SERVICING INFORMATION 9-3
MALFUNCTION
CODE
DETECTED ITEM
DETECTED FAILURE CONDITION
CHECK FOR
C28
Secondary throttle
valve actuator
When no actuator control signal is supplied from the ECM or
communication signal does not reach ECM or operation voltage
does not reach STVA motor, C28 is indicated. STVA can not
operate.
STVA lead wire/coupler.
C29
Secondary throttle
position sensor
The sensor should produce following voltage.
0.1 V sensor voltage 4.8 V
Without the above range for 4 sec. and more, C29 is indicated.
Secondary throttle position sensor, lead wire/coupler connec-
tion.
C31
Gear position signal
It judges from gear position voltage, engine speed and throttle
position by ECM, when the gear position voltage is 0.2 V and
less.
Gear position sensor, wiring/coupler connection. Gearshift cam
etc.
C32/C33
Fuel injector #1/#2 When fuel injector voltage gets 1.3 V and less, C32 or C33 is
indicated.
Injector, wiring/coupler connection, power supply to the injector.
C41
Fuel pump relay No voltage is applied to the both injectors #1/#2 for 3 sec. after
the contact of fuel pump relay is turned ON. Or voltage is
applied to the both injectors #1/#2, when the contact of fuel
pump is OFF.
Fuel pump relay, connecting lead wire, power source to fuel
pump relay, fuel injectors.
C42
Ignition switch Ignition switch signal is not input in ECM.
Ignition switch, lead wire/coupler.
C44
Heated oxygen sensor
(HO2S)
[E-02, 19]
The sensor voltage should be the following and less after warm-
ing up condition.
(Sensor voltage 0.4 V)
Without the above value, C44 is indicated.
Heater operation voltage does not reach in the oxygen heater
circuit, C44 in indicated.
The Heater can not operate.
HO2S lead wire/coupler connection.
Battery voltage supply to the HO2S.
C49
PAIR control solenoid
valve
PAIR control solenoid valve voltage is not input in ECM.
PAIR control solenoid valve, lead wire/coupler.
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