Subaru LEGACY 2006 Manual page 4228

asieps_tobira.book 82 ページ ２００９年１０月２６日 月曜日 午前９時１６分
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Step
1 CHECK STOP LIGHT SWITCH.
1) Turn the ignition switch to OFF.
2) Disconnect the stop light switch connector.
3) Measure the resistance of stop light switch
terminals.
2 INTERVIEWING CUSTOMERS.
Make sure that the operation was performed in
which accelerator pedal and brake pedal were
depressed simultaneously (with depressing
brake pedal with left foot).
3 CHECK THE VDCCM&H/U.
1) Connect all the connectors.
2) Erase the memory.
3) Perform the Inspection Mode.
4) Read the DTC.
4 CHECK OTHER DTC DETECTION.
AQ:DTC C0057 ECM COMMUNICATION
DTC DETECTING CONDITION:
No CAN signal from ECM.
TROUBLE SYMPTOM:
• ABS does not operate.
• VDC does not operate.
Step
1 CHECK LAN SYSTEM.
Perform the diagnosis for LAN system. <Ref. to
LAN(diag)-25, OPERATION, Read Diagnostic
Trouble Code (DTC).>
2 CHECK POOR CONTACT IN CONNECTORS. Is there poor contact in ECM
3 CHECK ECM.
4 CHECK THE VDCCM&H/U.
1) Connect all the connectors.
2) Erase the memory.
3) Perform the Inspection Mode.
4) Read the DTC.
5 CHECK OTHER DTC DETECTION.
Check
Is the resistance more than 1
MΩ when switch is OFF (when
pedal is not depressed)?
Were the acceleration pedal
and brake pedal depressed
simultaneously?
Is the same DTC displayed?
Is any other DTC displayed?
Check
Is there any fault in LAN sys-
tem?
connector?
Is ECM normal?
Is the same DTC displayed?
Is any other DTC displayed?
VDC(diag)-82
Yes No
Go to step 2. Replace the stop
light switch.
Go to step 3.
System is normal.
(DTC may be
recorded while
brake is applied
during driving.))
Replace the Go to step 4.
VDCCM&H/U.
<Ref. to VDC-7,
VDC Control Mod-
ule and Hydraulic
Control Unit
(VDCCM&H/U).>
Perform the diag- Temporary poor
nosis according to contact occurs.
DTC. <Ref. to
VDC(diag)-36, List
of Diagnostic Trou-
ble Code (DTC).>
Yes No
Go to step 2.
Perform the diag-
nosis according to
DTC for LAN sys-
tem.
Repair the con- Go to step 3.
nector.
Go to step 4. Replace the ECM.
Replace the Go to step 5.
VDCCM&H/U.
<Ref. to VDC-7,
VDC Control Mod-
ule and Hydraulic
Control Unit
(VDCCM&H/U).>
Perform the diag- It results from a
nosis according to temporary noise
DTC. interference.