TSRM/MK2 Supra/Repair Manual
Repair ManualWiring Diagrams
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FI/EFI System, page 14

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EFI System — MK2 Supra EFI System, page 14
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Page text (OCR transcript)
OK CONTINUED FROM PAGE FI-13

CHECK FUEL PRESSURE
(See page FI-45)

BAD
1. Fuel pump (See page FI-44)
2. Fuel filter
3. Fuel pressure regulator
(See page FI-62)

OK

CHECK INJECTORS
(See page FI-53)

BAD
Injection condition

OK

CHECK EFI ELECTRONIC CIRCUIT
USING VOLT/OHMMETER

BAD
1. Wiring connection
2. Power to ECU
(1) Fusible link
(2) No. 1 and No. 2 main relay
3. Air flow meter
4. Water temp. sensor
5. Injection signal circuit
(1) Injector wiring
(2) Resistor
(3) ECU

SYMPTOM — ENGINE SOMETIMES STALLS

CHECK DIAGNOSIS SYSTEM
Check for output of diagnostic code.
(See page FI-22)

Malfunction
code(s)
Diagnostic code(s)
(See page FI-25)

Normal code

CHECK AIR FLOW METER
(See page FI-58)

BAD
Air flow meter

OK

CHECK WIRING CONNECTORS AND
RELAYS
Check that there is a signal change when
the connector or relay is slightly tapped
or wiggled.

BAD
1. Connector
2. No.1 and No. 2 main relay
(See page FI-68)
3. Circuit opening relay (See page FI-69)