Check engine speed during cranking. Is engine speed above 100 rpm (min-1)? YES - Go to step 8. NO - Remove and disassemble the starter, and check for the following until you find the cause. Excessively worn starter brushes Open circuit in commutator brushes Dirty or damaged helical splines or drive gear Faulty drive gear clutch Check the cranking voltage and current draw. Is cranking voltage no less than 8.0 volts (D15Y2, D16W7 (KG model), D16W8, D17Z1 (Except Malaysia model), D17Z2, D17Z3, D17A1, D17A2 (Except Malaysia model), D17A5 (Except Indonesia model) engines) or 9.0 volts (Except D15Y2, D16W7 (KG model), D16W8, D17Z1 (Except Malaysia model), D17Z2, D17Z3, D17A1, D17A2 (Except Malaysia model), D17A5 (Except Indonesia model) engines) and current draw no more than 200 amps (D15Y2, D16W7 (KG model), D16W8, D17Z1 (Except Malaysia model), D17Z2, D17Z3, D17A1, D17A2 (Except Malaysia model), D17A5 (Except Indonesia model) engines) or 150 amps (Except D15Y2, D16W7 (KG model), D16W8, D17Z1 (Except Malaysia model), D17Z2, D17Z3, D17A1, D17A2 (Except Malaysia model), D17A5 (Except Indonesia model) engines)? YES - Go to step 9. NO - Remove and disassemble the starter, and check for the following until you find the cause. Open circuit in starter armature commutator segments Starter armature dragging Shorted armature winding Excessive drag in engine Remove the starter and inspect its drive gear and the flywheel or torque converter ring gear for damage. Replace any damaged parts.