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Symptom Troubleshooting Index
These symptoms DO NOT trigger Diagnostic Trouble Codes (DTCs) or cause the Malfunction Indicator Lamp (MlL) to
come on. lf the MIL is reported on, check for DTCS. lf the vehicle has one of these symptoms, do the diagnostic
procedure for it, in the sequence listed, until you find the cause.
Symptom
Diagnostic procedure
Also check for
E n g i n e w i l l n o t s t a n
(MlL works OK, no DTCS set)
1. Testthe battery (see page 22-39)
2. Testthe starter {see page 4-7)
3 . T e s t t h e f u e l p u m p ( s e e p a g e l l - 1 0 7 )
4. Troubleshoot the PGM-Fl main relay circuit (see page 11
1021
compression
lntake air leaks
Locked up
e n g i n e
Broken timing
c h a i n
Contaminated
fuel
Engine will not sta rt
(MlL comes on and stays on,
or never comes on at all, no
DTCS set)
T r o u b l e s h o o t t h e M I L c i r c u i t ( s e e p a g e 1 1 ' 8 1 )
Engine will not sta rt
{immobilizer indicator comes
o n )
Troubleshoot the immobilizer system (see page 22-120)
Hard starting
(MlL works OK, no DTCS set)
1. Testthe battery (see page 22-39)
2 . C h e c k t h e f u e l p r e s s u r e ( s e e p a g e l l - 1 0 5 )
Low
compressaon
lntake air leaks
Contaminated
fuel
Cold fast idle too low
(MlL works OK, no DTCS set)
1 . D o t h e i d l e l e a r n p r o c e d u r e ( s e e p a g e ' 1 1 - 1 0 0 ) .
2 . C h e c k t h e i d l e s o e e d ( s e e o a o e 1 1 - 1 0 0 )
Cold fast idle too high
(MlL works OK, no DTCS set)
1 . D o t h e i d l e l e a r n p r o c e d u r e ( s e e p a g e 1 1 - 1 0 0 ) .
2 . C h e c k t h e i d l e s p e e d ( s e e p a g e 1 1 - 1 0 0 )
3 . I n s p e c v a d j u s t t h e t h r o t t l e c a b l e
( s e e p a g e ' 1 1 - 1 2 4 )
4. InsDect and test the throttle bodv (see Daoe 11-122)
ldle speed fluctuates
(MlL works OK, no DTCS set)
1 . D o t h e i d l e l e a r n p r o c e d u r e { s e e p a g e 1 1 - 1 0 0 ) .
2 . C h e c k t h e i d l e s p e e d { s e e p a g e 1 1 - 1 0 0 )
3, lnspecvadjust the throttle cable (see page 1'l-'1241
4. Insoect and testthe throttle bodv {see oaoe 11-122)
lntake air leaks
Low power
(MlL works OK, no DTCS set)
1. Check the fuel pressure (see page 1 1-105)
2. lnspect and test the throttle body (see page 11-1221
3. InsDecvadiust the throttle cable {see oaoe 11-124)
Low
compression
E n g i n e s t a l l s
(MlL works OK, no DTCS set)
1 . D o t h e i d l e l e a r n p r o c e d u r e ( s e e p a g e ' 1 1 - 1 0 0 ) .
2 . C h e c k t h e f u e l p r e s s u r e ( s e e p a g e l l - 1 0 5 )
3 . C h e c k t h e i d l e s p e e d ( s e e p a g e 1 1 - 1 0 0 )
4. Troubleshootthe brake pedal position switch signal
c i r c u i t ( s e e p a q e 1 1 - 9 9 )
I n t a k e a i r l e a k s
Faulty harness
and sensor
connefirons
Difficult to refuel
(MlL works OK, no DTCS set)
1 . T e s t t h e f u e l t a n k v a p o r c o n t r o l v a l v e ( s e e p a g e l l - 1 4 6 )
2. Inspect the fuel tank signal tube between the fuel pipe and
the fuel tank vaoor control valve
3. Inspect the fuel tank venl tube between the EVAP canister
and the fuel tank vapor control valve
4. Check the EVAP canister
Fuel overflows during
refueling
{No DTCS set)
Replace the fuel tank vapor control valve (see page 1 1-147)
1 1 - 9
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Table of Contents
Troubleshooting
