The Crankshaft Position (CKP) sensor is connected to the Ignition Control (IC) module. The CKP sensor is mounted near the crankshaft and monitors a toothed crankshaft reluctor wheel. When the toothed reluctor wheel (and the crankshaft) spins, a signal is induced into the CKP sensor. Based upon the signal that is received from the CKP sensor the IC module supplies a CKP signal on the CKP 7X reference circuit. For each one engine revolution the IC module pulses the CKP 7X reference circuit 7 times. The gasoline control module (VCM/PCM or ECM) and the AF ECU use the CKP 7X signal to determine engine speed, crankshaft position and if a cylinder misfire is present.
This DTC is used to indicate no CKP reference signal is being monitored by the AF ECU while engine sensor conditions indicate the crankshaft is rotating.
• | The engine is operating on alternative fuel for an initial failure. The AF ECU will run this DTC in gasoline mode after an initial alternative fuel mode failure. |
• | The MAP sensor signal indicates 105.23 kPa (31.07 in Hg) or less. |
• | A cam signal is monitored indicating the engine is cranking or running. |
The AF ECU monitors no CKP reference signal when a cam sensor signal is monitored.
The AF ECU will switch-over to gasoline fuel operation. The AF ECU will not attempt alternative fuel operation until the next ignition key cycle.
• | The AF ECU will illuminate the MIL and store the DTC as History during ONE drive trip in which the diagnostic runs and fails. |
• | The AF ECU will record operating conditions at the time the DTC sets. This information will be stored as Freeze Frame data. |
• | The Last Test Failed status will clear when the DTC runs and passes. |
• | The AF ECU will turn OFF the MIL after 3 consecutive drive trips that the DTC runs and passes. |
• | The History status will clear after 40 consecutive WARM-UP cycles with NO failures of ANY DTC. |
• | All DTC Information can be cleared using a scan tool. |
• | Interruption of Control Module (AF ECU / VCM / PCM or ECM) power or ground MAY clear DTC Information. Clearing DTC Information with this method is inconsistent and should not be performed. |
A fault not present indicates the condition that caused the DTC to set is intermittent and not currently present. Refer to Intermittent Conditions diagnostic information located in Symptoms-Engine Controls. If any additional DTCs were stored, proceed to the applicable DTC table in the order stated in the Diagnostic System Check - Alternative Fuels (Engine Controls) .
The number below refer to the step number on the diagnostic table.
Step | Action | Yes | No |
---|---|---|---|
1 | Did you perform the Alternative Fuels Engine Controls Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Alternative Fuels (Engine Controls) |
Crank and attempt to start the engine. Does the engine start and run? | Go to Step 3 | Go to Engine Cranks but Does Not Run in Engine Controls-2.2L (LN2) in the J Platform Service Manual. | |
3 |
Are any gasoline powertrain control module DTCs set? | Go to Diagnostic Trouble Code (DTC) Types in Engine Controls-2.2L (LN2) in the J Platform Service Manual. | Go to Step 4 |
4 |
Did DTC P0336 set? | Go to Step 6 | Go to Step 5 |
5 | The fault is not present. Refer to Diagnostic Aids. Are any DTCs stored that have not been diagnosed? | Go to Intermittent Conditions | |
6 |
Was a repair necessary? | Go to Step 8 | Go to Step 7 |
7 |
Is the replacement complete? | Go to Step 8 | -- |
8 |
Did this DTC RUN and PASS? | System OK | Go to Step 2 |