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Home >> Mazda >> 2002 >> Tribute LX, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 38 (Automatic Transmission - Diagnosis [La4A-El]) >> Diagnostic Tests >> DTC P0713: TFT Sensor Circuit Open Or DTC P1718: TFT Sensor Circuit High Temperature Input >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2002 Mazda 626 and 2001 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect transaxle harness connector. Inspect condition of connector, and repair as needed. Connect transmission tester. Set Bench/Drive switch to BENCH mode. Rotate selector switch to OHMS position. Measure resistance between TFT sensor jacks on tester. Confirm measurements correspond to values shown in appropriate TFT SENSOR TEMPERATURE/RESISTANCE SPECIFICATIONS table. If measurements are not within specifications, replace solenoid body assembly. After repairs, go to step  6. If measurements are within specifications, go to next step.
  2. Turn ignition on. Measure voltage between ground and terminals No. 3, 6 and 9 on transaxle harness connector. See Figure. If battery voltage is present on all terminals, go to next step. If battery voltage is not present on any specified terminal, repair open circuit, then go to step  6.
  3. Turn ignition off. Disconnect PCM harness connector. PCM is located behind center console. Inspect connector for damaged pins, corrosion and loose wires. Install breakout box and leave PCM disconnected. Check for continuity between breakout box pins No. 37 and 71. If continuity does not exist, go to next step. If continuity exists, repair short between TFT sensor signal circuit and power supply circuit. See WIRING DIAGRAMS . After repairs, go to step  6.
  4. Check for continuity between ground and pin No. 37 at breakout box. If continuity is present, repair circuit for short to ground. After repairs, go to step  6. If continuity is not present, go to next step.
  5. Measure resistance between terminal No. 1 at transaxle harness connector and pin No. 37 at breakout box. See Figure. If resistance is less than 5 ohms, go to next step. If resistance is greater than 5 ohms, repair open in TFT SIG sensor signal harness circuit. After repairs, go to next step.
    6. CAUTION: On vehicles equipped with immobilizer system, reprogram ignition key identification numbers after PCM replacement. See PROGRAMMING .
  6. Connect all components. Disconnect transmission tester and breakout box. Erase all DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. Record continuous memory DTCs and freeze frame data. Perform KOEO and KOER self-tests. See RETRIEVING DIAGNOSTIC TROUBLE CODES (QUICK TEST)  under SELF-DIAGNOSTIC SYSTEM. If DTCs are still present, replace PCM. See POWERTRAIN CONTROL MODULE  under REMOVAL & INSTALLATION. If DTC P0713 or P1718 is not present but symptoms still exist, see TROUBLE SHOOTING .
TFT SENSOR TEMPERATURE/RESISTANCE SPECIFICATIONS (2001 MODELS)

Temperature °F (°C) k/ohms
-40 To -4 (-40 To -20) 242-1134
-3 To 31 (-19 To -1) 84-242
32-68 (0-20) 41-84
69-104 (21-40) 14-41
105-158 (41-70) 5.9-14
159-194 (71-90) 3.1-5.9
195-230 (91-110) 1.7-3.1
231-266 (111-130) 1.0-1.7
267-302 (131-150) .6-1.0
TFT SENSOR TEMPERATURE/RESISTANCE SPECIFICATIONS (2002 MODELS)

Temperature °F (°C) k/ohms
-40 To -4 (-40 To -20) 284-967
-3 To 31 (-19 To -1) 100-284
32-68 (0-20) 37-100
69-104 (21-40) 16-37
105-158 (41-70) 5-16
159-194 (71-90) 2.7-5.0
195-230 (91-110) 1.5-2.7
231-266 (111-130) .8-1.5
267-302 (131-150) .54-.8
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