Tundra 4WD V8-4.7L (2UZ-FE) (2003)
17. DO HOLD-IN COIL OPEN 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.
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 pinion gear moves outward.
2. DO HOLD-IN TEST
While connected as above with the pinion gear out, disconnect the negative (-) lead from terminal C. Check that the pinion gear remains out.
3. INSPECT CLUTCH PINION GEAR RETURN