Isuzu 1999 RODEO Workshop Manual page 853

6E1–226 RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
f Poor connection – Inspect the PCM harness and
connectors for improper mating, broken locks,
improperly formed or damaged terminals, and poor
terminal–to–wire connection.
f Damaged harness – Inspect the wiring harness for
damage; shorts to ground, shorts to battery positive
and open circuits. If the harness appears to be OK,
disconnect the PCM, turn the ignition ON and observe
a voltmeter connected to the CMP signal circuit at the
DTC P0342 – Camshaft Position Sensor Circuit Low Input
Step
1 Was the "On–Board Diagnostic (OBD) System Check"
performed?
2 1. Ignition ON.
2. Review and record Tech 2 Failure Records data.
3. Operate the vehicle within Failure Records
conditions as noted.
4. Using a Tech 2, monitor "DTC" information for DTC
P0342 until the DTC P0342 test runs.
Did the Tech 2 indicate DTC P0342 failed this ignition
cycle?
3 1. Use a Digital Voltmeter (DVM) to monitor voltage on
the CMP signal circuit while cranking the engine.
Does the voltage toggle between the specified values?
4 Check for a poor connection of the CMP signal wire at
the PCM terminal.
Was a poor connection found?
5 Repair the damaged pin or terminal at the PCM.
6 Replace the PCM.
IMPORTANT: The
programmed. Refer to On–Vehicle Service in
Powertrain Control
procedures.
And also refer to latest Service Bulletin.
Check to see if the Latest software is released or not.
And then Down Load the LATEST PROGRAMMED
SOFTWARE to the replacement PCM.
Is the repair complete?
7 1. Disconnect the CMP connector from the CMP
Sensor.
2. Ignition ON.
3. At the CMP connector, check the voltage between
the voltage signal wire and sensor ground.
Does the DVM indicate the specified value?
8 1. Ignition ON.
2. Use a DVM to measure between the ground and the
CMP positive connector.
Does the DVM indicate the specified value?
9 Repair the open circuit.
Is the repair complete?
Action
replacement PCM must
Module and Sensors
PCM harness connector while moving connectors and
wiring harnesses related to the CMP sensor. A change
in voltage will indicate the location of the fault.
Test Description
Number(s) below refer to the step number(s) on the
Diagnostic Chart:
2. Ensures that the fault is present.
Value(s)
— Go to Step 2
— Go to Step 3
0–4 V Go to Step 4
— Go to Step 5
— Verify repair
be
for
— Verify repair
Go to Step
B+
Go to Step
B+
— Verify repair
Yes No
Go to OBD
System
Check
Refer to
Diagnostic
Aids
Go to Step 7
Go to Step 6
—
—
Go to Step 8
12
10 Go to Step 9
—