OEM 2004 Toyota Matrix Starter Motor

2004 Toyota Matrix Parts Questions & Experts Answers

• Q: How to service and repair the starter motor on 2004 Toyota Matrix?

  A: Service and repair operations on the starter motor should begin with terminal C lead wire disconnection from terminal C followed by 2 screw removal to detach the starter drive housing repair service kit while simultaneously extracting the return spring and plunger. Start the yoke assembly removal procedure by unscrewing the 2 through bolts and gently pulling the coupling joined with the end frame to separate them. The process requires removal of the starter armature plate from the starter yoke followed by the fast removal of the starter commutator end frame cover using a screwdriver. Feel free to use snap ring pliers and then eliminate the snap ring after which you can extract the washer and starter armature from the starter commutator end frame. Remove the 3 planetary gears from the starter center bearing clutch before extracting the starter center bearing clutch and its accompanying starter drive lever set pin from the starter drive housing where you will eventually eliminate the set pin from the clutch unit. Check the repair service starter kit functions by pushing the plunger then check for quick plunger return. Replace the kit if it does not function correctly. An ohmmeter test of terminals 50 vs C and terminal 50 and switch body continuity should be performed where the kit needs replacement if continuity is not present. The inspection of starter armature assembly requires testing for segment continuity between commutator segments and no continuity between commutator and armature coil core. An armature replacement occurs if necessary. The 400-grit sandpaper should be used to clean commutator surfaces that are burnt or dirty. Measure the commutator depth with a vernier caliper since replacement of the armature becomes necessary when the depth reaches 3.8 mm (0.150 in. or more). Connectivity tests of the end frame assembly must include brush length assessment and discontinuity testing between positive and negative brushes before replacing the frame. The inspection of the starter center bearing clutch sub-assembly requires a clockwise rotation of the clutch pinion gear to check for smooth operation and a counterclockwise rotation to test the locking ability; if either fails replace the sub-assembly along with an evaluation of the gear teeth for signs of wear or damage. Put the starter drive lever set pin into the starter center bearing clutch before mounting the clutch device and pin into the starter drive housing. Apply grease to the planetary gears as well as the pin components before installing the three planetary gears onto the starter center bearing clutch. Before assembling the starter armature with its washer into the starter commutator end frame apply grease to the components. Use snap ring pliers to insert a new snap ring and measure its length to prevent it from exceeding 0.197 inches (5.0 mm). Mount the starter commutator end frame cover while guiding the keyway of the starter armature plate to match the key inside the starter yoke and finish plate installation. Before installation of the starter commutator end frame, align the rubber and its starter yoke cutout then install the frame. Next, align the starter yoke key with the starter drive housing keyway then fix it by tightening two through bolts to a torque of 6.0 Nm (61 kgf-cm, 53 in.-lbf). After applying grease to the plunger and hook you should hang the plunger hook onto the starter drive lever set pin and install the plunger and return spring. Secure the repair service starter kit with 2 screws at 7.5 Nm (76 kgf-cm, 66 in.-lbf) torque setting and connect the lead wire to terminal C using a 10 Nm (102 kgf-cm, 7 ft-lbf) torque.