Starter System

Due to the large amount of current required by the starter motor (11002) while cranking the engine, the starting system requires:

• The engine to be cranked at a speed fast enough to permit the engine to start.
• Heavy cables, connectors and switches.
• The amount of resistance in the starting circuit to be kept at an absolute minimum to provide maximum current for starter motor operation.

The following will result in slower than normal cranking speeds, and may even prevent the starter motor from cranking the engine:

• A discharged or damaged battery (10653) .
• Loose or corroded connections.
• Partially broken cables.

In case of starting system trouble, the operator may have discharged the battery before calling for assistance:

• A road service procedure is presented to aid the service technician in such cases of starting trouble.
• Be sure to follow diagnosis procedures in the Powertrain Control/Emissions Diagnosis Manual in order to locate the cause of the starting difficulty.
• Road service is not a part of the diagnosis procedures.

The starting system includes:

• Permanent magnet gear-reduction starter motor with a solenoid-actuated drive.
• Remote control starter switch (part of the ignition switch (11572) ).
• Park/neutral position switch (PNP switch) (7A247) (MLP) sensor (automatic transmission).
• Clutch pedal position switch (CPP switch) (11A152) (manual transmission).
• ISO-starter relay.
• Heavy circuit wiring.

Vehicles equipped with a manual transmission have a clutch pedal position switch in the starter circuit that prevents operation of the starter motor unless the clutch pedal is depressed.

Vehicles equipped with an automatic transmission have a manual lever position (MLP) sensor in the starter control circuit, which prevents operation of the starter motor unless the selector lever is in the NEUTRAL or PARK position.