Signal Circuit Inspection
- Connect an Inhibitor switch.
- Ignition "ON" & Engine "OFF".
- Measure voltages between each terminal and chassis ground during shift lever changed "P, R, N, D".
Specification: See below "Inhibitor switch specification"
Inhibitor Switch Specification NO IGN SW SELECT SIGNAL Inhibitor Switch 1 (S1) Inhibitor Switch 2 (S2) Inhibitor Switch 3 (S3) Inhibitor Switch 4 (S4) 1 ON P Range SW 12V 0V 0V 0V 2 ON R Range SW 0V 12V 0V 0V 3 ON N Range SW 0V 0V 12V 0V 4 ON D Range SW 0V 0V 0V 12V - Is the measured voltage within specifications?
YES
- Substitute with a known-good Inhibitor switch and check for proper operation. If the problem is corrected, replace Inhibitor switch and then go to "Verification of Vehicle Repair " procedure.
NO
- Check a battery short circuit, a ground short circuit at the wiring of Inhibitor switch and then go to "Verification of Vehicle Repair " procedure.
- If wiring of Inhibitor switch is normal then, Substitute with a known-good Inhibitor switch and check for proper operation. If the problem is corrected, replace Inhibitor switch and then go to "Verification of Vehicle Repair " procedure.