FUEL SYSTEM <4D5-step
III
> -
Troubleshooting
13-50
Terminal
No.
Normal condition:
Inspection conditions (engine status)
Check item
87
Fuel temperature sen-
sor
Ignition switch: ON
Fuel temperature: 0
_
C
3.2 - 3.6 V
sor
Fuel temperature: 20
_
C
2.3 - 2.7 V
Fuel temperature: 40
_
C
1.5 - 1.9 V
Fuel temperature: 80
_
C
0.4 - 0.8 V
88
Boost air temperature
sensor
Ignition switch: ON
Intake air temperature:
0
_
C
3.2 - 3.8 V
Intake air temperature:
20
_
C
2.3 - 2.9 V
Intake air temperature:
40
_
C
1.4 - 2.0 V
Intake air temperature:
80
_
C
0.4 - 1.0 V
89
Crank angle sensor
Engine: Idling (Use a digital voltage meter to check.)
0 V
↔
5 V
(repeat the change)
90
EGR valve position
sensor
Engine: After warm-
ing up the engine
Idling under no load
2.3 - 3.3 V
sensor
ing up the engine
Engine is suddenly raced
Momentarily drops from
voltage during idling
91
Parking switch
Ignition switch: ON
(Engine stops)
Parking brake: ON
0 - 1 V
(Engine stops)
Parking brake: OFF
System voltage
CHECK CHART FOR RESISTANCE AND CONTINUITY
BETWEEN TERMINALS
1. Turn the ignition switch to LOCK (OFF) position.
2. Disconnect the engine-ECU connector.
3. Measure the resistance and check for continuity between
the terminals of the engine-ECU harness-side connector
while referring to the check chart.
NOTE
(1) When measuring resistance and checking continuity,
a harness for checking contact pin pressure should
be used instead of inserting a test probe.
(2) Checking need not be carried out in the order given
in the chart.
Caution
If the terminals that should be checked are mistaken,
or if connector terminals are not correctly shorted
to earth, damage may be caused to the vehicle wiring,
sensors, engine-ECU and/or ohmmeter.
Be careful to prevent this!
4. If the ohmmeter shows any deviation from the standard
value, check the corresponding sensor, actuator and
related electrical wiring, and then repair or replace.
