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Home >> Dodge and Ram >> 2003 >> Durango Base, 5.9 Z, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 17 (Engine Controls - Self-Diagnostics - 3.9L & 5.9L) >> Diagnostic Tests >> DTC P1296: No 5-Volts To Map Sensor >> Testing

DTC P1296: No 5-Volts To Map Sensor: Testing

WARNING: This page is about a different car, the 2003 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: If DTC P0107 is also set, diagnose it before continuing. See DTC P0107: MAP SENSOR VOLTAGE TOO LOW  .
  1. Turn ignition on, with engine off. With the DRBIII(R) scan tool, read the DTCs and record the related freeze frame data. With the DRBIII(R) scan tool in Sensors, read the MAP sensor voltage. Is the voltage less than 2.35 volts? If yes, go to next step. If no, see INTERMITTENT CONDITION  under SELF-DIAGNOSTIC SYSTEM.
  2. Turn the ignition off. Disconnect the MAP sensor harness connector. Turn ignition on, with engine off. Measure the voltage on the (K7) 5-volt supply circuit at the MAP sensor harness connector. Is the voltage more than 4.5 volts? If yes, go to next step. If no, go to step  4 .
  3. With the DRBIII(R) in Sensors, read the MAP sensor voltage with the sensor harness connector disconnected. Is the voltage more than 4.5 volts? If yes, replace the MAP sensor. If no, go to step  7 .
  4. Measure the voltage on the (K7) 5-volt supply circuit in the MAP sensor harness connector while disconnecting the remaining sensors that share the (K7) 5-volt supply circuit. Does the voltage return to approximately 5.0 volts with any sensor disconnected? If yes, replace the sensor that pulled the (K7) 5-volt supply circuit low. If no, go to next step.
  5. Turn the ignition off. Disconnect the PCM harness connectors. Measure the resistance of the (K7) 5-volt supply circuit from the MAP sensor harness connector to the PCM harness connector. Is the resistance less than 5.0 ohms? If yes, go to next step. If no, repair the excessive resistance in the (K7) 5-volt supply circuit.
  6. Measure the resistance between ground and the (K7) 5-volt supply circuit in the MAP sensor harness connector. Is the resistance less than 100 ohms? If yes, repair the short to ground in the (K7) 5-volt supply circuit. If no, go to next step.
    7. NOTE: Before continuing, disconnect the PCM harness connectors and check the related wiring terminals for corrosion, damage or terminal push out. Repair as necessary.
  7. Using the wiring diagram as a guide, inspect the wire harness and connectors. Visually inspect the related wire harness. Look for any chafed, pierced, pinched, or partially broken wires. Visually inspect both the component and the PCM connectors. Pay particular attention to all power and ground circuits. If there are no possible causes remaining, replace and program the PCM. See PROGRAMMING  .
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