FUEL SYSTEM <4D5-step
III
> -
Troubleshooting
13-48
CHECK AT THE ENGINE-ECU TERMINALS
TERMINAL VOLTAGE CHECK CHART
Engine-ECU Connector Terminal Arrangement
Terminal
No.
Check item
Inspection conditions (engine status)
Normal condition:
1
GE actuator
Ignition switch: ON (Engine stops)
9 V or higher
2
Fuel cut solenoid valve
Other than below
0 - 1 V
Engine: Idling
→
Stop (in about 1 - 3 second)
System voltage
(for 3 - 5 seconds)
3
Timing control valve
Ignition switch: ON (Engine stops)
11 V or higher
4
Glow lamp
Ignition switch: OFF
→
ON
0 - 1 V (In few seconds)
→
System voltage
5
EGR control solenoid
valve No. 2
Engine: Idling after warming up the engine
(stable condition)
System voltage
When any one of the following conditions is
satisfied:
D
Engine speed: 3,700 r/min or higher
D
Engine speed: 450 r/min or lower
D
Vehicle speed: 176 km/h or higher
D
The accelerator pedal is fully depressed
D
The accelerator pedal is released when engine
speed is 2,700 r/min or higher and vehicle speed
is 140 km/h or higher
D
Engine coolant temperature: 112
_
C or higher
System voltage
6
Intercooler fan relay
Ignition switch: ON
Boost air temperature at
45
_
C or lower
System voltage
Boost air temperature at
60
_
C or higher
0 - 1 V
7
Condenser fan relay
Condenser fan in operation
0 - 1 V
8
Engine warning lamp
Ignition switch: OFF
→
ON
0 -1 V (In few seconds)
→
System voltage
9
EGR control solenoid
valve No 1
Ignition switch: ON
System voltage
valve No. 1
Engine: After warming up the engine, conduct
sudden racing from idling.
Very briefly rises from
voltage during idling
12
Power supply
Ignition switch: ON
System voltage
25
14
Throttle solenoid valve
Ignition switch: ON (Engine stops)
System voltage
Engine: Idling after warming up the engine.
0 - 1 V
15
GE actuator power
supply
Ignition switch: ON
System voltage
