Page text (OCR transcript)
EFI SYSTEM — Troubleshooting
SYMPTOM — HIGH ENGINE IDLE SPEED (NO DROP)
CHECK ACCELERATOR LINKAGE
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OK
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CHECK DIAGNOSIS SYSTEM
Check for output of diagnostic code.
(See page FI-22)
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Normal code
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CHECK ISC SYSTEM
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OK
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CHECK THROTTLE POSITION SENSOR
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OK
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CHECK FUEL PRESSURE
(See page FI-45)
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OK
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CHECK COLD START INJECTOR
(See page FI-49)
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OK
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CHECK INJECTORS (See page FI-53)
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OK
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CHECK EFI ELECTRONIC CIRCUIT
USING VOLT/OHMMETER
BAD — Linkage — stuck dash pot system
Malfunction code(s) — Diagnostic code(s) (See page FI-25)
BAD — 1. Wiring connection (Air con, Throttle position sensor — ECU)
2. ISC valve
3. Air conditioner switch
BAD — Throttle body
BAD — Fuel pressure regulator — high pressure
BAD — Cold start injector — leakage
BAD — Injectors — leakage, injection quantity
BAD — 1. Wiring connection
2. Power to ECU
(1) Fusible link
(2) EFI fuse, No. 2 main relay
3. Air flow meter
4. Water temp. sensor
5. Air temp. sensor
6. Injection signal circuit
(1) Injector wirings
(2) Resistor
(3) ECU
