Isuzu 1999 RODEO Workshop Manual page 983

6E1–356 RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
Step
1 Was the "On–Board Diagnostic (OBD) System Check"
performed?
2 1. Perform a bulletin search.
2. If a bulletin that addresses the symptom is found,
correct the condition as instructed in the bulletin.
Was a bulletin found that addresses the symptom?
3 Was a visual/physical check performed?
4 Check engine coolant temperature (ECT) sensor for
shift in value.
1. After 8 hours with the hood up and the engine not
running, connect the Tech 2.
2. Ignition ON, engine not running.
3. Using the Tech 2, compare Engine Coolant
Temperature to Intake Air Temperature.
Are ECT and IAT within the specified value of each
other?
5 1. Using a Tech 2, display the engine coolant
temperature and note the value.
2. Check the resistance of the engine coolant
temperature sensor.
3. For resistance specifications, refer to Temperature
vs. Resistance chart in DTC P0118.
Is the actual resistance near the resistance value in the
chart for the temperature that was noted?
6 Replace the ECT sensor.
Is the action complete?
7 Locate and repair high resistance or connection in the
ECT signal circuit or the ECT signal circuit or the PCM
sensor ground.
8 Check for a faulty, plugged, or incorrectly installed PCV
valve.
Was a problem found?
9 Visually/Physically inspect the secondary ignition
wires. Check for the following conditions:
f
Verify that all ignition wire resistance are less than
the specified value.
f
Verify that ignition wires are correctly routed to
eliminate cross–firing.
f
Verify that ignition wires are not arcing to ground.
Spraying the secondary ignition wires with a light
mist of water may help locate an intermittent
problem.
Was a problem found?
10 Check for proper ignition voltage output with a spark
testerJ 26792.
Was a problem found?
Action Value(s) Yes
— Go to Step 2
— Verify repair
— Go to Step 4
5°C ( 9°F) Go to Step 8
— Go to Step 7
— Verify repair
— Verify repair
— Verify repair
22.4 k W
Verify repair
— Verify repair
No
Go to OBD
System
Check
Go to Step 3
Go to Visual /
Physical
Check
Go to Step 5
Go to Step 6
—
—
Go to Step 9
Go to Step 10
Go to Step 11