MPI <4G63>
ï
Troubleshooting
13D-73
Terminal
No.
Normal condition
Check condition (Engine condition)
Check item
20
A/C relay
D
Engine: Idle speed
D
A/C switch: OFF
o
ON (A/C compressor
is operating)
System voltage or momentarily 6 V
or more
o
1 V or less
21
Fuel pump relay
Ignition switch: “ON”
System voltage
Engine: Idle speed
1 V or less
22
Engine
warning
lamp
Ignition switch: “LOCK” (OFF)
o
”ON”
1 V or less
o
System voltage (After
several seconds have elapsed)
26
Oxygen
sensor
(rear) heater
Engine: Idling after warming up
1 V or less
(rear) heater
Engine: Racing
System voltage
34
Purge control sole-
noid valve
Ignition switch: “ON”
System voltage
noid valve
Running at 3,500 r/min while engine is
warming up after having been started
1 V or less
41
Power supply
Ignition switch: “ON”
System voltage
41
Power supply
Ignition switch: “ON”
System voltage
47
43
Tachometer signal
Engine r/min: 3,000 r/min
0.3
ï
3.0 V
44
Engine
coolant
temperature
sen-
sor
Ignition switch: “ON”
When engine coolant
temperature is
ï
20
_
C
3.9
ï
4.5 V
sor
When engine coolant
temperature is 0
_
C
3.2
ï
3.8 V
When engine coolant
temperature is 20
_
C
2.3
ï
2.9 V
When engine coolant
temperature is 40
_
C
1.3
ï
1.9 V
When engine coolant
temperature is 60
_
C
0.7
ï
1.3 V
When engine coolant
temperature is 80
_
C
0.3
ï
0.9 V
45
Crank angle sen-
sor
Engine: Cranking
0.4
ï
4.0 V
sor
Engine: Idle speed
1.5
ï
2.5 V
46
Sensor impressed
voltage
Ignition switch: “ON”
4.9
ï
5.1 V
49
Engine
control
relay
Ignition switch: “LOCK” (OFF)
System voltage
relay
(power supply)
Ignition switch: “ON”
1 V or less
52
Power
steering
fluid
pressure
switch
Engine: Idling after
warmed up
When steering wheel
is stationary
System voltage
switch
When steering wheel
is turned
1 V or less
