Ford F-150 2002 - Shift Solenoid Diagnosis; Pre-Diagnosis and Operation Charts

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Will read DRIVE if O/D is canceled.

A. TR_V is the voltage at the PCM pin 64 (TR3A Circuit) to signal return.

B. "In Between" reading could be caused by a shift cable or digital TR sensor misaligned or a digital TR sensor circuit failure of TR1, TR2, TR3A, or TR4.

C. TR_D: 1= Open digital TR switch, 0= Closed digital TR switch.

D. EEC-V Control System Breakout Box Readings: Taken from PCM signal pins for TR1, TR2, TR3A, TR4 to signal return.

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Voltages for TR1, TR2, TR4:

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0 = 0.0 volts.

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1 = 9.0 - 14.0 volts.

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Voltage for TR3A:

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0 = 0.0 volts.

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1 = 1.3 - 1.8 volts.

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1.8 - 5.0 volts = Invalid Reading (open in wires or bad resistor in digital TR sensor).

Wiggle Test Information for Open/Shorts

A. TR4, TR3A, TR2, and TR1 are all closed in PARK. PARK is a good position to check for intermittent open circuits (with scan tool monitoring TR_D).

B. TR4, TR3A, TR2, and TR1 are all open in OVERDRIVE, so OVERDRIVE is a good position to check for shorts to ground. To determine the shorted components

while observing TR_D, unplug the TR and see if the short goes away. If the short is still present, unplug the transaxle harness and see if the short goes away. If

the short is still present, then the short is in the PCM or vehicle harness. Remove the suspect circuit(s) wire terminal from the PCM connector. If the short is still

present, then the PCM has an internal failure, otherwise the failure is in the vehicle harness.

Pinpoint Tests

Any time an electrical connector or solenoid body is disconnected, inspect the connector for terminal condition, corrosion and contamination. Also inspect the connector

seal for damage. Clean, repair or replace as required.

Shift Solenoids Pre-Diagnosis

Use the following shift solenoid operation information when carrying out Pinpoint Test A.

Solenoid Operation Chart

Powertrain control module-controlled.

Shift Solenoid Failure Mode Chart "Always Off"

Failed off due to powertrain control module (PCM) or vehicle wiring concerns, electrically or hydraulically stuck off.

PARK P/N 0 0 0 0 0.0 Volts

In Between REV 0 1 0 0 1.3 - 1.8 Volts

REVERSE REV 1 1 0 0 1.3 - 1.8 Volts

In Between REV 0 1 0 0 1.3 - 1.8 Volts

NEUTRAL NTRL 0 1 1 0 1.3 - 1.8 Volts