1A-68 Engine Control System (4HK1)
5
1. Inspect the turbocharger assembly for the
following conditions:
• Physical damage of turbocharger
• Turbocharger nozzle control linkage
damaged
• Physical damage of VNT actuator &
sensor
• Loose or improper installation of VNT
actuator & sensor
2. Repair or replace as necessary.
Did you find and correct the condition?
—
Go to Step 20 Go to Step 6
6
1. Turn OFF the ignition.
2. Disconnect the VNT actuator & sensor
harness connector.
3. Connect a test lamp between the each
solenoid circuit (pins 6, 7 and 8 of E-2) and a
known good ground.
4. Turn ON the ignition, with the engine OFF.
Notice: Ignition switch must be cycled when
the test lamp is probed to other positions.
Is there circuit which did not illuminate, or
continuously illuminate the test lamp (note
that the test lamp illuminate then go out
normally)?
—
Go to Step 8 Go to Step 7
7
1. Test the solenoid circuit between the VNT
control module (pins 10, 11 and 12 of E-4) and
the actuator & sensor (pins 6, 7 and 8 of E-2)
for a short circuit each other.
2. Repair the circuit(s) as necessary.
Did you find and correct the condition?
—
Go to Step 20 Go to Step 16
8
1. Test the solenoid circuits (which ever circuit
did not illuminate, or continuously illuminate at
Step 6) between the VNT control module (pins
10, 11 and 12 of E-4) and the actuator &
sensor (pins 6, 7 and 8 of E-2) for the
following conditions:
• An open circuit
• A short to ground
• A short to battery or ignition voltage
• A short to the position sensor circuit
• High resistance
2. Repair the circuit(s) as necessary.
Did you find and correct the condition?
—
Go to Step 20 Go to Step 17
9
1. Turn OFF the ignition.
2. Connect a DMM between the position sensor
reference voltage circuit (pin 1 of E-2) and a
known good ground.
3. Turn ON the ignition, with the engine OFF.
Is the DMM voltage within the specified
value?
8.0 to 10.0
volts
Go to Step 10 Go to Step 13
Step Action Value(s) Yes No
LG4HKED-WE-0871.book 68 ページ ２００７年１１月２９日 木曜日 午後６時２９分
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