Inhibitor Switch: Inspection

WARNING: This page is about a different car, the 2019 Subaru Ascent. However, it is still accessible from the selected car via links, so may be relevant.

When the driving condition or starter operation is improper, first check the shift linkage for improper operation. If the shift linkage is functioning properly, check the inhibitor switch.

Remove the intercooler. Ref. to INTAKE (INDUCTION) (H4DOTC)>INTERCOOLER>REMOVAL .
Disconnect the engine wiring harness connector.

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Check for continuity in inhibitor switch circuit by shifting the select lever in "P", "R", "N" and "D".

NOTE:

Check that there is no continuity in the starter circuit when the select lever is in the "R" and "D" ranges.
When inhibitor switch is normal, check there is no poor contact in vehicle side connector and no open circuit in harness.

Signal sent to TCM	Range	Terminal No.
	P	4 - 24
	R	5 - 24
	N	9 - 24
	D	10 - 24
Starter signal	P/N	6 - 8
Back-up light circuit	R	25 - 29

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Check that there is continuity at equal points when the select lever is moved 1.5° in both directions from the "N" range.
If there is continuity in only one direction or in other points, adjust the inhibitor switch. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR690)>INHIBITOR SWITCH>ADJUSTMENT .

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Repeat the above inspection in other gear ranges. If there is fault, adjust the inhibitor switch and select cable.
- For adjustment of inhibitor switch, refer to "CONTINUOUSLY VARIABLE TRANSMISSION (TR690)" information. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR690)>INHIBITOR SWITCH>ADJUSTMENT .
- For adjustment of select cable, refer to "CONTROL SYSTEM" information. Ref. to CONTROL SYSTEMS>SELECT CABLE>ADJUSTMENT .