Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Instruction - page 34
HEATING, VENTILATION AND AIR CONDITIONING (HVAC) 1A–107
Inspection of the Mode Actuator System
D08R200035
Condition
Possible cause
Correction
Does not work at all
—
Refer to
Chart A
Control failure
—
Refer to
Chart B
1A–108 HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
Chart A: Does Not Work At All
Step
Action
Value(s)
Yes
No
1
1. Turn on the ignition switch (the engine is run).
2. Disconnect the mode actuator connector (C–42)
3. Select VENT pressing the mode actuator.
Is the battery voltage provided on a regular interval
between the harness side connector terminal
No.C42–1 (+) and No.C42–5 (-)?
—
Go to
Step 3
Go to
Step 2
2
Replace the auto air conditioner control unit.
Is the action complete?
—
Varify repair
—
3
Turn on the DEF mode switch.
Is the battery voltage provided on a regular interval
between the chassis side connector terminal
No.C42–5 (+) and No.C42–1 (-)?
—
Go to
Step 5
Go to
Step 4
4
Replace the auto air conditioner control unit.
—
Varify repair
—
5
Is there continuity between the harness side connector
terminal No.C42–1 and No.I19–4?
—
Go to
Step 7
Go to
Step 6
6
Repair an open circuit between terminal No.C42–1 and
No.I19–4.
Is the action complete?
—
Go to
Step 5
—
7
Is there continuity between the harness side connector
terminal No.C42–5 and No.I19–3?
—
Go to
Step 9
Go to
Step 8
8
Repair an open circuit between terminal No.C42–5 and
No.I19–3.
Is the action complete?
—
Verify repair
—
9
Replace the mode actuator.
—
Verify repair
—
HEATING, VENTILATION AND AIR CONDITIONING (HVAC) 1A–109
Chart B: Mode Actuator Control Failure
Step
Action
Value(s)
Yes
No
1
Turn on the ignition switch (the engine is run).
Dose the mode actuator fully stroke when the defrost
mode and the vent mode are selected?
—
Go to
Step 3
Go to
Step 2
2
Repair or replace the mode door or the link unit.
Is the action complete?
—
Go to
Step 1
—
3
Is there continuity between the harness side connector
terminal No.C42–9 and No.I20–11?
—
Go to
Step 5
Go to
Step 4
4
Repair an open circuit between terminal No.C42–9 and
No.I20–11.
Is the action complete?
—
Go to
Step 3
—
5
Is there continuity between the harness side connector
terminal No.C42–3 and No.I20–10?
—
Go to
Step 7
Go to
Step 6
6
Repair an open circuit between terminal No.C42–3 and
No.I20–10.
Is the action complete?
—
Go to
Step 5
—
7
Is there continuity between harness side connector
terminal No.C42–4 and No.I20–8?
—
Go to
Step 9
Go to
Step 8
8
Repair an open circuit between terminal No.C42–4 and
No.I20–8.
Is the action complete?
—
Go to
Step 7
—
9
Is sum of the voltage between the following harness
side connector terminal approximately 5V? Voltage
between No.I20–8 and No.I20–10 plus voltage
between No.I20–8 and No.I20–11
5V
Go to
Step 11
Go to
Step 10
10
Replace the actuator.
Is the action complete?
—
Verify repair
—
11
Dose the mode actuator work normally through manual
operation?
—
Go to
Step 13
Go to
Step 12
12
Replace the sensor.
Is the action complete?
—
Verify repair
—
13
Replace the auto air conditioner control unit.
Is the action complete?
—
Verify repair
—
1A–110 HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
Inspection of the Fan Motor System
D08R200058