TROUBLE SHOOTING
Note. See TROUBLE SHOOTING article in GENERAL INFORMATION.
PARK/NEUTRAL POSITION (PNP) SWITCH TEST
Disconnect park/neutral position switch connector. See COMPONENT LOCATIONS table. Check for continuity between specified terminals of park/neutral position switch. See PARK/NEUTRAL POSITION (PNP) SWITCH CONTINUITY SPECIFICATIONS table. (Scheme 1) If continuity is not as specified, replace park/neutral position switch.
| Gearshift Position | Continuity Between Terminals | |
|---|---|---|
| ES300 | ||
| P | 2 & 7; 5 & 6 | |
| R | 2 & 8 | |
| N | 2 & 9; 5 & 6 | |
| D | 2 & 10 | |
| 2 | 2 & 3 | |
| L | 2 & 4 | |
| GS300, GS400, LS400, SC300 & SC400 | ||
| P | 5 & 6; 4 & 7 | |
| R | 4 & 8 | |
| N | 5 & 6; 4 & 10 | |
| D | 4 & 9 | |
| 2 | 2 & 4 | |
| L | 3 & 4 | |
PARK/NEUTRAL POSITION (PNP) SWITCH CONTINUITY SPECIFICATIONS
Scheme 1
Remove starter relay. See COMPONENT LOCATIONS table. Starter relay is okay if there is continuity between terminals No. 1 and 2. (Scheme 2) There is no continuity between terminals No. 3 and 5. There is continuity between terminals No. 3 and 5 when battery voltage is applied across terminals No. 1 and 2.
Scheme 2
BENCH TESTING
| CAUTION | DO NOT keep solenoid engaged for more than 3-5 seconds. |
SOLENOID TEST
- Disconnect starter field coil lead from terminal "C". Connect battery to starter solenoid. (Scheme 3), STEP 1. Clutch pinion gear should move outward. If clutch pinion gear does not move outward, replace starter solenoid.
- If gear moves outward, disconnect jumper lead from terminal "C". (Scheme 3), STEP 2. Clutch pinion gear should remain in outward position. If clutch pinion gear DOES NOT remain in outward position, replace starter solenoid.
- If clutch pinion gear remains in outward position, disconnect jumper lead from starter housing. (Scheme 3), STEP 3. Clutch pinion gear should move inward. If clutch pinion gear does not move inward, replace starter solenoid.
Scheme 3
NO-LOAD TEST
| CAUTION | DO NOT operate starter motor for more than 3-5 seconds. |
Connect battery and ammeter to starter. (Scheme 3), STEP 4. Starter armature should rotate smoothly and steadily. Amperage draw should be within specification. See NO-LOAD TEST SPECIFICATIONS table.
| Application | Maximum Amps | Volts |
|---|---|---|
| ES300, GS300 & SC300 | 90 | 11.5 |
| GS400, LS400 & SC400 | 100 | 11.5 |
NO-LOAD TEST SPECIFICATIONS
ARMATURE TEST
- Ensure continuity exists between all segments of commutator. Ensure continuity does not exist between commutator and armature coil core. If continuity is not as specified, replace armature. If commutator diameter does not meet minimum specification, replace armature. See appropriate STARTER OVERHAUL SPECIFICATIONS table under «STARTER SPECIFICATIONS»(ref-96778-S33745375142001041900000) .
- If commutator runout exceeds maximum specification, turn commutator on a lathe. If depth of mica undercut does not meet minimum specification, use a hacksaw blade to remove mica from between segments.
FIELD WINDINGS TEST
Ensure continuity exists between starter solenoid lead and brush lead. Ensure continuity does not exist between brush lead and stator housing. If continuity is not as specified, replace field windings.