Transmission Range Switch

Transmission range switch is mounted on transaxle assembly. Transmission range switch inputs to PCM indicate which gear is selected. Information from transmission range switch is used by PCM for determining control of IAC valve, timing and canister purge operation. To check transmission range switch, perform functional check of switch. See appropriate SYSTEM & COMPONENT TESTING article. If vehicle is driven with transmission range switch disconnected, idle quality will be affected and a possible false related diagnostic trouble code may be set.