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Test D: Digital Transmission Range Sensor

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NOTE: After each service or repair procedure has been completed, reconnect all components. Clear DTCs and repeat QUICK TEST. See RETRIEVING DIAGNOSTIC TROUBLE CODES (QUICK TEST)  under SELF-DIAGNOSTIC SYSTEM. Ensure all EEC-IV systems are working properly and DTCs are no longer present.
  1. Turn ignition switch to OFF position. Place gearshift lever in "P" position. Ensure Transmission Range (TR) sensor connector is fully seated, terminals are fully engaged in connector and in good condition. Repair as necessary. Apply parking brake. Place gearshift lever in "N" position. Disconnect shift cable/linkage from manual lever. Verify digital TR sensor alignment tool fits in appropriate slots. If TR sensor is correctly adjusted, go to next step. If sensor requires adjustment, adjust as necessary. See appropriate AUTOMATIC article in TRANSMISSION SERVICING. After adjustment, clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. Repeat RETRIEVING DIAGNOSTIC TROUBLE CODES (QUICK TEST)  under SELF-DIAGNOSTIC SYSTEM.
  2. Place transmission manual lever in "D" position. Reconnect shift cable/linkage from manual lever. Adjust shift cable/linkage as necessary and go to next step.
  3. Place gearshift lever in "P" position. Disconnect TR sensor harness connector. Inspect both ends of connector for damage or pushed out terminals, corrosion, loose wires and missing or damaged seals. If connector is okay and you are directed here to diagnose a DTC, go to next step. If diagnosing a starting problem, back-up lights condition or engagement condition, go to step  9. If connector needs repair, repair as necessary and clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. Repeat RETRIEVING DIAGNOSTIC TROUBLE CODES (QUICK TEST)  under SELF-DIAGNOSTIC SYSTEM.
  4. Turn ignition switch to OFF position. Connect NGS tester to DLC. Reconnect TR sensor connector. Turn ignition switch to ON position. Select TR PIDs TR and TR_D on NGS tester. While moving gearshift lever to each position, wiggle TR sensor wiring harness connector and tap on TR sensor lightly, while observing NGS tester display. See Fig 1. If PID values do not match during wiggle or tap tests, go to next step. If PID values match during wiggle or tap tests, TR sensor is okay. Diagnose problem by symptom. See appropriate SYMPTOM DIAGNOSIS under TROUBLE SHOOTING .
    Fig 1: Digital TR Sensor PID Output Specifications
    G99F54846Courtesy of FORD MOTOR CO.
  5. Disconnect TR sensor harness connector. Connect TR "E" cable and transmission tester to TR sensor. See Fig 2. Install TR Sensor overlay onto the tester. Perform TR sensor test as instructed on overlay. If TR "E" cable status lights match each selected gear position, TR sensor is okay. Go to next step. If TR "E" cable status lights do not match each selected gear position, replace and adjust TR sensor. See appropriate AUTOMATIC article in TRANSMISSION SERVICING for adjustments. Clear DTCs. Repeat RETRIEVING DIAGNOSTIC TROUBLE CODES (QUICK TEST)  under SELF-DIAGNOSTIC SYSTEM.
  6. Turn ignition switch to OFF position. Ensure TR sensor is disconnected. Disconnect PCM 104-pin harness connector, and inspect it for damaged terminals, corrosion and loose wires. Repair as necessary. Install breakout box, leaving PCM disconnected. Measure and record resistance between breakout box terminal No. 91 and TR sensor harness connector terminal No. 2. Measure and record resistance between breakout box terminal No. 17 or 34 (TR1) and TR sensor harness connector terminal No. 4. Measure and record resistance between breakout box terminal No. 49 and TR sensor harness connector terminal No. 5. Measure and record resistance between breakout box terminal No. 50 and TR sensor harness connector terminal No. 6. Measure and record resistance between breakout box terminal No. 64 and TR sensor harness connector terminal No. 3. See Figure. If each resistance reading is less than 5 ohms, go to next step. If any resistance reading is 5 ohms or more, repair open circuit. Remove breakout box and connect all components. Erase all DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. Repeat RETRIEVING DIAGNOSTIC TROUBLE CODES (QUICK TEST)  under SELF-DIAGNOSTIC SYSTEM.
  7. Ensure TR sensor harness connector is disconnected. Measure resistance between specified breakout box terminal. See TR SENSOR/PCM CIRCUIT CHECK  table. If each measurement is more than 10 k/ohms, go to next step. If any measurement is 10 k/ohms or less, repair short circuit(s). Remove breakout box and connect all components. Erase all DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. Repeat RETRIEVING DIAGNOSTIC TROUBLE CODES (QUICK TEST)  under SELF-DIAGNOSTIC SYSTEM.
    TR SENSOR/PCM CIRCUIT CHECK

    Application Measure Between BOB Terminals No.
    Short To Power 71, 97 & 17 (Or 34), 49, 50, 64, 91
    Short To Ground 17 (Or 34), 49, 50, 64 & 51, 76, 77, 91, 103
  8. Measure and record resistance between breakout box terminal No. 17 (or 34) and breakout box terminals No. 49, 50 and 64. Measure and record resistance between breakout box terminal No. 49 and breakout box terminals No. 17 (or 34), 50, and 64. Measure and record resistance between breakout box terminals No. 50 and breakout box terminals No. 17 (or 34), 49, and 64. Measure and record resistance between breakout box terminal No. 64 and breakout box terminals No. 17 (or 34), 49, and 50. If each resistance reading is more than 10 k/ohms, replace PCM. Reconnect all connectors and clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. Repeat RETRIEVING DIAGNOSTIC TROUBLE CODES (QUICK TEST)  under SELF-DIAGNOSTIC SYSTEM. If any resistance reading is 10 k/ohms or less, repair short circuit(s). Reconnect all connectors, clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. Repeat RETRIEVING DIAGNOSTIC TROUBLE CODES (QUICK TEST)  under SELF-DIAGNOSTIC SYSTEM.
  9. Connect TR "E" cable marked DIGITAL and transmission tester to TR sensor. See Fig 2. Install DIGITAL TR Sensor Overlay onto transmission tester. Perform switch test as instructed on DIGITAL TR sensor overlay. If transmission tester status light does not turn Red, replace and adjust TR sensor. If transmission tester status light turns Red, TR sensor is okay. For back-up lights concerns, see BACK-UP LIGHTS article in ACCESSORIES & EQUIPMENT. For 4WD Low condition, see TEST TG: 4WD LOW (4X4L) RANGE . For neutral-sense and starting concerns, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
Fig 2: Identifying TR Sensor "E" Cable & Transmission Tester Digital TR Sensor Overlay
G98G01936Courtesy of FORD MOTOR CO.
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