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FI
FUEL INJECTION SYSTEM
Code No. 32 Symptom The amount of air-fuel ratio feedback compensation is maintained contin-
uously in the vicinity of the lower limit (air-fuel ratio is rich).
Used diagnostic code No. 01 (throttle position sensor)
Inspection operation item and probable cause Operation item and countermeasure Reinstatement
method
Defective O
2
sensor
(unable to output a lean signal).
Replace if defective. Reinstated by
starting the engine,
operating it at idle,
and then racing it
after it has warmed
up.
Excessive volume of fuel injected by injector.
Open circuit on the 5 V side or short circuit in
wiring harness or sub lead.
Repair or replace if there is an open or short
circuit.
Main wiring harness
Black/Blue - White
Gray/Green - Blue
The fuel pressure is too high.
Compare the fuel pressure at idle and with
throttle open.
About the same → Normal
Too high → Inspect the pressure reg-
ulator.
Inspect the pressure reg-
ulator hose for pinching or
kinking.
Inspect the fuel return
hose for pinching or kink-
ing.
Inspect the throttle posi-
tion sensor.
Other:
Malfunction in the fuel system (clogging,
etc.).
Replace if defective.
Refer to “CHECKING THE FUEL PUMP AND
PRESSURE REGULATOR OPERATION”.
Repair or replace if there is a malfunction.
Repair or replace if there is a malfunction.
Execute diagnostic code 01.
Repair or replace if there is a malfunction.
Connected state of connector
Inspect the coupler for any pins that may
have pulled out.
Check the locking condition of the coupler.
If there is a malfunction, repair it and connect it
securely.
O
2
sensor coupler
Sub wiring harness coupler
Main wiring harness ECU coupler
Sub-wire harness coupler