Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual — part 1081
1A–46 HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
Chart “A” Condenser Fan Does Not Run
Step
Action
Yes
No
1
Are 30A fuse OK?
Go to Step 2
Replace
2
Is relay (X-11) OK?
Go to Step 3
Replace
3
Is pressure switch OK?
Go to Step 4
Switch defective
or insufficient
refrigerant.
4
Is air conditioning switch OK?
Go to Step 5
Replace
5
Is fan motor OK?
Go to Step 6
Replace
6
1. Disconnect condenser fan relay (X-11).
2. Check to see if battery voltage is present at the chassis side
relay terminal NO. X11-2
Is there a battery voltage?
Go to Step 7
Open circuit
between
Condenser Fan
fuse (30A) and
No.X11-2.
7
1. Reconnect condenser fan relay (X-11).
2. Air conditioning switch “ON”.
3. Check to see if battery voltage is present at chassis side
connector terminal No.C9-3.
Is there a battery voltage?
Go to Step 8
Open circuit
between I-24-1
and C9-3.
8
1. Air conditioning switch “OFF”.
2. Check to see if continuity between chassis side relay terminal
No.X11-5 and the chassis side connector terminal No.C9-4.
Is there a continuity?
Go to Step 9
Open circuit.
9
Check to see if continuity between chassis side connector
terminal No. C24-1 and chassis side relay terminal No.X11-1.
Is there a continuity?
Poor ground or
open circuit
between chassis
side connector
terminal
No.X11-3 (or
No.C24-2) and
body ground
(No.C16).
Open circuit.
Chart “B” Condenser Fan Does Not Stop
Step
Action
Yes
No
1
1. Air conditioning switch “OFF”.
Does condenser fan stop?
Triple pressure
switch defective.
Condenser fan
relay (X11)
defective.
HEATING, VENTILATION AND AIR CONDITIONING (HVAC) 1A–47
Air Source Select Lever Diagnosis
D08RY00549
Condition
Possible cause
Correction
FRESH mode inoperative
—
Refer to Chart A
RECIRC mode inoperative
—
Refer to Chart B
1A–48 HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
Chart “A”: FRESH Mode Inoperative
Step
Action
Value(s)
Yes
No
1
Is the fuse EB-7 normal?
—
Go to Step 2
Replace the
fuse
2
Is C-16 grounded securely?
—
Go to Step 3
Ground it
securely
3
Remove the intake actuator relay.
Is the relay normal?
—
Go to Step 4
Replace the
relay
4
Is there continuity between the intake actuator relay
harness side connector C-42 terminal 4/5 and the
ground C-16?
—
Go to Step 5
Repair an
open circuit
5
1. Set the HVAC control bezel to DEF/FOOT or DEF
position.
2. Turn the starter switch on and keep the engine
running.
Is the battery voltage applied between the intake
actuator harness side connector C-42 terminal 2 and
the ground?
Approx. 12V
Go to Step 10
Go to Step 6
6
Disconnect the HVAC control bezel.
Is the battery voltage applied between the bezel
harness side connector I-33 terminal 6 and the ground?
Approx. 12V
Go to Step 8
Go to Step 7
7
Repair an open circuit between the fuse EB-7 and the
connector I-33 terminal 6.
Is the action complete?
—
Go to Step 6
—
8
Is there continuity between the HVAC control bezel
side connector terminal 5 and 6?
—
Go to Step 9
Repair or
replace the
bezel
9
Is there continuity between the harness side connector
I-33 terminal 5 and C-42 terminal 2?
—
Go to Step 10
Repair an
open circuit
10
Disconnect the intake actuator connector C-39.
Is the battery voltage applied between the harness side
connector C-39 terminal 3 and the ground?
Approx. 12V
Go to Step 11
Repair an
open circuit
11
Is there continuity between the harness side connector
C-39 terminal 2 and C-42 terminal 1
Approx. 12V
Go to Step 12
Repair an
open circuit
12
Is there continuity between the harness side connector
C–39 terminal 4 and 5?
—
Go to Step 13
Repair an
open circuit
13
Replace the intake actuator.
Is the action complete?
—
Verify repair
—
HEATING, VENTILATION AND AIR CONDITIONING (HVAC) 1A–49
Chart “B”: RECIRC Mode Inoperative
Step
Action
Value(s)
Yes
No
1
Is the fuse EB-7 normal?
—
Go to Step 2
Replace the
fuse
2
Is C-16 grounded securely?
—
Go to Step 3
Ground it
securely
3
Is the Intake actuator relay normal?
—
Go to Step 4
Replace the
relay
4
1. Disconnect the Intake actuator connector C-39
2. Connect the battery positive terminal to the Intake
actuator side connector terminal No.3 and the
battery negative terminal to terminal No.6.
3. Connect the switch side connector terminal No.4
and No.5.
Does the actuator work normally?
—
Go to Step 5
Replace the
actuator
5
Turn the Starter switch on.
Is the battery voltage applied to the harness side
connector C-39 terminal 3?
Approx.12V
Go to Step 6
Repair an
open circuit
6
Is there continuity between harness side connector
C–42 terminal No.5 and the ground?
—
Go to Step 7
Repair an
open circuit
7
1. Remove the HVAC control bezel.
2. Move the air source select lever to REC position.
Is there continuity between the control bezel side
terminal No.3 and 8?
—
Go to Step 8
Repair or
replace the
control bezel
8
Is there continuity between harness side connector
C-39 terminal 6 and connector I-33 terminal 3?
—
Go to Step 9
Repair an
open circuit
9
Repair an open circuit between connector I-33 terminal
8 and connector C-42 terminal 3.
Is the action complete?
—
Verify repair
—
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