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Home >> Mazda >> 2006 >> B4000 Base, Automatic >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Symptom Troubleshooting [Automatic Transmission] >> Digital Transmission Range (Tr) Sensor

Digital Transmission Range (Tr) Sensor

DIAGNOSTIC TROUBLE CODE CHART

DTC P0705, P0708, P1702, P1704, PI705 DIGITAL TRANSMISSION RANGE (TR) SENSOR
DETECTION CONDITION
  • P0705 indicates digital TR circuit failure.
  • P0708 indicates digital TR sensor circuit TR3A open.
  • P1702 indicates digital TR signal intermittent (P0705 and P0708 are set).
  • P1704 indicates digital TR circuits reading in-between gear positions during KOEO/KOEO.
  • P1705 indicates digital TR not in PARK or NEUTRAL during KOEO/KOER.
POSSIBLE CAUSE
  • Short to ground (P0705, P1702).
  • Open in TR4, TR3A, TR2, and/or TR1 circuits (P0705, P1702).
  • Open circuit (P0708, P1702)
  • Digital TR sensor or shift cable improperly adjusted (P1704).
  • Digital TR circuit failure (P1704, P1705).
  • KOEO/KOER not run in PARK or NEUTRAL (P1705).
  • Damaged PCM.
HINT TR sensor description 
  • Completes the start circuit in Park and Neutral, the back-up lamp circuit in reverse and the neutral sense circuit (4WD only) in Neutral.
  • Opens and closes a set of four switches that are monitored by the PCM to determine the position of the manual lever (P, R, N, D, 2, 1).
PROBLEM SYMPTOM CHART

