Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Service manual — part 564
1A–124 HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
Inspection of the Fan Motor System
D08R200270
HEATING, VENTILATION AND AIR CONDITIONING (HVAC) 1A–125
Condition
Possible cause
Correction
The fan dose not rotate at all
—
Refer to Chart A
The fan dose not stop
—
Refer to Chart B
Chart A: Fan Does Not Rotate At All
Step
Action
Value(s)
Yes
No
1
Are the fuse No.C–19 normal?
—
Go to Step 2
Replace the
fuse
2
Are the relay No.B–36 normal?
—
Go to Step 3
Replace the
relay
3
Turn on the ignition switch (the engine is run).
Is the battery voltage applied between the harness side
connector terminal No.B5–1 and ground?
—
Go to Step 5
Go to Step 4
4
Repair an open circuit between terminal No.B5–1 and
No.C–19 fuse.
Is the action complete?
—
Go to Step 3
—
5
Is there continuity between the harness side connector
terminal No.B5–2 and ground (No.B–2)?
—
Go to Step 7
Go to Step 6
6
Repair an open circuit between terminal No.B5–2 and
ground.
Is the action complete?
—
—
—
7
Is the battery voltage applied between the harness side
connector terminal No.B5–2 and No.B5–1?
—
Go to Step 8
Go to Step 9
8
Replace the blower motor.
Is the action complete?
—
Verify repair
—
9
Refer to chart B and C.
Is the action complete?
—
Verify repair
—
Chart B: Fan Does Not Stop
Step
Action
Value(s)
Yes
No
1
1. Disconnect the power transistor connector I–50 and
the auto A/C control unit connector I–33.
2. Turn on the ignition switch.
Does the blower motor stop?
—
Go to Step 3
Go to Step 2
2
Repair a short circuit between connector, No.B5–2 and
No.I50–1, or No.B5–2 and I33–17.
Is the action complete?
—
Verify repair
—
3
Is the power transistor normal? (Refer to the later
section on “individual inspection”.)
—
Go to Step 4
Replace the
power
transistor
4
Reinstall the power transistor.
Does the blower motor start operating?
—
Replace the
auto A/C
control unit
—
1A–126 HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
Inspection of the Magnetic Clutch System
6VE1 Engine
D08R200272
HEATING, VENTILATION AND AIR CONDITIONING (HVAC) 1A–127
Condition
Possible cause
Correction
Magnetic clutch does not work
—
Refer to Chart A
Chart A: Magnetic Clutch Does Not work
Step
Action
Value(s)
Yes
No
1
Is the fuse No.C–20 normal?
—
Go to Step 2
Replace the
fuse
2
Is the relay No.X–7 (compressor relay) No.X–5 (A/C
thermo relay) and No.B–36 (heater relay) normal?
—
Go to Step 3
Replace the
relay
3
Is the pressure switch normal?
—
Go to Step 4
Replace the
pressure
switch
4
1. Turn the ignition switch on. (the engine is run.)
2. Turn the fun switch and the air conditioner switch
on.
Is the battery voltage applied between the harness side
connector terminal No.E3–1 and the ground?
—
Go to Step 5
Go to Step 6
5
Repair or replace the magnetic clutch.
Is the action complete?
—
Verify repair
—
6
Is there continuity between the harness side connector
terminal No.X7–4 and No.E3–1?
—
Go to Step 8
Go to Step 7
7
Repair an open circuit between terminal No.X7–4 and
No.E3–1.
Is the action complete?
—
Go to Step 6
—
8
Is the battery voltage applied between the harness side
connector terminal No.X7–2 and ground, No.X7–1 and
ground?
—
Go to Step 10
Go to Step 9
9
Repair an open circuit between terminal No.X7–2 and
fuse No.C–20, No.X7–1 and fuse No.C–20.
Is the action complete?
—
Go to Step 8
—
10
Is the battery voltage applied between the harness side
connector terminal No.I33–18 and ground?
—
Go to Step 12
Go to Step 11
11
Repair an open circuit between terminal No.I33–18 and
No.X7–3.
Is the action complete?
—
Go to Step 10
—
12
Is the battery voltage applied between the harness side
connector terminal No.C89–2 and ground?
—
Go to Step 14
Go to Step 13
13
Repair an open circuit between terminal No.C89–2 and
fuse No.C–20.
Is the action complete?
—
Go to Step 12
—
14
Is the battery voltage applied between the harness side
connector terminal No.X5–3 and ground, No.X5–2 and
ground?
—
Go to Step 16
Go to Step 15
15
Repair an open circuit between terminal No.X5–3 and
No.C89–1, No.X5–2 and fuse No.C–20.
Is the action complete?
—
Go to Step 14
—
16
Is the battery voltage applied between the harness side
connector terminal No.I32–14 and ground?
—
Go to Step 18
Go to Step 17
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