Toyota 4-Runner 1985 Repair Manual page 181

FI-12 EFI SYSTEM - Troubleshooting
~
OK
CONTINUED FROM PAGE FI-11
CHECK AIR VALVE
1. Air valve (See page F I-58)
1.
Disconnect air hose from air valve. NO
2. Water hoses
2.
Check that the air valve opens when cold.
3. Air hoses
Room temp.: Below 20° C (68° F)
!
OK
CHECK EFI ELECTRONIC CIRCUIT
1 . Wiring connection
USING VOL T IOHMMETER
NO
2. Power to ECU
(1) Fusible link
(2)
Fuse (EFI 15A)
(3) Main relay
3. Air flow meter
4. Water thermo sensor
5. Injection signal
(1) Injector wiring
(2)
Resistor
(3) ECU