Toyota 4-Runner 1985 Repair Manual page 186

EFI SYSTEM -
Troubleshooting
FI-17
SYMPTOM - HIGH ENGINE IDLE SPEED (NO DROP)
I ....
HECK ACCELERATOR LINKAGE
I
Linkage - Stuck
BAD
OK
CHECK IGNITION TIMING
Adjust ign ition timing
STD:
5° BTDC
at
idle
(T - EI Short Circuit)
BAD
OK
CHECK AIR VALVE
a
Air valve - Always open
(See page F I-58) BAD
OK
CHECK AIR CONDITIONER AND
Air valve for air conditioner - Leakage
POWER STEERING IDLE-UP CIRCUIT
BAD VSV for air conditioner - Leakage
OK
CHECK DIAGNOSIS SYSTEM
Diagnostic code(s) (See page FI-25)
Check for output of diagnostic code.
Malfunction
(See page F 1-22)
code
Normal code
I
CHECK FUEL PRESSURE
.
Fuel pressure regulator - High pressure
(See page F 1-43)
BAD
OK
CHECK COLD START INJECTOR
Start injector - Leakage
(See page FI-47) BAD
OK
1
.. I
CHECK INJECTORS (See page FI-50)
-
Injectors - Leakage, Injection quality
BAD
OK
CHECK EFI ELECTRONIC CIRCUIT
-
1 . Wiring connection
USING VOL T IOHMMETER
BAD
2. Power to ECU
(1)
Fusible link
(2) Main relay
3. Air flow meter
4. Water thermo sensor
5. Air thermo sensor
6. Injection signal
(1 ) Injector wiring
(2) Resistor
(3) ECU