Engine Control System (4HK1) 1A-259
Circuit/ System Testing DTC P2123
11
Important:
Replacement ECM must be
programmed and learned.
Replace the ECM. Refer to ECM Replacement.
Did you complete the replacement?
—
Go to Step 12
—
12
1.
Reconnect all previously disconnected
harness connector(s).
2.
Clear the DTCs with a scan tool.
3.
Turn OFF the ignition for 30 seconds.
4.
Start the engine.
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?
0.2 volts
Go to Step 3
Go to Step 13
13
Observe the DTC Information with a scan tool.
Are there any DTCs that you have not
diagnosed?
—
Go to DTC List
System OK
Step
Action
Value(s)
Yes
No
Step
Action
Value(s)
Yes
No
1
Did you perform the Diagnostic System Check
- Engine Controls?
—
Go to Step 2
Go to Diagnostic
System Check -
Engine Controls
2
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
Position (APP) Sensor 1 parameter with a
scan tool.
Does the scan tool indicate more than the
specified value during depressing or releasing
the pedal?
4.9 volts
Go to Step 3
Go to Diagnostic
Aids
3
Monitor the DTC Information with a scan tool.
Is DTC P0641 also set?
—
Go to Step 4
Go to Step 5
4
1.
Turn OFF the ignition.
2.
Disconnect the APP sensor harness
connector.
3.
Turn ON the ignition, with the engine OFF.
Is the APP Sensor 1 parameter less than the
specified value?
0.1 volts
Go to DTC P0641
Go to Step 7
5
1.
Turn OFF the ignition.
2.
Disconnect the APP sensor harness
connector.
3.
Turn ON the ignition, with the engine OFF.
Is the APP Sensor 1 parameter less than the
specified value?
0.1 volts
Go to Step 6
Go to Step 7
LG4HKED-WE-0871.book 259
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