Toyota 84450-41010 Switch Assy, Ignition Or Starter

To check the ignition switch, follow these steps, Trace the wire from the ignition switch to the main wiring harness connector and disconnect it. Then, use an ohmmeter or self-powered test light to assess continuity between the specified switch terminals in different switch positions. If continuity doesn't match the specified values, replace the switch. For ignition switch removal, begin by disconnecting the battery's negative terminal cable and placing the ignition key in the ACC position. Proceed to remove the steering wheel and steering column covers. Then, take out the steering column switches and unplug the ignition switch wiring harness connectors. Detach the switch retaining screws and remove the switch assembly from the steering column. Installation involves reversing the removal process. To remove the Ignition Lock Cylinder, depress the Ignition Lock Cylinder retaining pin using a small screwdriver or punch, then pull the Ignition Lock Cylinder straight out from the vehicle. To install the Ignition Lock Cylinder, depress the retaining pin and guide the Ignition Lock Cylinder into the steering column housing until the retaining pin locks into the locating hole. The rest of the installation process is the reverse of the removal steps.

On Tacoma you must disconnect the battery cable at its negative terminal followed by disabling voice app security when it exists. After disconnecting power, disable airbags and remove steering wheel components to get access by taking off protective steering column shields. Pull away the starter switch bezel and disconnect its electrical connectors from the ignition part. Using an ohmmeter test all switch connections: the LOCK position should have no continuity but ACC enables connection between terminals 2 and 3. In ON mode you should see links between terminals 2, 3, 4 and 6, 7. When starting the engine terminals 1, 2, and 4 as well as 6, 7, and 8 need to be connected. Test the key unlock warning switch between OFF mode and the key removed until you find no connection between the two terminals. Insert your key and turn the switch ON to validate 1 and 2 terminal connection. The replacement of ignition switch becomes necessary when manual operation fails. First insert the key into the ignition switch Ignition Lock Cylinder then switch it to ACC mode. Next follow this step by inserting a small screwdriver to depress the release button while pulling the lock cylinder straight out. The process to install a part follows the opposite steps of when you took it out.