Section 6.3 Defective Starter

Section 6.3
Defective Starter

To determine if a defective starter is causing no start, perform the following steps:‪

1. Place the red lead of a voltmeter to the solenoid “BAT” terminal. See Figure "Cranking Motor Available Voltage Test" .
   

   1. Black Lead‪	4. Red Lead‪
   2. Starter Ground‪	5. Voltmeter‪
   3. Solenoid Terminal‪

   Figure 1. Cranking Motor Available Voltage Test

2. Place the black voltmeter lead to the starter ground terminal. See Figure "Cranking Motor Available Voltage Test" .
3. Engage the starter switch.
4. View the voltage reading on the meter.
   1. If the voltage is less than specification (refer to OEM guidelines) while cranking the engine, replace starter; refer to "6.3.1 Starter Replacement" .
   2. If the voltage is to specification (refer to OEM guidelines) while attempting to crank the engine, check for internal engine damage; refer to "6.4 Internal Engine Damage" .

Section 6.3.1
Starter Replacement

Perform the following steps for starter replacement:‪

1. Replace the starter; refer to MBE 900 Service Manual (6SE9007), electrical equipment chapter.
2. Verify replacement of starter; refer to "6.3.1.1 Test Engine with New Starter" .

Section 6.3.1.1
Test Engine with New Starter

To determine if the new starter resolved no-start conditions, perform the following steps:‪

PERSONAL INJURY ‪
To avoid injury before starting and running the engine, ensure the vehicle is parked on a level surface, parking brake is set, and the wheels are blocked.‪

1. Attempt to start and run the engine, if the engine starts and runs, no further troubleshooting is required. Shut down the engine.
2. If the engine fails to start or run, check for internal engine damage. Refer to "6.4 Internal Engine Damage" .