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Home >> Suzuki >> 1995 >> Sidekick JS, 2D Utility, Standard >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Diagnosis - Aw03-72LE >> Symptom Trouble Shooting >> Incorrect Shift Speeds
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Incorrect Shift Speeds

  1. Ensure engine and transmission are at normal operating temperature. Retrieve trouble codes. See RETRIEVING TROUBLE CODES . If a trouble code is present, repair as needed. Clear trouble codes. See CLEARING TROUBLE CODES . If no trouble codes are present, go to next step.
  2. Access TCM harness connector (leave connected). See Figure. Using a DVOM, measure voltage (backprobe) between chassis ground and TCM harness connector terminal TH. See Figure. Go to next step.
  3. Slowly depress accelerator pedal to Wide Open Throttle (WOT). Monitor voltage while depressing throttle pedal. Voltage should decrease as throttle is depressed. Voltage should be within the following range: battery voltage multiplied by .95 (idle position) to battery voltage multiplied by .39 (WOT). Go to next step.
  4. If voltage is not within range in step  3, or changes erratically, inspect Throttle Position (TP) sensor. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. If voltage is within range, turn ignition off and go to next step.
  5. Disconnect TCM harness connector. Disconnect speedometer cable from transmission. Using a DVOM, measure resistance between chassis ground and TCM harness connector terminal SPM. See Figure. Monitor DVOM while turning speedometer cable. Go to next step.
  6. If reading pulses between zero ohms and infinity 4 times per revolution, go to next step. If reading is not as specified, inspect for a broken speedometer cable, faulty sensor in speedometer or faulty circuit between speedometer and TCM.
  7. Ensure ignition is off. Reconnect TCM harness connector. Turn ignition on. Using a DVOM, measure voltage (backprobe) between chassis ground and TCM harness connector terminal PWR. See Figure. If reading is 5 volts with shift selector in "N" position, and zero volts in "P" position, replace TCM and retest. If readings are not as specified, replace PNP switch and retest. If problem is still present, inspect and repair circuits between PNP switch and TCM.
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