4-8
Troubleshooting the power unit
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A
27 Water in fuel Water in fuel W/F Alert buzzer goes out when engine
started
—
1. Check for water in fuel filter. —
2. Measure the water detection
switch input voltage.
5-23
A-3
3. Check the water detection
switch for continuity.
5-23
4. Check for wiring continuity
between the water detection
switch and engine ECM.
5-23
A-3
28 Shift position
switch malfunc-
tion
Irregular signal C/E
——
1. Check the gear shift opera-
tion.
10-13
2. Measure the neutral switch
input voltage.
5-37
A-5
3. Check the neutral switch for
continuity.
5-37
4. Check for wiring continuity
between the neutral switch
and engine ECM.
5-37
A-5
29 Intake press sen-
sor malfunction
Out of specifica-
tion
C/E Higher idle speed
Degraded acceleration performance
Declining maximum engine speed
—
1. Measure the air pressure
sensor input voltage.
5-32
A-5
2. Measure the air pressure
sensor output voltage.
5-32
A-5
3. Check for wiring continuity
between the air pressure
sensor and engine ECM.
5-32
A-5
37 Intake air pas-
sage malfunction
Air leak C/E Higher idle speed
Over-revolution at fully opened throt-
tle
—
1. Check the O-rings and gas-
kets of the intake silencer
and intake manifold.
6-16
6-27
2. Check the intake manifold for
cracks.
6-27
3. Check the vacuum hose. 6-32
4. Synchronize the throttle
valves.
6-23
Trouble
code
Item Condition
Lan gauge
display
Symptom Remarks Checking steps
Refer to
page
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