Isuzu N 2008 Series Workshop Manual page 136

Step
1. Inspect the CKP sensor and sensor rotor for
the following conditions:
• Physical damage of sensor
• Loose or improper installation of sensor
• Excessive air gap
• Foreign material passing between sensor
4
and sensor rotor
• Physical damage of sensor rotor
• Loose or improper installation of sensor
rotor
2. Repair or replace as necessary.
Did you find and correct the condition?
Replace the CKP sensor. Refer to CKP Sensor in
Section 1B Engine Mechanical.
5
Did you complete the replacement?
1. Reconnect
harness connector(s).
2. Clear the DTCs with a scan tool.
3. Turn OFF the ignition for 30 seconds.
4. Start the engine.
6
5. Accelerate the engine between idle and
W.O.T. (accelerator pedal full travel) many
times while observing the Engine Speed
parameter with a scan tool.
Does the Engine Speed parameter ever exceed the
specified value?
Observe the DTC Information with a scan tool.
7
Are there any DTCs that you have not diagnosed?
Action
all previously disconnected
Engine Control System (4JJ1)
Value(s) Yes
—
Go to Step 6
—
Go to Step 5
4000 RPM
Go to Step 4
—
Go to DTC List
1A-133
No
Go to Step 5
—
Go to Step 7
System OK