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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 P0707: Tr Switch Circuit Shorted Or DTC P0708: Tr Switch Circuit Open >> 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 TR switch connector. Inspect connector for damaged pins, corrosion and loose wires. Repair as necessary. Reconnect TR switch connector. Verify shift linkage adjustment. Ensure TR switch is correctly adjusted. See appropriate SERVICING article. Adjust as needed and go to step  6. If sensor is correctly adjusted, go to next step.
  2. Install TR switch overlay on transmission tester. See Fig 1. Connect tester to TR switch. Check continuity and resistances in all positions. See TR SWITCH RESISTANCE SPECIFICATIONS  table. If TR switch does not operate within specification, replace sensor, and go to step  6. If sensor operates within specification, go to next step.
  3. Disconnect TR switch harness connector. Turn ignition on. Measure voltage between ground and terminal "D" (Green wire) on TR switch harness connector. If battery voltage is present, go to next step. If battery voltage is not present, repair open in Green wire. After repairs, go to step  6.
  4. Turn ignition off. Disconnect 104-pin PCM harness connector. PCM is located behind center console. Inspect connector for damaged pins, corrosion and loose wires. Repair as necessary. Install breakout box, leaving PCM disconnected. Measure and record resistance between breakout box test pin No. 64 and test pins No. 71 and 97. Measure and record resistance between breakout box test pin No. 64 and ground. If each measurement is more than 10 k/ohms, go to next step. If any measurement is less than 10 k/ohms, repair short circuit. After repairs, go to step  6.
  5. Measure and record resistance between breakout box test pin No. 91 and TR switch harness connector terminal "B". Measure and record resistance between breakout box test pin No. 64 and TR switch harness connector terminal "D". See TR SWITCH WIRE COLOR IDENTIFICATION  table. If each resistance measurement is less than 5 ohms, go to next step. If any resistance measurement is more than 5 ohms, repair open 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. Disconnect breakout box and transmission tester. Connect all components. 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 DTC P0707 or P0708 is still present, replace PCM. See POWERTRAIN CONTROL MODULE  under REMOVAL & INSTALLATION. If DTC P0707 or P0708 is not present but symptoms still exist, go to TROUBLE SHOOTING .
TR SWITCH RESISTANCE SPECIFICATIONS

Gearshift Lever Position Ohms (Minimum) Ohms (Maximum) Voltage Range
"P" 3770 4607 3.97-4.85
"R" 1304 1593 3.24-3.96
"N" 660 807 2.55-3.11
"D" 361 442 1.88-2.30
"2" 190 232 1.23-1.51
"1" 78 95 .061-.075
Fig 1: Identifying TR Switch "E" Cable & Transmission Tester Digital TR Switch Overlay
G98G01936Courtesy of FORD MOTOR CO.
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