Circuit Description
The PCM uses a calibrated resistor mounted internally in the injection pump to determine fuel rates. The resistor value is stored in the PCM memory. If the PCM memory has been disturbed or the PCM has been replaced, the PCM will relearn the resistor value on the next ignition cycle. This is a type B DTC.
Conditions for Setting the DTC
| • | PCM currently does not have a valid resistor valve. |
| • | PCM is unable to read a resistor value |
Action Taken When the DTC Sets
The lowest fuel table. Possible poor performance problem.
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
Check connection at fuel injector driver. Clear DTC, and cycle ignition. If DTC clears, treat condition as an intermittent.
Test Description
Number(s) below refer to the Step number(s) on the Diagnostic Table.
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 On-Board Diagnostic (OBD) System Check performed? | -- | ||
2 | Are than any other DTCs set? | -- | Refer to Applicable DTC Table | |
Does the DTC clear? | -- | |||
4 | Replace injection pump. Refer to Fuel Injection Pump Replacement . Is the action complete? | -- | -- | |
5 |
Does the Scan Tool indicate that this diagnostic Ran and Passed? | -- | ||
6 | 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 |
