Isuzu 1999 RODEO Workshop Manual page 1305

6E2–62
RODEO 6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS
A/C Clutch Control Circuit Diagnosis (Cont'd)
Step
39 Check for a damaged pin or terminal at B-14 of the
PCM.
Was a damaged pin or a terminal found?
40 1. A/C compressor relay removed.
2. Connect a fused jumper at the A/C compressor
relay socket between either BRN wire and the
BRN/YEL wire.
3. Engine idling.
4. A/C "ON."
5. Blower "ON."
Did the compressor magnetic clutch engage?
41 Repair the A/C compressor relay.
Is the action complete?
42 Check for an open circuit between the A/C compressor
relay and the A/C clutch.
Was an open circuit found?
43 Repair the open circuit between the compressor Clutch
and the A/C compressor relay.
Is the action complete?
44 Service the compressor clutch or replace the
compressor due to a faulty internal overheat switch.
Is the action complete?
45 1. Remove the A/C compressor relay.
2. Idle the engine.
Is the compressor clutch still engaged when A/C is not
selected?
46 Repair the short to voltage between the A/C clutch and
A/C compressor relay.
Is the action complete?
47 1. Reinstall the A/C compressor relay.
2. Remove the A/C thermostat relay.
3. Engine idling.
Is the compressor clutch still engaged when A/C is not
selected?
48 Use a DVM to check for a short to ground between the
A/C compressor relay and B-14 of the PCM.
Was a short detected?
49 Repair the short to ground between the PCM and A/C
compressor relay.
Is the action complete?
50 Repair the short to ground between the A/C thermostat
relay and the electronic thermostat.
Is the action complete?
Action Value(s) Yes
— Go to Step 32
— Go to Step 41
— Verify repair
— Go to Step 43
— Verify repair
— Verify repair
— Go to Step 46
— Verify repair
Go to Step 48
—
— Go to Step 49
— Verify repair
— Verify repair
No
Go to Step 33
Go to Step 42
—
Go to Step 44
—
—
Go to Step 47
—
Go to Step 50
Go to Step 33
—
—