle for several minutes in 4WD
mode, and check for DTCs.
If the DTC returns, refer to the DTC Troubleshooting.
If the DTC does not return, there was an
intermittent problem within the circuit. Make sure
all connectors and terminals in the circuit are tight.
Backprobe set 07SAZ-001000A (two required)
1.
2. Inspect the circuit on the VTM-4 control unit
according to the DTC Troubleshooting using the
special tools and a digital multimeter or an analog
circuit tester.
3. Connect the backprobe adapters (A) to the stacking
patch cords (B), and connect the cords to the
multimeter or an analog circuit tester (C). Using the
wire insulator as a guide for the contoured-tip of
the backprobe adapter, gently slide the tip into the
connector from the wire side until it comes in
contact with the terminal end of the wires.
(cont’d)
Remove the right side kick panel (see page 20-60)
to gain access tothe VTM-4 control unit.
07
08
How to Clear the VTM-4 Control Unit
Memory
HDS method
Service Check Signal Circuit (SCS) Method
15-8
Rear Differential
General Troubleshooting Information (cont’d)
A
A
There are two methods used to clear DTCs from the
VTM-4 control unit memory. The recommended
method is to use the HDS with the appropriate software
plugged into the data link connector (DLC).
The other method is to connect the service check signal
(SCS) connector with the HDS, and manually clear the
memory.
1. With the ignition switch OFF, connect the HDS to
the data link connector (DLC) (A) (located behind
the driver’s dashboard lower cover).
2. Make sure the HDS communicates with the VTM-4
control unit. If it doesn’t go to the DLC circuit
troubleshooting (see page 11-194).
3. Turn the ignition switch ON (II), and follow the
prompts on the HDS screen to clear the DTC(s).
NOTE: See the HDS user’s manual for specific
instruction.
1. Park the vehicle on level ground. Shift to P, then
turn off the engine.
2. Release the parking brake pedal.
3. With the ignition switch OFF, connect the HDS to
the data link connector (DLC) (A) (located behind
the driver’s dashboard lower cover).
4. Short the SCS circuit to body ground with the HDS.
5. Turn the ignition switch ON (II).
6. The VTM-4 indicator comes on and stays on for
4 seconds. Press and hold the VTM-4 LOCK swtich
while the VTM-4 indicator is on.
7. When the VTM-4 indicator goes off, release the
VTM-4 LOCK switch.
8. The VTM-4 indicator comes on and stays on for
4 seconds. Press and hold the VTM-4 LOCK switch
while the VTM-4 indicator is on.
*02
How to End a Troubleshooting Session
(required after any troubleshooting)
15-9
IGNITION
SWITCH
PARKING BRAKE
SWITCH
PGM TESTER
CONNECT
VTM-4
INDICATOR
VTM-4 LOCK
INDICATOR
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
IG switch ON (II)
4 sec
4 sec
0.3 sec
0.3 sec
0.3 sec
VTM-4 LOCK
switch pushed
VTM-4 LOCK
switch released
VTM-4 LOCK
switch pushed
VTM-4 LOCK
switch released
9. When the VTM-4 indicator goes off, release the
VTM-4 LOCK switch. The VTM-4 indicator will blink
twice quickly to confirm that the DTCs have been
cleared from the VTM-4 control unit memory.
NOTE: If the VTM-4 indicator does not blink twice
quickly, the memory has not been cleared. Turn the
ignition switch OFF, then repeat steps 5 through 9.
10. Turn the ignition switch OFF, then disconnect the
HDS from the data link connector (DLC).
1. Turn the ignition switch OFF.
2. Clear the DTCs from the VTM-4 control unit
memory.
3. Disconnect the HDS from the data link connector
(DLC).
4. Verify that the problem has been repaired; test-
drive the vehicle for several minutes in 4WD mode.
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