Isuzu 1999 RODEO Workshop Manual page 1303

6E2–60
RODEO 6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS
A/C Clutch Control Circuit Diagnosis (Cont'd)
Step
15 1. Remove the glove box to gain access to the A/C
thermostat.
2. Disconnect the thermostat connector.
3. Attach a fused jumper between ground and the
GRN/RED wire at the thermostat.
4. A/C "ON."
5. Blower "ON."
Dose A/C request indicate "YES" on the Tech 2?
16 1. Ignition "ON."
2. A/C switch "ON".
3. Use a DVM to check voltage at the electronic A/C
thermostat.
Was voltage equal to the specified value?
17 Check for an open (LT GRN/BLK) wire between the
thermostat and the A/C switch.
Was the wire open?
18 Repair the open wire (LT GRN/BLK) between the
thermostat and the A/C switch.
Is the action complete?
19 Replace the A/C switch.
Is the action complete?
20 Use an ohmmeter to check continuity between the
electronic A/C thermostat and the blower switch.
Was there an open circuit?
21 Repair the open wire (WHT) between the thermostat
and the blower switch.
Is the action complete?
22 Replace the electronic A/C thermostat.
Is the an action complete?
23 Check for an open circuit between A/C thermostat relay
and PCM A/C request terminal (E-15).
Was there an open circuit?
24 Repair the open circuit between the PCM and A/C
thermostat relay.
Is the action complete?
25 Check for an open circuit between the engine device
fuse and the A/C thermostat relay (WHT/GRN).
Was there an open circuit?
26 Repair the open circuit between the engine device fuse
and the A/C thermostat relay.
Is the action complete?
27 1. Ignition "ON."
2. Use a DVM to check voltage at the A/C pressure
switch (BRN).
Was voltage equal to the specified value?
Action Value(s) Yes
Go to Step 16
—
Go to Step 20
B+
— Go to Step 18
— Verify repair
— Verify repair
— Go to Step 21
— Verify repair
— Verify repair
— Go to Step 24
— Verify repair
Go to Step 26
—
— Verify repair
Go to Step 29
B+
No
Go to Step 23
Go to Step 17
Go to Step 19
—
—
Go to Step 22
—
—
Go to Step 25
—
Go to Step 27
—
Go to Step 28