Isuzu 2000 Trooper Workshop Manual page 1228

manifold, leak at the throttle body, a faulty or incorrectly
installed PCV valve, leaks at the intake manifold, etc.
D Throttle body – Check for sticking throttle plate. Also
inspect the air passage for deposits or objects which
will not allow the ETC position to fully extend or
properly seat.
DTC P0507 – Idle Air Control System High RPM
Step
1 Was the "On-Board (OBD) System Check" performed?
2 Visually/physically inspect for the following conditions:
D
Throttle body tampering.
D
Restricted intake throttle system. Check for a
possible collapsed air intake duct, restricted air
filter element, or foreign objects blocking the air
intake system.
D
Throttle body: Check for objects blocking the
throttle
deposits in
throttle valve, and
throttle bore and on the throttle plate.
D
Throttle body with lever: Check for objects send
round the throttle spring lever that lever is smooth
movement, and spring lever has not excessive
play
Do any of the above require a repair?
3 Visually/physically inspect for the following conditions:
D
Acceleration pedal tampering.
D
Acceleration pedaL : Check for objects blocking
the spring or pedal arm.
D
Acceleration pedal : Check for objects move the
acceleration
movement, and acceleration pedal arm has not
excessive play.
Do any of the above require a repair?
4 1. Check for a poor connection at the throttle body
harness connector.
2. Check for a poor connection at the acceleration
position sensor harness connector.
3. If a problem is found, replace faulty terminals as
necessary.
Was a problem found?
5 Check the following circuits for an open, short to
voltage, short to ground, or poor connection at the
PCM:
D
Throttle position sensor 1 circuit.
D
Throttle position sensor 2 circuit.
D
Throttle DC motor circuit.
D
Throttle position sensor resistance.
D
Throttle DC motor resistance.
D
If a problem is found, repair as necessary.
Was a problem found?
TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Action
passage or throttle bore, excessive
the throttle passage and on the
excessive deposits in the
pedal that pedal
If DTC P0507 cannot be duplicated, reviewing the Failure
Records vehicle mileage since the diagnostic test last
failed may help determine how often the condition that
caused the DTC to be set occurs. This may assist in
diagnosing the condition.
Value(s)
—
—
is smooth
—
—
Vcc-GND
1–7km
SIG-DND
change
resistance 0.3
– 100m
6E–359
Yes No
Go to OBD
System
Go to Step 2 Check
Refer to
appropriate
section for
on-vehicle
service
Go to Step 4
Refer to
appropriate
section for
on-vehicle
service Go to Step 4
Verify repair Go to Step 7
Verify repair Go to Step 6