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DTC 32: Throttle Opening Signal: Notes

NOTE: DTC 32 will set if signal voltage is low (opening high).
  1. Turn ignition on. Using a DVOM, measure voltage (backprobe) between ground and TCM harness connector terminal B8 (Orange wire). Reading should be 4.4-6.2 volts with throttle opening at 48 percent, and increase smoothly to 9.4-13.2 volts as throttle opening is increased to 95 percent. If reading is as specified, check for an intermittent problem or faulty TCM. See DIAGNOSTIC AIDS . If reading is not as specified, go to next step.
  2. Check for PCM (engine control related) DTCs. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. If only DTC 12 is present, go to next step. If any DTC other than DTC 12 is present, diagnose and repair referring to appropriate diagnostic procedure.
  3. Turn ignition off. Disconnect TCM and PCM harness connectors. Using a DVOM, measure resistance between ground and TCM harness connector B8 (Orange wire). If DVOM displays infinity, go to next step. If DVOM displays continuity, repair Orange wire for a short to ground.
  4. Reconnect TCM harness connector. Turn ignition on. Using a DVOM, measure voltage between ground and 16-pin PCM harness connector terminal B5 (Orange wire). If reading is 10-14 volts, check for an intermittent problem or faulty PCM. See DIAGNOSTIC AIDS . If reading is not as specified, substitute TCM with a known-good unit. Retest system.
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