Circuit Description
The injection pump delivers fuel to individual cylinders by opening and closing a solenoid control fuel valve. The PCM monitors the amount of time it takes for the fuel solenoid valve to physically close after commanded to close. Closure time out of range is seen as a fault. This response time is measured in milli seconds.
Conditions for Running the DTC
| • | Battery voltage greater than 11 volts and less than 15 volts. |
| • | Engine coolant temperature greater than -1°C (34°F). |
| • | Engine speed greater than 506 rpm. |
| • | Requested fuel rate is greater than 0.0 mm |
Conditions for Setting the DTC
Inj. Pump Closure Time less than 0.75 ms.
Action Taken When the DTC Sets
| • | The PCM will not illuminate the malfunction indicator lamp (MIL). |
| • | The PCM records the operating conditions at the time the diagnostic fails. This information is stored in the Failure Records. |
Conditions for Clearing the MIL/DTC
| • | A History DTC will clear after forty consecutive engine warm up cycles, if this or any other emmision related diagnosic does not report any failures. |
| • | Use of a scan tool |
Diagnostic Aids
Intermittent DTCs (P0251, P0370 and P1216) may be caused by air entering the fuel system when fuel levels get below 1/8 of a tank while performing hard acceleration or turning maneuvers. It's also possible that a P0251, P0370 and P1216 will set if the vehicle has run out of fuel. Customer driving habits should be checked to determine if the vehicle has been performing in these manners. If the vehicle has been performing in these conditions, bleed the fuel system of all air and test drive vehicle.
If DTC P1216 is set with any other DTCs, diagnose them first. If the vehicle is running close to the DTC setting closure time, the vehicle should be checked during cold start ups and during hot conditions.
Test Description
Number(s) below refer to the step number(s) on the Diagnostic Table.
-
This step will determine if the ground circuit is open which causes the vehicle not to start.
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This step will determine if the signal circuit is open or an injection pump (fuel solenoid) is at fault.
Step | Action | Value(s) | Yes | No |
1 |
Important: Before clearing any DTCs, use the scan tool Capture Info to save the Freeze Frame and Failure records for reference. The control module's data is deleted once the Clear Info function is used. Did you perform the Powertrain On-Board Diagnostic (OBD) System Check? | -- | ||
Is DTC P0219 set? | -- | |||
Will the engine start? | -- | |||
4 |
Is the scan tool display less than or equal to the specified value? | 0.75 ms | ||
5 |
Is the Inj. Pump Closure Time display less than or equal to the specified value? | 0.1 ms | ||
6 | The DTC is intermittent. If no additional DTCs are stored, refer to Diagnostic Aids. If additional DTCs were stored refer to those applicable DTC table(s) first. Are any additional DTCs stored? | -- | Go to the applicable DTC table | -- |
7 |
Did you perform a repair? | -- | ||
8 |
Did you perform a repair? | -- | ||
9 | Check the Closure signal circuit for a proper connection at the PCM and replace the terminal if necessary. Did the terminal require replacement? | -- | ||
10 | Replace the Injection pump. Refer to Fuel Injection Pump Replacement . Important: The new injection pump must be timed. Refer to Fuel Injection Pump Timing Adjustment . Is the action complete? | -- | -- | |
11 | Replace the PCM. Important: The new PCM must be programmed. Refer to Powertrain Control Module Replacement/Programming . Is the action complete? | -- | ||
12 |
Does the scan tool indicate the diagnostic Passed? | -- | ||
13 | Does the scan tool display any additional undiagnosed DTCs? | -- | Go to the applicable DTC table | System OK |
