TCM Self-Diagnosis Does Not Activate
TCM Self-Diagnosis Does Not ActivateSYMPTOM: OD OFF indicator lamp does not come on in TCM self-diagnostic procedure even if the lamp circuit is good.
DESCRIPTION
^ PNP switch
PNP switch assembly includes a transaxle position switch. The transaxle position switch detects the selector lever position and sends a signal to the TCM.
^ Overdrive control switch
Overdrive control switch detects the switch position (ON or OFF) and sends the signal via CAN communication to the TCM.
^ Closed throttle position signal and wide open throttle position signal.
ECM judges throttle opening based on a signal from accelerator pedal position sensor, and sends the signal via CAN communication to the TCM.
DIAGNOSTIC PROCEDURE
NOTE: The diagnostic procedure includes inspection for the PNP stitch, overdrive control switch, closed throttle position signal and wide open throttle position signal circuit. Refer to AT-167. PNP, OD Switch and Closed Throttle, Wide Open Throttle Position Signal Circuit