DTC P0705, P0708, P1702, P1704, P1705 DIGITAL TRANSMISSION RANGE (TR) AND SENSOR
STEP INSPECTION ACTION
1 Was PCM Quick Test performed? Yes If only DTCs P0705 and P0708 are set, go to step 4.
Otherwise, go to step 2.
No Perform PCM Quick Test. See PCM QUICK TEST , .
2 VERIFY DIGITAL TRANSMISSION RANGE SENSOR ALIGNMENT
  • Check to make sure the digital TR sensor harness connector is fully seated, terminals are fully engaged in connector and in good condition before proceeding.
  • Apply the parking brake.
  • Transmission in Neutral (N) position.
  • Disconnect the shift cable/linkage from the manual lever.
  • See AUTOMATIC TRANSMISSION REMOVAL / INSTALLATION , .
  • Is the digital TR sensor properly adjusted? 
 Yes Go to step 3.
No Adjust the digital TR sensor.
See DIGITAL TRANSMISSION RANGE SENSOR REMOVAL / INSTALLATION , .
Go to step 11.
3 VERIFY SHIFT CABLE/LINKAGE ADJUSTMENT
  • Place the manual lever in the overdrive position.
  • Re-connect the shift cable/linkage.
  • Verify that the shift cable/linkage is properly adjusted.
  • Is the shift cable/linkage properly adjusted? 
 Yes Go to step 4.
No Adjust the shift cable/linkage.
See SHIFT CABLE AND BRACKET ADJUSTMENT , . Go to step 4.
4 CHECK ELECTRICAL SIGNAL OPERATION
  • Transmission in Park (P) position.
  • Disconnect digital TR sensor.
    CAUTION:
    • Do not pry on the connector. This will damage the connector and result in a transmission concern. Press button and pull out harness connector.
  • Inspect both ends of the connector for damage or pushed out pins, corrosion, loose wires and missing or damaged seals.
  • Is there damage to the connector, pins or harness? 
 Yes Repair as required.
Go to step 11.
No If diagnosing a DTC, go to step 5.
If diagnosing a starting concern, a backup lamp concern, or 4WD low engagement concern, go to step 10.
5 CHECK ELECTRICAL SYSTEM OPERATION (DIGITAL TR AND PCM)
  • Reconnect digital TR sensor.
  • Key ON, Engine OFF (KOEO).
  • Access TR and TR_V PIDs on WDS or equivalent tester.
  • Move transmission range selector lever into each gear and stop.
  • Observe the PIDs, TR and TR_V, while wiggling harness and tapping on sensor.
  • Compare the PIDs with the chart.
  • Do the PIDs TR and TR_V match the chart below and does the TR_V PID remain steady when the harness is wiggled or when the sensor is tapped upon? 
 Yes The problem is not in the digital TR sensor system.
See SYMPTOM TROUBLESHOOTING CHART - AUTOMATIC TRANSMISSION , .
NOTE:
  • Align the drive shaft with the marks made during removal to ensure correct balance.
No If digital TR_V changes when wiggling harness or tapping on the sensor, problem may be intermittent.
Go to step 6.
6 CHECK DIGITAL TRANSMISSION RANGE SENSOR OPERATION
  • Disconnect digital TR sensor connector.
  • Install transmission tester 49 UN01 071 and digital TR cable and overlay 49 UN01 154.
  • Perform Sensor Test as instructed on the digital TR overlay.
  • Does the status lamp on the tester TR-E cable match the selected gear positions? 
 Yes Concern is not in the digital TR sensor.
Go to step 7.
No Replace digital TR sensor and adjust as outlined.
See DIGITAL TRANSMISSION RANGE SENSOR REMOVAL / INSTALLATION , .
Go to step 11.
7 CHECK PCM HARNESS CIRCUITS FOR OPENS
  • Key OFF.
  • Disconnect PCM. Inspect for damaged or pushed out pins, corrosion or loose wires.
  • Install breakout box, leave PCM disconnected.
  • Measure the resistance between the following PCM test pins and the digital TR sensor connector:
    • test pin 91 and SIG RTN (pin 2).
    • test pin 3 and TR1 (pin 4).
    • test pin 49 and TR2 (pin 5).
    • test pin 50 and TR4 (pin 6).
    • test pin 64 and TR3A (pin 3).
  • Are all resistances less than 5 ohms? 
 Yes Go to step 8.
No Repair open circuit(s).
Go to step 11.
8 CHECK PCM HARNESS CIRCUITS FOR SHORT TO GROUND OR POWER
  • Measure the resistance between PCM test pin 91 and PCM test pins 71 and 97.
  • Measure the resistance between PCM test pins 71, 97, 51, 76, 77, 103 and 109 at the following PCM test pins:
    • test pin 3.
    • test pin 49.
    • test pin 50.
    • test pin 64.
  • Are all resistances greater than 10K ohms? 
 Yes Go to step 9.
No Repair short circuit(s).
Go to step 11.
9 CHECK FOR SHORT BETWEEN TR/PCM INPUT SIGNAL CIRCUITS
  • Measure resistance between the following PCM test pins:
    • pin 3 and pins 49, 50 and 64.
    • pin 49 and pins 50 and 64.
    • pin 50 and 64.
  • Are all resistances more than 10K ohms? 
 Yes Replace PCM.
See POWERTRAIN CONTROL MODULE (PCM) REMOVAL / INSTALLATION , .
Go to step 11.
No Repair shorts on circuits having less than 10K ohms between other TR/PCM input signal circuits.
Go to step 11.
10 CHECK THE NON-PCM INTERNAL CIRCUITS OF SENSOR
  • Install transmission tester 49 UN01 071 and digital TR cable and overlay 49 UN01 154.
  • Perform Switch Test as instructed on the digital TR overlay.
  • Does the status lamp on the tester indicate RED for the correct gear position? 
 Yes Concern is not in the digital TR sensor.
For starting system concerns, See STARTING CONCERNS , .
For backup lamp concerns, See SYMPTOM TROUBLESHOOTING CHART - REVERSING LAMPS , .
For Optional Circuits: 4WD Low Neutral Sense, See TRANSFER CASE RANGE MALFUNCTION - 4WD LOW (4X4L) , .
No Replace digital TR sensor and adjust as outlined.
See DIGITAL TRANSMISSION RANGE SENSOR REMOVAL / INSTALLATION , .
Go to step 11.
11 VERIFY TROUBLESHOOTING OF DTCs COMPLETED
  • Make sure to reconnect all disconnected connectors.
  • Clear DTCs from PCM memory using WDS or equivalent tester generic OBD-II function.
  • Perform PCM Quick Test.
  • Is same DTC present? 
 Yes Replace PCM and repeat PCM Quick Test.
No If any other DTC is present, go to applicable DTC inspection.
If no DTC is present, troubleshooting complete.
SELECTOR POSITION CHART

Selector Position PID TR PID TR_V
Park P/N 0000
Reverse REV 1100
Neutral NTRL 0110
Drive O/D** (or_DRIVE_) 1111
Man 2 MAN 2 1001
Man 1 MAN 1 0011
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