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P0100-MASS AIR FLOW SENSOR SIGNAL VOLTAGE TOO HIGH —
Continued
SENSOR REFERENCE VOLTAGE A CIRCUIT SHORTED TO GROUND
MAF SENSOR SIGNAL CIRCUIT SHORTED TO THE SENSOR GROUND CIRCUIT
FUEL PRESSURE SENSOR 5-VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE
SENSOR REFERENCE VOLTAGE A CIRCUIT SHORTED TO VOLTAGE
MAF SENSOR CIRCUIT SHORTED TO VOLTAGE
ECM - MAF SENSOR SIGNAL CIRCUIT
TEST
1
NOTE: If DTC P0641 or P0651 is present with this DTC, diagnose DTCs
P0641 and P0651 before diagnosing this DTC.
NOTE: Inspect the turbocharger inlet tube between the MAF Sensor and the
turbocharger for damage, restriction or poor connection. Any of these
conditions can cause a MAF Plausibility DTC.
Turn the ignition on.
With the DRBIII , erase the ECM DTCs.
Test drive the vehicle.
With the DRBIII , read the ECM DTCs.
Does the DRB III display a Mass Air Flow Sensor DTC?
Yes → Go To 2
→ Go To 18
No
2
Turn the ignition off.
Disconnect the MAF Sensor harness connector.
Turn the ignition on.
Measure the voltage of the Sensor Reference Voltage A circuit in MAF Sensor harness
connector.
Is the voltage between 4.7 and 5.3 volts?
Yes → Go To 3
→ Go To 11
No
3
Turn the ignition off.
Disconnect the MAF Sensor harness connector.
Disconnect the ECM harness connectors.
Remove the ASD Relay from the PDC.
Connect a jumper wire between cavity 30 and cavity 87 of the ASD Relay connector.
Turn the ignition on.
Measure the voltage of the MAF Sensor Signal circuit.
Is the voltage above 1.0 volt?
Yes → Repair the MAF Sensor Signal circuit for a short to voltage.
→ Go To 4
No
POSSIBLE CAUSES
ACTION
Perform ROAD TEST VERIFICATION - VER-2.
DRIVEABILITY - DIESEL
21
APPLICABILITY
All
All
All
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