Isuzu Trooper (2000 year). Manual — part 36
HEATING, VENTILATION AND AIR CONDITIONING (HVAC) 1A–113
Chart 2: Ambient Sensor
D08RY00140
Step
Action
Value(s)
Yes
No
1
Disconnect ambient sensor connector. (No.C–86)
Is performance of the ambient sensor normal? (Refer
to the later section on “Individual inspection”)
—
Go to Step 2
Replace the
ambient
sensor
2
Connect the ambient sensor connector.
Is resistance between the harness side connector
No.I33–2 and No.I33–11 normal?
Refer to the
later section
on “Individual
inspection”
Go to Step 4
Go to Step 3
3
Repair an open circuit between terminal No.I33–2 and
No.C86–1 or No.I33–11 and No.C86–2.
Is the action complete?
—
Verify repair
—
4
Replace the auto air conditioner control unit.
Is the action complete?
—
Verify repair
—
1A–114 HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
Chart 3: Sun Sensor
D08RY00139
Step
Action
Value(s)
Yes
No
1
Disconnect the sun sensor connector. (No.I–35)
Is performance of the sun sensor normal? (Refer to the
later section on individual inspection)
—
Go to Step 2
Replace the
sun sensor.
2
Is there continuity between the harness side connector
terminal No.I33–3 and No.I35–2?
—
Go to Step 4
Go to Step 4
3
Repair an open circuit between terminal No.I33–3 and
No.I35–2.
Is the action complete?
—
Go to Step 2
—
4
Is there continuity between the harness side connector
terminal No.I33–11 and No.I35–1?
—
Go to Step 6
Go to Step 5
5
Repair an open circuit between terminal No.I33–11 and
I35–1.
Is the action complete?
—
Go to Step 4
—
6
Replace the auto air conditioner control unit.
Is the action complete?
—
Verify repair
—
HEATING, VENTILATION AND AIR CONDITIONING (HVAC) 1A–115
Inspection of the Intake Actuator System
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1A–116 HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
Condition
Possible cause
Correction
Does not work at all
—
Refer to Chart A
Control failure
—
Refer to Chart B
Chart A: Does Not Work At All
Step
Action
Value(s)
Yes
No
1
Is the fuse FL–1 normal?
—
Go to Step 2
Replace the
fuse
2
Is the fuse C–20 normal?
—
Go to Step 3
Replace the
fuse
3
Is the relay B–36 normal?
—
Go to Step 4
Replace the
relay
4
Turn on the ignition switch. (the engine is run.)
Is the battery voltage applied between the harness side
connector terminal No.I49–3 and ground?
Approx 12V
Go to Step 6
Go to Step 5
5
Repair an open circuit between terminal No.I49–3 and
No.B36–4.
Is the action complete?
—
Go to Step 4
—
6
Is the battery voltage applied between the harness side
connector terminal No.I49–4 and ground?
Approx 12V
Go to Step 8
Go to Step 7
7
Replace the intake actuator motor.
Is the action complete?
—
Go to Step 6
—
8
Is there continuity between the harness side connector
terminal No.I32–11 and No.B49–4?
—
Go to Step 10
Go to Step 9
9
Repair an open circuit between No.I32–11 and I49–4.
Is the action complete?
—
Verify repair
—
10
Replace the auto air conditioner control unit.
Is the action complete?
—
Verify repair
—
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