Pinpoint Test B: The Engine Cranks Slowly

Starting System

Pinpoint Test B: The Engine Cranks Slowly

Normal Operation

A discharged battery, excessive starter draw or high resistance in the battery cables are the most likely causes of a slow cranking engine. It is also possible for internal, mechanical engine damage to result in the engine cranking slowly.

This pinpoint test is intended to diagnose the following:

- Battery

- Wiring, terminals or connectors

- Starter motor

- Battery cables

PINPOINT TEST B : THE ENGINE CRANKS SLOWLY

B1 CHECK THE BATTERIES

- Check the condition and charge of the batteries.

Are the batteries OK?

Yes
GO to B2.

No
CHARGE or INSTALL new batteries as required. TEST the system for normal operation.

B2 CHECK THE VOLTAGE TO THE STARTER MOTOR

- Ignition OFF.

- Measure the voltage between the starter motor solenoid positive terminal and ground.





Is the voltage 10 volts or greater?

Yes
GO to B3.

No
REPAIR circuit SDC02 (RD). CLEAN and TIGHTEN the connections at the battery terminals. TEST the system for normal operation.

B3 CHECK MOTOR GROUND CIRCUIT

- Carry out the Motor Ground Circuit Test. Refer to Component Tests. Component Tests and General Diagnostics

Is the ground OK?

Yes
INSTALL a new starter motor. TEST the system for normal operation.

No
REPAIR the ground circuit as necessary. TEST the system for normal operation.