Isuzu 1999 RODEO Workshop Manual page 842

A poor connection at the PCM. Inspect the knock sensor
and the PCM connectors for: , broken locks, improperly
formed or damaged terminals.
f Backed out terminals
f Broken locks
f Improperly formed or damaged terminals
Also, check the wiring harness for: shorts to ground,
shorts to battery positive, and open circuits.
f A misrouted harness.
harness in order to ensure that it is not routed too close
to high voltage wires such as spark plug leads.
f Improper Knock Sensor torque specification. Torque
the Knock Sensor to 19N·m (14 lbs·ft).
Fastener Notice.
Step
1 Was the Powertrain "On–Board Diagnostic (OBD)
System Check" performed?
2 1. Operate the engine within the conditions specified
in the diagnostic support Conditions for Setting the
DTC.
2. Using a Tech 2, monitor theDiagnostic Trouble
Code information for Diagnostic Trouble Code
P0327 until the Diagnostic Trouble Code P0327 test
runs.
3. Observe the test results.
Does the Tech 2 indicate the DTC P0327 failed this
ignition?
3 1. Turn ON the Ignition leaving the engine OFF.
2. Review the Tech 2 Fail Records data.
3.
IMPORTANT: Before clearing the DTCs, use the Tech
2 to record the Freeze Frame and the Failure Records
for reference. This data will be lost when the Clear Info
function is used.
4. Record the Tech 2 Fail Records data.
5. Operate the vehicle within the Fail Records
conditions.
6. Using a Tech 2, monitor the DTC info for the DTC
P0327 until the DTC P0327 test runs.
7. Observe the test results.
Does the Tech 2 indicate the DTC P0327 Failed This
Ignition?
4 1. Disconnect the KS Sensor electrical connector.
2. Using a Digital Voltmeter (DVM), measure the
voltage between the KS signal circuit at the knock
sensor harness connectors and ground.
Is the voltage at the specified value?
5 Measure the resistance of the KS sensor by connecting
the between the KS sensor terminal and the engine
block.
Is the resistance of the KS sensor near the specified
value?
RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
Inspect the knock sensor
Refer to
DTC P0327 KS Circuit Low Input
Action
Review the Fail Records vehicle mileage since the
diagnostic test last failed in order to help determine how
often the conditions that caused the DTC to set occur.
This may assist in diagnosing the condition.
Test Description
Number(s) below refer to the step number(s) on the
Diagnostic Chart:
2. Ensures that the fault is present.
6. Ensures that the knock sensor is capable of
detecting detonation.
Value(s)
— Go to Step 2
— Go to Step 4
— Go to Step 4
Approx. 5.0 V Go to Step 5
100K W
Go to Step 6
6E1–215
Yes No
Go to
Powertrain
OBD System
Check
Go to Step 3
Go to
Diagnostic
Aids
Go to Step 8
Go to Step 9