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FI-20
EFI SYSTEM - Troubleshooting
CHECK DIAGNOSIS SYSTEM
Check for output of diagnostic code.
(See page FI-23)
Normal code
CHECK IGNITION TIMING
1. Connect terminals TEl and El of the
check connector.
2. Check ignition timing.
STD: 100 BTDC
@
Idle
SYMPTOM - MUFFLER EXPLOSION (AFTER FIRE)
-Rich Fuel Mixture-Misfire
Malfunction
Diagnostic code(s) (See page FI-26)
code(s)
NO
Adjust ignition timing (See page IG-20)
[wI connect terminals TE1 and E1]
OK
CHECK COLD START INJECTOR
BAD
1. Cold start injector
(See page FI-77)
2. Cold start injector time switch
(See page FI-112)
OK
CHECK INJECTORS
BAD
Injectors - Leakage
OK
CHECK SPARK PLUGS
NO
1. Spark plugs
Plug gap:
7M-GE
1.1 mm (0.043 in.)
2. Compression pressure
7M-GTE 0.8 mm (0.031 in.)
Minimum:
9.0 kg/cm
2
(128 psi, 883 kPa)
- HINT-
at 250 rpm
Check compression pressure and valve
3. Valve clearance
clearance if necessary.
Standard: IN
0.15 - 0.25 mm
(0.006 - 0.010 in.)
EX 0.20 - 0.30 mm
(0.008 - 0.012 in.)
OK
CHECK EFI ELECTRONIC CIRCUIT
BAD
1. Throttle position sensor
USING VOLT/OHMMETER
2. Injection signal circuit
(See pages FI-30, 49)
(1)
I njector wiring
(2) Resistor (7M-GTE)
(3) ECU
3. Oxygen sensor(s)
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Troubleshooting
