Tundra 2WD V6-3.4L (5VZ-FE) (2004)
Using an ohmmeter, check that there is continuity between terminals 50 and C.
If there is no continuity, check and replace the magnetic switch.
17. DO HOLD-IN COIL CIRCUIT TEST
Using an ohmmeter, check that there is continuity between terminal 50 and the switch body.
If there is no continuity, replace the magnetic switch assembly.
TEST
NOTE: These tests must be done within 3 to 5 seconds to avoid burning out the coil.
1. DO PULL-IN TEST
a. Disconnect the field coil lead wire from terminal C.
b. Connect the battery to the magnetic switch as shown.
Check that the clutch pinion gear moves outward.
2. DO HOLD-IN TEST
With battery connected as above with the clutch pinion gear out, disconnect the negative (-) lead from terminal C. Check that the pinion gear
remains out.