Isuzu Trooper (2000 year). Manual - part 37

 

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Isuzu Trooper (2000 year). Manual - part 37

 

 

HEATING, VENTILATION AND AIR CONDITIONING (HVAC) 1A–117

Chart B: Failure on the Intake Control 

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.B–36 normal?

—

Go to Step 3

Replace the

relay

3

Turn on the ignition switch. (the engine is run.)

Is the intake actuator stopped?

—

Go to Step 5

Go to Step 4

4

Replace or repair the auto air conditioner control unit.

Is the action complete?

—

Verify repair

—

5

Is there continuity between the harness side connector
terminal No.I49–5 and No.I33–11?

—

Go to Step 7

Go to Step 6

6

Repair an open circuit between terminal No.I49–5 and
No.I33–11.

Is the action complete?

—

Go to Step 5

—

7

Is there continuity between the harness side connector
terminal No.I49–6 and No.I33–12?

—

Go to Step 9

Go to Step 8

8

Repair an open circuit between terminal No.I49–6 and
No.I33–12.

Is the action complete?

—

Go to Step 7

—

9

Is there continuity between the harness side connector
terminal No.I49–1 and No.I33–13?

—

Go to Step 11

Go to Step 10

10

Repair an open circuit between terminal No.I49–1 and
I33-13.

Is the action complete?

—

Go to Step 9

—

11

Is there continuity between the harness side connector
terminal No.I49–2 and No.I33–14?

—

Go to Step 13

Go to Step 12

12

Repair an open circuit between harness No.I49–2 and
No.I33–14.

Is the action complete?

—

Go to Step 11

—

13

1. Disconnect the intake actuator connector No.I49.
2. Is the battery voltage applied between harness side

connector terminal
No.I49–6 and ground?
No.I49–2 and ground?
No.I49–1 and ground?

—

Go to Step 14

Go to Step 15

14

Replace or repair the intake actuator.

Is the action complete?

—

Verify repair

—

15

Replace or repair the air conditioner control unit.

Is the action complete?

—

Verify repair

—

1A–118 HEATING, VENTILATION AND AIR CONDITIONING (HVAC)

Inspection of the Mix Actuator System

D08RY00145

Condition

Possible cause

Correction

Does not work at all

—

Refer to Chart A

Control failure

—

Refer to Chart B

HEATING, VENTILATION AND AIR CONDITIONING (HVAC) 1A–119

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 mix actuator connector (I–45).
3. Short-circuit the chassis harness side connector

terminal No.I45–3 and No.I45–7.

4. Using the temperature control lever, select FH for

the temperature.

Is the battery voltage applied on a regular interval basis
between the harness side connector terminal No.I45–6
(-) and No.I45–8 (+)?

—

Go to Step 3

Go to Step 2

2

Replace the auto air conditioner control unit.

—

Varify repair

—

3

Using the temperature control lever, select FC for the
temperature.

Is the battery voltage applied on a regular interval basis
between the harness side connector terminal No.I45–6
(+) and No.I45–8 (-)?

—

Go to Step 5

Go to Step 4

4

Replace the auto air conditioner control unit.

—

Verify repair

—

5

Is there continuity between the harness side connector
terminal No.I32–6 and No.I45–6?

—

Go to Step 7

Go to Step 6

6

Repair an open circuit between terminal No.I32–6 and
No.I45–6.

Is the action complete?

—

Go to Step 5

—

7

Is there continuity between the harness side connector
terminal No.I32–5 and No.I45–8?

—

Go to Step 9

Go to Step 8

8

Repair an open circuit between terminal No.I32–5 and
No.I45–8.

Is the action complete?

—

Verify repair

—

9

Replace the mix actuator.

Is the action complete?

—

Verify repair

—

1A–120 HEATING, VENTILATION AND AIR CONDITIONING (HVAC)

Chart B: Mix Actuator Control Failure 

Step

Action

Value(s)

Yes

No

1

Turn the ignition switch (the engine is run).

 Dose the mix actuator fully stroke when FH and FC of
the temperature control lever?

—

Go to Step 3

Go to Step 2

2

Repair or replace the air mix door or the link unit.

Is the action complete?

—

Varify repair

—

3

Is there continuity between the harness side connector
terminal No.I45–3 and No.I33–11?

—

Go to Step 5

Go to Step 4

4

Repair an open circuit between terminal No.I45–3 and
No.I33–11.

Is the action complete?

—

Go to Step 3

—

5

Is there continuity between harness side connector
terminal No.I45–7 and No.I33–5?

—

Go to Step 7

Go to Step 6

6

Repair an open circuit between terminal No.I45–7 and
No.I33–5.

Is the action complete?

—

Go to Step 5

—

7

Is there continuity between the harness side connector
terminal No.I45–2 and No.I33–15?

—

Go to Step 9

Go to Step 8

8

Repair an open circuit between terminal No.I45–2 and
No.I33–15.

Is the action complete?

—

Go to Step 7

—

9

Is sum of the voltage between the following chassis
harness side connector terminals approximately 5V?
No.I33–15 and No.I33–5, No.I33–5 and No.I33–11

—

Go to Step 11

Go to Step 10

10

Replace the actuator.

Is the action complete?

—

Verify repair

—

11

Replace the auto air conditioner control unit.

Is the action complete?

—

Verify repair

—

 

 

 

 

 

 

 

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