LEMON Manuals: Even more car manuals for everyone
Home >> Mercury >> 2008 >> Milan Base, 2.3 Z, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Automatic Transaxle/Transmission - AISIN Aw21) >> Diagnostic Tests >> Pinpoint Tests - Non OSC Equipped Vehicle >> Pinpoint Tests >> PINPOINT TEST D: Turbine Shaft Speed (TSS) SENSOR

PINPOINT TEST D: Turbine Shaft Speed (TSS) SENSOR

WARNING: This page is about a different variant/trim than selected.
  1. D1 ELECTRONIC DIAGNOSTICS 
    • Check to make sure the Transmission Control Module (TCM) connector is fully seated, pins are fully engaged in connector and in good condition before proceeding.
    • Connect the diagnostic tool.
    • Key in ON position.
    • Monitor the PID for the Turbine Shaft Speed (TSS) sensor.
    • Monitor and record speed.
    • Does the TSS match the engine rpm? 
    1. YES  : CLEAR all DTCs. ROAD TEST to verify concern is not present. Concern could be intermittent. If concern is still present or reappears, go to  D2 .
    2. NO  : Go to  D2.
  2. D2 CHECK TSS SENSOR RESISTANCE 
    • Remove the TCM.
      • Fig 1: Checking TSS Sensor Resistance
      GF0017765Courtesy of FORD MOTOR CO.
    • Measure the resistance at the transaxle bulkhead electrical connector between pin 12 and 13.
    • Is the resistance less than 5 ohms? 
    1. YES  : CLEAR all DTCs. ROAD TEST to verify concern is not present. Concern could be intermittent. If concern is still present or reappears, go to  D3 .
    2. NO  : Go to  D4.
  3. D3 CHECK TSS SENSOR CIRCUIT FOR SHORT TO GROUND 
    • Remove the TCM.
      • Fig 2: Measuring Resistance At Transaxle Bulkhead Electrical Connector Between Pin 12 & Ground
      GF0017766Courtesy of FORD MOTOR CO.
    • Measure the resistance at the transaxle bulkhead electrical connector between pin 12 and ground.
      • Fig 3: Measuring Resistance At Transaxle Bulkhead Electrical Connector Between Pin 13 & Ground
      GF0017767Courtesy of FORD MOTOR CO.
    • Measure the resistance at the transaxle bulkhead electrical connector between pin 13 and ground.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : INSTALL a new TCM and REFLASH to the latest level calibration. CLEAR all DTCs. ROAD TEST to verify concern is not present. Concern could be intermittent. If concern is still present or reappears, go to  D4 .
    2. NO  : Go to  D4.
  4. D4 ELECTRONIC DIAGNOSTICS 
    • Remove the transaxle side cover.
    • Measure the resistance at the TSS sensor electrical connector between pin 1 and 2.
    • Is the resistance less than 5 ohms? 
    1. YES  : CLEAR all DTCs. ROAD TEST to verify concern is not present. Concern could be intermittent. If concern is still present or reappears, INSTALL a new internal harness.
    2. NO  : The sensor is defective, INSTALL a new TSS sensor.
scientia non olet · About LEMON Manuals