Subaru LEGACY 2006 Manual page 4205

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AA:DTC C0042 POWER VOLTAGE MALFUNCTION
DTC DETECTING CONDITION:
CHECK THE VDCCM&H/U power supply voltage.
TROUBLE SYMPTOM:
• ABS does not operate.
• EBD may not operate.
• VDC does not operate.
NOTE:
Warning lights go off if voltage returns.
WIRING DIAGRAM:
B310
1 2 3 4 5 6 7 8
11 12 13 14 15 16 17 18 19 20 21 22
27 28 29 30 31 32 33 34 35 36 37 38
IGNITION
SWITCH
B310 VDCCM & H/U
9 10
23 24 25 26
39 40 41 42
VDC(diag)-59
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
BATTERY
GENERATOR
E
E
VDC00405