Diagnostic Aids

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Perform this test only when directed by QUICK TEST. This test is intended to diagnose the following:

Wiring Harness Circuits (MAP SIG, SIG RTN & VREF)
Faulty TMAP Sensor
Faulty Powertrain Control Module (PCM)

VREF voltage should be 4-6 volts. BARO PID reading is in frequency/volts.

Fig 1: Identifying TMAP Sensor Harness Connector Terminals (Ranger 2.3L 4V)

Courtesy of FORD MOTOR CO.

Fig 2: Testing TMAP Sensor (Ranger 2.3L 4V)

Courtesy of FORD MOTOR CO.