DTC P1296: No 5 Volts To Map Sensor: Testing
NOTE:
If DTC P0107 is also present with DTC P1296, repair DTC P0107 before continuing with this test. See DTC P0107: MAP SENSOR VOLTAGE TOO LOW
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- Turn ignition on. Using scan tool, read Manifold Absolute Pressure (MAP) sensor voltage. If voltage is less than 2.35 volts, go to next step. If voltage is 2.35 volts or more, go to step 6 .
- Turn ignition off. Disconnect MAP sensor connector. See Fig 1 . Inspect connector for damaged pins, corrosion and loose terminals. Repair connector as necessary. If connector terminals are okay, turn ignition on. Measure voltage between ground and Orange wire at MAP sensor harness connector. If voltage is more than 4.5 volts, go to next step. If voltage is 4.5 volts or less, repair 5-volt supply circuit (Orange wire) between MAP sensor and PCM.
- Using scan tool, read MAP sensor voltage. If voltage is 4.5 volts or less, go to next step. If voltage is more than 4.5 volts, replace MAP sensor.
- Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. PCM is located in engine compartment on left front fender, near radiator support. Inspect connectors for damaged pins, corrosion and loose terminals. Repair connectors as necessary. If connectors are okay, measure resistance between ground and Orange wire at MAP sensor harness connector. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground in 5-volt supply circuit (Orange wire).
- At this time, PCM is assumed to be defective. Replace PCM.
- Start engine and allow it to idle. Wiggle connectors and wiring harness from MAP sensor to PCM while monitoring MAP sensor voltage. See Fig 1 . If voltage changes while wiggling connectors and wiring harness, repair connectors and wiring harness where wiggling caused voltage to change. If voltage does not change, no problem is indicated at this time. Test is complete.