Refer to
Ignition Control (IC) Module
for wiring view.
Circuit Description
This diagnostic test checks to see if there are eight 4X reference pulses between CAM signals. Do not attempt diagnosis or repair unless the customer is experiencing driveability problems associated with this DTC.
Conditions for Setting the DTC
Test Conditions
| • | DTC P1376 not set. |
| • | Engine speed greater than 496 RPM. |
| • | Number of CAM pulses received since key ON is 7 or greater. |
Failure Condition
The number of 4X reference pulses during two CAM pulses periods is not 16 at least 2 times in a row.
Action Taken When the DTC Sets
| • | The PCM will illuminate the malfunction indicator lamp (MIL) when the diagnostic runs and fails. |
| • | The PCM will record operating conditions at the time the diagnostic fails. This information will be stored in the Freeze Frame and Failure Records. |
Conditions for Clearing the MIL/DTC
| • | The PCM will turn the MIL OFF after three consecutive drive trips that the diagnostic runs and does not fail. |
| • | A Last Test Failed (current) DTC will clear when the diagnostic runs and does not fail. |
| • | A History DTC will clear after forty consecutive warm-up cycles with no failures of any emission related diagnostic test. |
| • | Use a scan tool to clear DTCs. |
| • | Interrupting PCM battery voltage may or may not clear DTCs. This practice is not recommended. Refer to Clearing Diagnostic Trouble Codes in PCM Description and Operation. |
Diagnostic Aids
Since this DTC can set under normal conditions no diagnosis should be performed unless a driveability complaint is present.
This DTC may also set if all four camshafts are off by one tooth, 10 degrees before top dead center, this will be accompanied by severe driveability complaints.
Test Description
Number(s) below refer to the step number(s) on the Diagnostic Table.
Step | Action | Value(s) | Yes | No | ||||
|---|---|---|---|---|---|---|---|---|
1 | Was the Powertrain On-Board Diagnostic (OBD) System Check performed? | -- | Go to A Powertrain On Board Diagnostic (OBD) System Check | |||||
Are any other DTCs set? | -- | Go to DTCs that are set | ||||||
3 | Is this DTC set along with a driveability complaint? | -- | Fault not present. Refer to Diagnostic Aids | |||||
4 |
Were any causes of EMI found and repaired? | -- | Go to Powertrain Control Module Diagnosis for Verify Repair | |||||
5 | Check for an intermittent short to ground, short together or open condition on the Fuel Control (4X) circuit, the Cam Signal circuit, the Cam Low circuit and the Cam High circuit. Were any causes found and repaired? | -- | Go to Powertrain Control Module Diagnosis for Verify Repair | |||||
6 |
Was terminal contact repaired? | -- | Go to Powertrain Control Module Diagnosis for Verify Repair | |||||
7 |
Was terminal contact repaired? | -- | Go to Powertrain Control Module Diagnosis for Verify Repair | Fault not present. Refer to Diagnostic Aids |
