Circuit Description
Timing of the combustion event is accomplished by delivering a pulse of fuel into the combustion chamber at a desired degree of cylinder travel. This desired degree (desired timing), defines the current position of the cylinder in relationship of Top Dead Center. This test compares desired timing to measured timing when certain conditions have been met. To retard injection timing the PCM extends the Stepper motor. To advance injection timing the PCM retracts the Stepper motor. This is a type B DTC.
Conditions for Setting the DTC
| • | Engine speed has not changed more than 56 RPM for 20.8 seconds. |
| • | A 5 degree difference between Act. Inj. Time and Des. Inj. Time |
Action Taken When the DTC Sets
The MIL will illuminate on the second test fail.
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
An intermittent may be caused by the following:
| • | Poor connections |
| • | Rubbed through wire insulation |
| • | Broken wire inside the insulation |
A hard start and possible poor performance condition might exist. Act. Inj. Time will freeze at the point of the fault. Its possible DTC P0216 will set if injection timing is not set correctly. Refer to Checking/Adjust Injection Timing for correct procedure.
Test Description
Number(s) below refer to the step number(s) on the Diagnostic Table.
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This step determines if DTC P0216 is a hard failure or an intermittent.
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This step checks for an open or short in the injection timing coil circuit 1.
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This step checks for an open or short in the injection timing coil circuit 2.
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The important thing in this step is that the PCM is sending a varying voltage (voltage may vary between 1 and 12 (usually you will see voltage vary between 5 and 6 when engine is idling)), this will indicate that the PCM is OK and that there is a problem with the injection timing Stepper motor. If there is a steady voltage present on any circuit, this will indicate a problem with the PCM or a circuit shorted to voltage.
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? | -- | ||||||||
Does scan tool display a difference greater than or equal to the specified value between Actual Inj Time and Desired Inj Time at idle or at 2700 RPMs? | 5° | |||||||||
3 | DTC is intermittent. If no additional DTCs are stored, refer to Diagnostic Aids. If additional DTCs were stored refer to those table(s) first. Are any additional DTCs stored? | -- | Go to the Applicable DTC Table | Go to Diagnostic Aids
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Is resistance between specified value? | 10 - 60 Ohms | |||||||||
Measure resistance between coil 2 low and coil 2 high at PCM harness. Is resistance between specified value? | 10 - 60 Ohms | |||||||||
Does voltage vary on all circuits? | -- | |||||||||
7 |
Is resistance between specified value? | 950 -1050 Ohms | ||||||||
8 |
Was a repair performed? | -- | ||||||||
9 |
Was a repair performed? | -- | ||||||||
10 |
Was a repair performed? | -- | ||||||||
11 | Check for poor electrical connection at the injection timing Stepper motor. Did any terminals require replacement? | -- | ||||||||
12 | Check the circuit for a short to ground or a poor connection at the PCM. Was a repair performed? | -- | ||||||||
13 |
Was a repair performed? | -- | ||||||||
14 | Check the circuit for a poor connection and replace terminal if necessary. Did the terminal require replacement? | -- | ||||||||
15 | Replace crankshaft position sensor. Refer to Crankshaft Position Sensor Replacement Is the action complete? | -- | -- | |||||||
16 | Replace Injection pump. Refer to Fuel Injection Pump Replacement Important: The new injection pump must be timed. Refer to Checking/Adjust Injection Timing . Is the action complete? | -- | -- | |||||||
17 | Replace the PCM. Important: The new PCM must be programmed. Refer to Powertrain Control Module Replacement/Programming Is the action complete? | -- | -- | |||||||
18 |
Does the Scan Tool indicate that this diagnostic Passed? | -- | ||||||||
19 | 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 |
