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SYMPTOM
Reference
page
HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA
Camshaft position sensor circuit
1
12
2
2
2
2
2
EC-946
Mass air flow sensor circuit
3
EC-739
Heated oxygen sensor 1 (front) circuit EC-778
Engine coolant temperature sensor circuit 1 2 3 3 3
2
3 EC-755, 773
Throttle position sensor circuit 1 2 2 2 2 EC-760
Incorrect throttle position sensor adjustment 3 1 1 1 1 1 1 1 EC-694
Vehicle speed sensor circuit 2
33 3
EC-1023
Knock sensor circuit
3
EC-936
ECM
22 33 2 21
EC-1045,
709
Start signal circuit 1 EC-1174
Park/neutral position (PNP) switch circuit 3 3
32
3 EC-1153
Power steering oil pressure switch circuit 2 EC-1185
1 - 6: The numbers refer to the order of inspection.
(continued on next page)
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
VG33E
Symptom Matrix Chart (Cont’d)
EC-711
FE
CL
MT
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
GI
MA
EM
LC
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