Operation CHARM: Car repair manuals for everyone.

Transmission Control System Relay: Testing and Inspection

A/T Control Relay Check
Remove the A/T control relay.
Use jumper wires to connect A/T control relay terminal (2) to the battery (+) terminal and terminal (4) to the battery (-) terminal.
Check the continuity between terminal (1) and terminal (3) of the A/T control relay when the jumper wires are connected to and disconnected from the battery.






If there is a problem, replace the A/T control relay.