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1997 SVX

  1. Turn ignition switch to OFF position. Disconnect connector from TCM and connector from transmission and dropping resistor. Measure resistance between TCM connector B68 and transmission connector. Resistance between terminal No. 8 of connector B68 and terminal No. 7 of transmission connector should be 0-1 ohm. See Figure. If resistance is okay, go to next step. If resistance is not within specification, repair open in harness between TCM and transmission connector.
  2. Measure resistance between TCM connector B68 and ground. Resistance between terminal No. 8 of connector B68 and ground should be more than 100 k/ohms. If resistance is okay, go to next step. If resistance is not within specification, repair short to ground between TCM and transmission connector.
  3. Measure resistance between TCM connector B68 and dropping resistor connector. Resistance between terminal No. 7 of connector B68 and terminal No. 1 of resistor connector should be 0-1 ohm. If resistance is okay, go to next step. If resistance is not within specification, repair open in harness between TCM and dropping resistor.
  4. Measure resistance between TCM connector B68 and ground. Resistance between terminal No. 7 of connector B68 and ground should be more than 100 k/ohms. If resistance is okay, go to next step. If resistance is not within specification, repair short to ground in harness between TCM and dropping resistor.
  5. Measure resistance between transmission connector receptacle and ground. See Figure. Resistance between terminal No. 4 of transmission connector receptacle and ground should be 0-1 ohm. If resistance is okay, go to next step. If resistance is not within specification, repair open in internal transmission harness between receptacle and duty solenoid "A".
  6. With resistor disconnected, measure resistance between resistor terminals No. 1 and No. 2. Resistance should be 9-15 ohms. If resistance is okay, go to next step. If resistance is not within specification, replace dropping resistor.
  7. With transmission connector disconnected, measure resistance between transmission connector receptacle terminals. Resistance between receptacle terminals No. 7 and No. 4 should be 1.5-4.5 ohms. If resistance is okay, go to next step. If resistance is not within specification, replace duty solenoid "A".
  8. Warm engine and transmission to operating temperature. With KOEO, move shift selector to "N" position. Backprobe and measure voltage between TCM connector B68 and ground. Voltage between connector B68 terminals No. 8 and No. 10 with throttle fully closed should be 1.5-4.0 volts. If voltage is okay, go to next step. If voltage is not within specification, replace TCM and retest.
  9. Backprobe and measure voltage between TCM connector B68 and ground. Voltage between connector B68 terminals No. 8 and No. 10 with throttle fully open (WOT) should be 0-1 volt. If voltage is okay, go to next step. If voltage is not within specification, replace TCM and retest.
  10. Measure voltage between connector B68 terminals No. 7 and No. 10 . Voltage should be 5-14 volts with throttle fully closed. If voltage is okay, go to next step. If voltage is not within specification, replace TCM and retest.
  11. Measure voltage between connector B68 terminals No. 7 and No. 10. Voltage should be 0-1 volt with throttle fully open (WOT). If voltage is okay, inspect contacts in connector to TCM, transmission and dropping resistor. If voltage is not within specification, replace TCM and retest.
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