Test Dm: Thermal Manifold Absolute Pressure Sensor: Testing

WARNING: This page does not describe the selected car, but rather 25 other vehicles, including the 2002 Lincoln Town Car, 2002 Lincoln Navigator, 2002 Lincoln LS, 2002 Lincoln Continental, and 2002 Lincoln Blackwood. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: For additional testing information, see DIAGNOSTIC AIDS .

1) KOEO & KOER DTC P0107 Or P0108: Check MAP PID
DTC P0107 indicates TMAP sensor reference voltage fell below calibrated limit of .25 volt. DTC P0108 indicates TMAP sensor reference voltage exceeded calibrated limit of 5 volts. Possible causes for these faults are:
- VREF Circuit Open, Shorted To Ground Or VPWR
- TMAP Signal Shorted To VPWR
- Faulty TMAP Sensor
- Faulty PCM
Turn ignition switch to OFF position. Disconnect TMAP sensor connector. Using a DVOM, measure voltage between SIG RTN and VREF circuits at TMAP harness connector. See Figure. If voltage measurement is 4-6 volts, go to next step. If voltage measurement is not 4-6 volts, go to TEST C, step 1).

2) Check TMAP Sensor Operation

Connect 2 jumper wires to complete VREF and SIG RTN circuits between TMAP sensor harness connector and TMAP sensor connector. See Figure. Start engine and allow to idle. Using a DVOM, measure voltage on MAP circuit between MAP sensor connector and chassis ground. Observe voltage while rapidly increasing engine speed to 3000 RPM by depressing accelerator pedal and then releasing. If voltage rapidly increases to about 4 volts and then decreases to about 0.7 volt, go to next step. If voltage does not rapidly increase to about 4 volts and then decrease to about 0.7 volt, replace TMAP sensor.

3) Check TMAP Circuit For Short To VREF & SIG RTN In Harness

Turn ignition switch to OFF position. Disconnect PCM connector. Using a DVOM, measure resistance between TMAP circuit and both VREF and SIG RTN circuits at TMAP sensor harness connector. See Figure If each resistance is more than 10 k/ohms, go to next step. If either resistance is 10 k/ohms or less, repair short between circuits.

4) Check TMAP Sensor Circuit For Open In Harness

Ensure ignition switch is in OFF position and PCM is disconnected. Using a DVOM, measure resistance of MAP circuit between PCM harness connector and TMAP sensor harness connector. If resistance is less than 5 ohms, replace PCM. If resistance is 5 ohms or more, repair open in TMAP circuit.
NOTE: A break in step numbering sequence occurs at this point. Procedure skips from step 4) to step 6). No test procedures have been omitted.

NOTE: For additional testing information, see DIAGNOSTIC AIDS .

6) Continuous Memory DTC P0107 & P0108: Check For Intermittent Circuits To TMAP Sensor
Turn ignition switch to OFF position. Connect scan tool to Data Link Connector (DLC). Turn ignition switch to ON position. Using scan tool, access MAP V PID from PID/DATA MONITOR & RECORD menu. Observe MAP V PID voltage for indication of fault while shaking and bending MAP sensor wiring harness and connector. Tap lightly on MAP sensor to simulate road shock. An indication of fault is a sudden change in MAP V PID voltage. If a fault is indicated, isolate and repair as necessary. If no fault is indicated, fault is unable to be duplicated at this time. Go to TEST Z, step 1) .