Isuzu 2008MY N Series Workshop Manual page 267

1A-264 Engine Control System (4HK1)
Step
Important:
programmed and learned.
11
Replace the ECM. Refer to ECM Replacement.
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.
12
5. Fully depress and release the accelerator
pedal while observing the APP Sensor 1
parameter with the scan tool.
Does the scan tool indicate less than the
specified value during depressing or releasing
the pedal?
Observe the DTC Information with a scan tool.
13
Are there any DTCs that you have not
diagnosed?
Circuit/ System Testing DTC P2128
Step
Did you perform the Diagnostic System Check
1
- Engine Controls?
1. Install a scan tool.
2. Turn OFF the ignition for 30 seconds.
3. Start the engine.
4. Fully depress and release the accelerator
pedal while observing the Accelerator Pedal
2
Position (APP) Sensor 2 parameter with a
scan tool.
Does the scan tool indicate more than the
specified value during depressing or releasing
the pedal?
Monitor the DTC Information with a scan tool.
3
Is DTC P0651 also set?
1. Turn OFF the ignition.
2. Disconnect
connector.
4
3. Turn ON the ignition, with the engine OFF.
Is the APP Sensor 2 parameter less than the
specified value?
1. Turn OFF the ignition.
2. Disconnect
connector.
5
3. Turn ON the ignition, with the engine OFF.
Is the APP Sensor 2 parameter less than the
specified value?
Action
Replacement ECM
all previously disconnected
Action
the APP sensor
the APP sensor
Value(s)
must be
—
0.2 volts
—
Value(s)
—
4.9 volts
—
harness
0.1 volts
harness
0.1 volts
Yes
Go to Step 12
Go to Step 3
Go to DTC List
Yes
Go to Diagnostic
System Check -
Go to Step 2 Engine Controls
Go to Diagnostic
Go to Step 3
Go to Step 4
Go to DTC P0651
Go to Step 6
No
—
Go to Step 13
System OK
No
Aids
Go to Step 5
Go to Step 7
Go to Step 7