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Possible Causes Lincoln Aviator I

Automatic Transaxle/transmission 22 illustrations ~413 words

Possible Causes

If the transmission will not shift correctly, it may be caused by

  1. Short to ground
  2. Wiring, terminals or connectors
  3. Short to open
  4. Faulty solenoids
  5. Other non-electrical transmission hardware systems
  6. Faulty PCM

Note. Refer to the TRANSMISSION VEHICLE HARNESS connector illustration preceding these pinpoint tests.

Note. Refer to TRANSMISSION for wiring diagrams and TRANSMISSION CONNECTOR LAYOUTS for connector and pin identification.

Note. Read and record all DTCs. All Digital TR Sensor and VSS DTCs must be repaired before entering Output State Control (OSC).

Scheme 439

Scheme 439: Test Procedure
Scheme 439: Test Procedure

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Scheme 440

Scheme 441

Scheme 441
Scheme 441

If the transmission fluid temperature sensor fails it may cause the TCIL light to flash, some possible causes could be

  1. Short to ground
  2. Wiring, terminals or connectors
  3. Open circuit
  4. Faulty temperature sensor
  5. Sensor out of range
  6. Sensor never changes
  7. Faulty PCM

Note. Refer to the TRANSMISSION VEHICLE HARNESS connector illustration preceding these pinpoint tests.

Scheme 442

Scheme 442: Test Procedure
Scheme 442: Test Procedure

Scheme 443

Scheme 443
Scheme 443

If the vehicle will not start in PARK or NEUTRAL, it could be caused by the following

  1. Short to ground
  2. Wiring, terminals or connectors
  3. Open circuit
  4. Faulty digital transmission range (TR) sensor
  5. Faulty PCM

Note. Refer to the Digital Transmission Range (TR) Sensor Connector illustration and Digital Transmission Range TR) Sensor Diagnosis Chart preceding these pinpoint tests.

Scheme 444

Scheme 444: Test Procedure
Scheme 444: Test Procedure

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Scheme 446

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Scheme 447

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Scheme 448

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Scheme 449
Scheme 449

If the transmission will not shift correctly, it may be caused by

  1. Short to ground
  2. Wiring, terminals or connectors
  3. Open circuit
  4. Faulty pressure control solenoids
  5. Faulty PCM

Note. Refer to the TRANSMISSION VEHICLE HARNESS connector illustration preceding these pinpoint tests.

Note. Read and record all DTCs. All digital TR Sensor and VSS DTCs must be repaired before entering Output State Control (OSC).

Scheme 450

Scheme 450: Test Procedure
Scheme 450: Test Procedure

Scheme 451

Scheme 451
Scheme 451

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Scheme 452

If the transmission will not shift correctly it may be caused by

  1. Short to ground
  2. Wiring, terminals or connectors
  3. Short to open
  4. Faulty sensors
  5. Internal transmission component failure

Note. Refer to the TURBINE SHAFT SPEED (TSS) SENSOR Inspecting , INTERMEDIATE SHAFT SPEED SENSOR HARNESS CONNECTOR , and OUTPUT SHAFT SPEED (OSS) SENSOR connector illustrations preceding these pinpoint tests.

Scheme 453

Scheme 453: Test Procedure
Scheme 453: Test Procedure

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Scheme 454

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Scheme 456

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Scheme 457
Scheme 457

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Scheme 458
Scheme 458

If the transmission will not shift correctly, it may be caused by

  1. Faulty mechanical portion solenoids
  2. Faulty PCM

Note. Repair all other DTCs before repairing the following DTCs: P1714, P1715, P1716, P1717, P1740.

Scheme 459

Scheme 459: Test Procedure
Scheme 459: Test Procedure

Scheme 460

Scheme 460: Special Tool(s)
Scheme 460: Special Tool(s)

The special tests are designed to aid the technician in diagnosing the hydraulic and mechanical portion of the transmission.