2009 SUBARU TRIBECA Service Workshop Manual

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Page 1057 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual VDC(diag)-65
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Step Check Yes No
1CHECK THE VDCCM&H/U INPUT VOLTAGE.
1) Turn the ignition switch to O

Page 1058 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual VDC(diag)-66
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
AG:DTC C0054 BRAKE LIGHT SWITCH OPEN LINE
DTC DETECTING CONDITION:
Defective stop ligh

Page 1059 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual VDC(diag)-67
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Step Check Yes No
1CHECK OUTPUT OF STOP LIGHT SWITCH
WITH SUBARU SELECT MONITOR.
1) S

Page 1060 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual VDC(diag)-68
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
AH:DTC C0056 G SENSOR OUTPUT SEIZURE
DTC DETECTING CONDITION:
Defective G sensor
TROUB

Page 1061 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual VDC(diag)-69
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
AJ:DTC C0056 YAW RATE & G SENSOR POWER SUPPLY VOLTAGE MAL-
FUNCTION
DTC DETECTING COND

Page 1062 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual VDC(diag)-70
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
AK:DTC C0056 G SENSOR OUTPUT MALFUNCTION
DTC DETECTING CONDITION:
Defective G sensor
T

VDC(diag)-70
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
AK:DTC C0056 G SENSOR OUTPUT MALFUNCTION
DTC DETECTING CONDITION:
Defective G sensor
TROUBLE SYMPTOM:
VDC does not operate.
Step Check Yes No
1CHECK THE YAW RATE & G SENSOR POW-
ER SUPPLY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from yaw rate &
G sensor.
3) Turn the ignition switch to ON.
4) Measure the voltage between yaw rate & G
sensor and chassis ground.
Connector & terminal
(B359) No. 5 (+) — Chassis ground (–):
Is the voltage 10 — 15 V? Go to step 2.Replace the yaw
rate & G sensor
power supply cir-
cuit.
2CHECK GROUND CIRCUIT OF YAW RATE &
G SENSOR.
1) Turn the ignition switch to OFF.
2) Measure the resistance between the yaw
rate & G sensor and chassis ground.
Connector & terminal
(B359) No. 1 (+) — Chassis ground (–):
Is the resistance less than 0.5
Ω?
Go to step 3.Replace the yaw
rate & G sensor
power supply cir-
cuit.
3CHECK YAW RATE & G SENSOR.
1) Connect all the connectors.
2) Erase the memory.
3) Perform the inspection mode.
4) Read the DTC.
Is the same DTC displayed? Replace the
VDCCM&H/U.
Go to step 4.
4CHECK OTHER DTC DETECTION.Is any other DTC displayed? Perform the diag-
nosis according to
DTC.
Te m p o r a r y p o o r
contact occurs.
Step Check Yes No
1CHECK YAW RATE & G SENSOR INSTAL-
LATION.
Check the yaw rate & G sensor installation.
Are the yaw rate & G sensor
and bracket tightened to a
torque of 7.5 N·m (0.76 kgf-m,
5.5 ft-lb)?
Go to step 2.Tighten the yaw
rate & G sensor.
2CHECK G SENSOR OUTPUT.
1) Connect the Subaru Select Monitor to the
vehicle.
2) Select {Current Data Display & Save} in
Subaru Select Monitor.
3) Drive at a constant speed of approximately
40 km/h (25 MPH) and read the G sensor out-
put at that time.
Is the indicated reading on the
monitor display –1.5 — 1.5 m/
s2?
Go to step 3.Replace the yaw
rate & G sensor.
3CHECK THE VDCCM&H/U.
1) Connect all the connectors.
2) Erase the memory.
3) Perform the inspection mode.
4) Read the DTC.
Is the same DTC displayed? Replace the
VDCCM&H/U.
Go to step 4.
4CHECK OTHER DTC DETECTION.Is any other DTC displayed? Perform the diag-
nosis according to
DTC.
Te m p o r a r y p o o r
contact occurs.

Page 1063 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual VDC(diag)-71
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
AL:DTC C0057 ECM COMMUNICATION
DTC DETECTING CONDITION:
No CAN signal from ECM.
TROUBL

VDC(diag)-71
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
AL:DTC C0057 ECM COMMUNICATION
DTC DETECTING CONDITION:
No CAN signal from ECM.
TROUBLE SYMPTOM:
VDC does not operate.
AM:DTC C0057 AT COMMUNICATION
DTC DETECTING CONDITION:
No CAN signal from TCM.
TROUBLE SYMPTOM:
•ABS does not operate.
•VDC does not operate.
Step Check Yes No
1CHECK LAN SYSTEM.
Perfor m the diagnosis for LAN system. LAN(diag)-25, OPERATION, Read Diagnostic
Tr o u b l e C o d e ( D T C ) . >
Is there any fault in LAN sys-
tem?
Pe r for m t h e d ia g -
nosis according to
DTC for LAN sys-
tem.
Go to step 2.
2CHECK POOR CONTACT OF CONNEC-
TORS.
Is there poor contact in ECM
connector?
Repair the con-
nector.
Go to step 3.
3CHECK ECM.Is ECM normal? Go to step 4.Replace the ECM.
4CHECK THE VDCCM&H/U.
1) Connect all the connectors.
2) Erase the memory.
3) Perform the inspection mode.
4) Read the DTC.
Is the same DTC displayed? Replace the
VDCCM&H/U.
VDC Control Mod-
ule & Hydraulic
Control Unit
(VDCCM&H/U).>
Go to step 5.
5CHECK OTHER DTC DETECTION.Is any other DTC displayed? Perform the diag-
nosis according to
DTC.
Te m p o r a r y p o o r
contact occurs.
Step Check Yes No
1CHECK LAN SYSTEM.
Perfor m the diagnosis for LAN system. LAN(diag)-25, OPERATION, Read Diagnostic
Tr o u b l e C o d e ( D T C ) . >
Is there any fault in LAN sys-
tem?
Pe r for m t h e d ia g -
nosis according to
DTC for LAN sys-
tem.
Go to step 2.
2CHECK POOR CONTACT OF CONNEC-
TORS.
Is there poor contact in TCM
connector?
Repair the con-
nector.
Go to step 3.
3CHECK TCM.Is the TCM normal? Go to step 4.Replace the TCM.
Tr a n s m i s s i o n C o n -
trol Module
(TCM).>
4CHECK THE VDCCM&H/U.
1) Connect all the connectors.
2) Erase the memory.
3) Perform the inspection mode.
4) Read the DTC.
Is the same DTC displayed? Replace the
VDCCM&H/U.
Go to step 5.
5CHECK OTHER DTC DETECTION.Is any other DTC displayed? Perform the diag-
nosis according to
DTC.
Te m p o r a r y p o o r
contact occurs.

Page 1064 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual VDC(diag)-72
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
AN:DTC C0057 TRANSMISSION SYSTEM MALFUNCTION
DTC DETECTING CONDITION:
Transmission Sys

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