Isuzu 1999 RODEO Workshop Manual page 918

DTC P0532 A/C Refigerant Pressure Sensor Circuit Low Input
Step
1 Was the "On–Board Diagnostic (OBD) System Check"
performed?
2 1. Ignition ON, Engine OFF.
2. Review and record Scan Tool's Failure Records
data, then clear the DTC's.
3. Operate the vehicle within the Failure Records
conditions as noted.
4. Using the Tech 2, monitor "DTC" info for DTC
P0532.
Does the Tech 2 indicate DTC P0532 "Ran and
Passed?"
3 1. Ignition OFF.
2. Disconnect the A/C refrigerant pressure sensor
wiring harness connector from the A/C refrigerant
pressure sensor.
3. Start the vehicle, and monitor the A/C refrigerant
pressure value with the Tech 2.
Does the A/C refrigerant pressure sensor value on the
Tech 2 hold steadily at the given value?
4 Check the A/C refrigerant pressure sensor signal
circuit, between the A/C refrigerant pressure sensor
and the Powertrain Control Module (PCM), for a short
to voltage.
Was the problem found?
5 Check the A/C refrigerant pressure sensor signal
circuit, between the A/C refrigerant pressure sensor
and the PCM for the following conditions:
f
A short to ground
f
An open circuit
Was the problem found?
6 Check the 5 volt signal circuit, between the A/C
refrigerant pressure sensor and the PCM, for the
following conditions:
f
An open circuit
f
A short to voltage
f
A short to ground
Was the problem found?
7 1. Ignition OFF.
2. Place a Digital Voltmeter (DVM), set to measure
voltage between the 5 volt signal circuit and ground.
3. Ignition ON, Engine OFF.
Does the DVM indicate the following value?
RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
Action Value(s) Yes
— Go to Step 2
Refer to
Diagnostic
— Aids
less than 0.1
volts Go to Step 5
— Verify repair
— Verify repair
— Verify repair
about 5 volts Go to Step 8
6E1–291
No
Go to OBD
System
Check
Go to Step 3
Go to Step 4
Go to Step 12
Go to Step 6
Go to Step 7
Go to Step 12