Isuzu 2000 Trooper Workshop Manual page 148

Chart A: Does Not work At All
Step
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 (+)?
2 Replace the auto air conditioner control unit.
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 (-)?
4 Replace the auto air conditioner control unit.
5 Is there continuity between the harness side connector
terminal No.I32–6 and No.I45–6?
6 Repair an open circuit between terminal No.I32–6 and
No.I45–6.
Is the action complete?
7
Is there continuity between the harness side connector
terminal No.I32–5 and No.I45–8?
8 Repair an open circuit between terminal No.I32–5 and
No.I45–8.
Is the action complete?
9 Replace the mix actuator.
Is the action complete?
HEATING, VENTILATION AND AIR CONDITIONING (HVAC) 1A–119
Action Value(s) Yes
— Go to Step 3
— Varify repair
— Go to Step 5
— Verify repair
— Go to Step 7
— Go to Step 5
— Go to Step 9
— Verify repair
— Verify repair
No
Go to Step 2
—
Go to Step 4
—
Go to Step 6
—
Go to Step 8
—
—