Pinpoint Test B: The Engine Cranks Slowly

Starting System

Refer to Wiring Diagram Set 20 for schematic and connector information Diagrams By Number.

Pinpoint Tests

Pinpoint Test B: The Engine Cranks Slowly

Refer to Wiring Diagram Set 20 for schematic and connector information Diagrams By Number.

In normal operation, voltage from Smart Junction Box (SJB) fuse 27 (20A) is supplied to the ignition switch through circuit SBP27 (BU/RD). When the ignition switch is placed in the START position, voltage is supplied through circuit CDC35 (BU/WH) to the starter relay. The starter relay is supplied ground from the PCM through circuit CDC12 (YE). Power is supplied at all times to the starter motor from the battery through circuit SDC02 (RD). The starter relay has voltage supplied at all times from Battery Junction Box (BJB) fuse 13 (30A), through circuit SBB13 (GY/RD). When the starter relay is energized, voltage supplied to the starter relay is sent to the starter motor solenoid through circuit CDC25 (BN/GN). The starter motor is disengaged when the key is released from the START position.

This pinpoint test is intended to diagnose the following:
- Battery
- Starter motor/solenoid
- Circuit



PINPOINT TEST B: THE ENGINE CRANKS SLOWLY

NOTE: Before beginning this test, be sure that the battery is tested and fully charged.

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B1 CHECK THE VOLTAGE TO THE STARTER


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




- Is the voltage 10 volts or greater?

Yes
GO to B2.

No
REPAIR the circuit between the battery and the starter solenoid. CLEAN and TIGHTEN the connections at the battery terminals. TEST the system for normal operation.

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B2 CHECK THE MOTOR GROUND CIRCUIT


- Carry out the Motor Ground Circuit Voltage Drop Test. Refer to the 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.

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