Isuzu 2000 Trooper Workshop Manual page 156

Chart C: Fan Does Not Rotate In Any Mode Other Than MAX HI
Step
1 Is the power transistor performance normal? (Refer to
the later section on "individual inspection")
2 Is there continuity between the harness side connector
terminal No.B5–2 and No.I50–1, No.B5–2 and
No.I33–17?
3 Repair an open circuit between terminal.
No.B5–2 and I50–1
No.B5–2 and I33–17
4 Is there continuity between the harness side connector
terminal No.I50–3 and ground (No.B–2)?
5 Repair an open circuit between terminal No.I50–3 and
ground.
Is the action complete?
6 Is there continuity between the harness side connector
terminal No.I50–2 and No.I33–19?
7 Repair an open circuit between terminal No.I50–2 and
No.I33–19.
Is the action complete?
8 Replace the auto air conditioner control unit.
Is the action complete?
HEATING, VENTILATION AND AIR CONDITIONING (HVAC) 1A–127
Action Value(s) Yes
— Go to Step 2
— Go to Step 4
— Go to Step 2
— Go to Step 6
— Go to Step 4
— Go to Step 8
— Go to Step 6
— Verify repair
No
Replace the
power
transistor
Go to Step 3
—
Go to Step 5
—
Go to Step 7
—
—