Honda Ridgeline. Manual — part 259
*90
SJC8A00E44381000000EAAT00
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15-18
Rear Differential
Circuit Diagram
A6
G1
BAT
YEL
YEL
LIGHT
INDICATOR
GAUGE CONTROL MODULE
RED
C3
(20 A)
No.4
No.21 (7.5 A)
VTM 4 CONTROL UNIT
RED/BLK
YEL
RED/WHT
VTM 4 LOCK SWITCH
4
2
1
3
5
YEL
IG1
IGNITION SWITCH
BRN/WHT
YEL/BLK
RED/WHT
A14
WARN1
A8
LOCKSW
A16
LOCKH
PWR
B7
A4
FSR
A1
IG1
RED/WHT
WARN2
B11
ORN/GRN
RED/BLU
3
2
1
5
BLK/YEL
WHT/RED
No.23 (IG) (50 A)
BATTERY
UNDER HOOD FUSE/RELAY BOX
No.22 (BAT) (120 A)
No.18 (15 A)
UNDER DASH
FUSE/RELAY BOX
IG1 HOT in ON (II) and
START (III)
VTM 4
RELAY
VTM 4
INDICATOR
TAILLIGHT
RELAY
DASH LIGHTS
BRIGHTNESS
CONTROLLER
(In the gauge
control module)
AUXILIALY
UNDER HOOD
FUSE BOX
D1
N44
A
A
*90
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15-19
GRN/ORN
GRN/ORN
G601
GRN
BRN
WHT
BLK
BLK/WHT
BLK/RED
37
12
RED
WHT
PG
B5
BLK
4
BLK
BRN/BLK
REAR DIFFERENTIAL
LCOL
B2
LCOH
B1
1
2
BLK/RED
BLK/WHT
A18
K LINE
LT BLU
SCS
A20
BRN
9
7
DATA LINK CONNECTOR
A1
A28
: Shielding
G501
26
28
7
5
VSA MODULATOR CONTROL UNIT
WHT/RED
LT GRN
GRY/RED
GRY/YEL
A5
RLP
A3
RRP
FRP
A7
FLP
A9
RED
BLU
WHT
A36
WHT
RED
TOL
A13
TOH
A15
5
2
BLK
WHT
6
3
BRN
GRN
RCOL
B4
RCOH
B3
GRN/ORN
BRN/YEL
BLK
B12
LG
A10
LG
PARBRK
A6
A11
CANH
CANL
A22
A12
NEP
RIGHT CLUTCH
ELECTROMAGNETIC
COIL
DIFFERENTIAL OIL
TEMPERATURE
SENSOR
POWERTRAIN CONTROL
MODULE (PCM)
MULTIPLEX
INTEGRATED
CONTROL
UNIT (MICU)
PARKING
BRAKE
SWITCH
VTM 4
CONTROL
UNIT
LEFT CLUTCH
ELECTROMAGNETIC
COIL
01
SJC8A00K80200081211FAAT01
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DTC 21-1, 21-2, 22-1, 22-2:
YES
NO
YES
NO
YES
NO
YES
NO
15-20
Rear Differential
DTC Troubleshooting
VTM-4 CONTROL UNIT CONNECTOR A (22P)
FLP (WHT/RED)
FRP (LT GRN)
Front Wheel
Sensors
NOTE: Before you troubleshoot, review the general
troubleshooting information (see page 15-4).
1. Turn the ignition switch ON (II).
2. Clear the DTC (see page 15-8).
3. Test-drive the vehicle, and check for DTCs with the
HDS.
Go to step 4.
Intermittent failure, the system is OK at this
time.
4. Check for DTCs in the VSA system with the HDS.
Go to the indicated DTCs troubleshooting.
Go to step 5.
5. Turn the ignition switch OFF.
6. Raise the vehicle, and make sure it is securely
supported.
7. Spin the rear wheels by hand, and check for rear
brake drag.
Repair cause of rear brake drag, and retest.
Go to step 8.
8. Turn the ignition switch ON (II).
9. Measure voltage between the No. 7 and No. 9
terminals of the VTM-4 control unit connector A
(22P) and body ground while rotating the
appropriate wheel (1 rotation/second).
DTC
Appropriate Terminal
21 (Left-front)
A9
22 (Right-front)
A7
Go to step 16.
Go to step 10.
10. Turn the ignition switch OFF.
11. Disconnect the VTM-4 control unit connector A
(22P) and the VSA modulator-control unit 46P
connector.
Wire side of female terminals
Is DT C 21-1, 21-2, and/ or 21-2 indicated?
Ar e ther e any V SA DT Cs indicated?
Ar e the r ear br akes dr agging?
Is ther e about 2 V to 3 V ?
02
03
04
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YES
NO
YES
NO
YES
NO
15-21
VTM-4 CONTROL UNIT CONNECTOR A (22P)
FLP (WHT/RED)
FRP (LT GRN)
VTM-4 CONTROL UNIT CONNECTOR A (22P)
FLP (WHT/RED)
FRP (LT GRN)
JUMPER WIRE
JUMPER WIRE
VSA MODULATOR-CONTROL UNIT 46P CONNECTOR
FRP (LT GRN)
FLP (WHT/RED)
12. Check for continuity between the terminals No. 7
and No. 9 of VTM-4 control unit connector A (22P)
and body ground.
Repair short to ground in the wire between
the VTM-4 control unit (A7 and/or A9) and the VSA
modulator-control unit.
Go to step 13.
13. Connect the terminals No. 7 and No. 9 of VTM-4
control unit connector A (22P) to body ground with
the jumper wires.
14. Disconnect the VSA modulator-control unit 46P
connector.
15. Check for continuity between the VSA modulator-
control unit 46P connector terminals and body
ground.
Appropriate
wheel
Appropriate Terminal
VSA modulator-control unit
Right-front
28
Left-front
26
Go to step 16.
Repair open in the wire between the VTM-4
control unit (A7 and/or A9) and the VSA modulator-
control unit.
16. Check for poor connections or loose terminals at
the VTM-4 control unit and the VSA modulator-
control unit connectors. If the connections are OK,
replace the VTM-4 control unit, then go to step 17.
17. Test-drive the vehicle, and check for DTCs with the
HDS.
Replace the VSA modulator-control unit
(see page 19-94).
The system is OK at this time.
Wire side of female terminals
Wire side of female terminals
Wire side of female terminals
Is ther e continuity?
Is ther e continuity?
Is DT Cs 21-1, 21-2, and/ or 22-2 indicated?
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