Circuit Description
The PCM has the ability to dtermine the amount of offset needed to bring the engine to top dead center. This is used by the PCM to determine proper injection time.
Conditions for Setting the DTC
TDC offset greater than 2.46 degrees
or
TDC Offset less than -2.46 degrees.
Action Taken When the DTC Sets
The MIL will illuminate on 2 test failures.
Conditions for Clearing the MIL/DTC
| • | The PCM will turn the MIL off after three consecutive trips without a fault condition. |
| • | A History DTC will clear when forty consecutive warm-up cycles that the diagnostic does not fail (coolant temperature has risen 5°C (40°F) from start up coolant temperature and engine coolant temperature exceeds 71°C (160°F) that same ignition cycle. |
| • | Use of a Scan Tool |
Diagnostic Aids
The PCM will only run the diagnostic test when a time set procedure has been activated. It is highly unlikely that the vehicle will be brought in with this DTC set. Refer to Fuel Injection Pump Top Dead Center Offset Adjustment .
Step | Action | Value(s) | Yes | No | ||||
|---|---|---|---|---|---|---|---|---|
1 |
Important: Before clearing DTCs use the scan tool Capture Info to record freeze frame and failure records for reference, as data will be lost when Clear Info function is used. Was the Powertrain On-Board Diagnostic (OBD) System Check performed? | -- | ||||||
2 | Are there any other DTCs set? | -- | Go to the Applicable DTC Table | |||||
3 | Clear all codes and reset injection timing until TDC Offset is between specified values. Refer to Fuel Injection Pump Top Dead Center Offset Adjustment . Is timing within specified value? | -0.25 to -0.75 | ||||||
4 | Check the crankshaft position sensor for the following.
Was a repair performed? | -- | ||||||
5 | Replace the Injection Pump. Important: The new injection pump must be timed. Refer to Fuel Injection Pump Replacement . Is the action complete? | -- | -- | |||||
6 |
Does the Scan Tool indicate that this diagnostic Passed? | -- | ||||||
7 | Using the Scan Tool, select Capture Info, Review Info. Are any DTCs displayed that have not been diagnosed? | -- | Go to the Applicable DTC Table | System OK |
