GM Service Manual Online
For 1990-2009 cars only
Table 1: No Crank
Table 2: Crank OK, But Too Slow
Table 3: Starter Motor Does Not Stop
Table 4: Starter Motor Running, But Not Cranking
Table 5: Overcharging Battery
Table 6: Battery Discharge
Table 7: Charging Indicator Lamp Does Not Work When the Ignition Switch is ON - Engine Does Not Work
Table 8: Charging Indicator Lamp Does Not Put Out Lights After Starting the Engine
Table 9: Hard to Start the Engine
Table 10: Engine Idling State is Unstable
Table 11: Poor Engine Accelerating

No Crank

Checks

Actions

Low battery voltage

Charging the battery or replace the battery.

Battery cable is loose, corroded, or damaged.

Repair or replace the battery cable.

Faulty starter motor or starter motor circuit is open.

Repair or replace the starter motor/starter motor circuit.

Faulty ignition switch or fuse Ef2 is blown.

Replace the ignition switch or fuse Ef2.

Ground short

Repair the ground short.

Crank OK, But Too Slow

Checks

Actions

Low battery voltage

Charging the battery or replace the battery.

    • Battery
    • Battery cables is loose, corroded, or damaged.

Repair or replace the battery cable.

Faulty starter motor

Repair or replace the starter motor.

Starter Motor Does Not Stop

Checks

Actions

Faulty starter motor

Repair or replace the starter motor.

Faulty ignition switch

Replace the ignition switch.

Starter Motor Running, But Not Cranking

Checks

Actions

Broken clutch pinion gear or faulty starter motor

Replace the starter motor.

Broken flywheel ring gear

Replace the flywheel.

Connected circuit is open.

Repair the open circuit.

Overcharging Battery

Checks

Actions

Faulty IC regulator

Replace the IC regulator.

Battery Discharge

Checks

Actions

Loosen the generator drive belt.

Adjust the belt tension or replace the belt.

The circuit is open or shorted.

Repair the open or shorted circuit.

Faulty IC regulator

Replace the IC regulator.

Battery run down

Replace the battery.

Open ground circuit

Repair the open ground circuit.

Charging Indicator Lamp Does Not Work When the Ignition Switch is ON - Engine Does Not Work

Checks

Actions

Fault IC regulator

Replace the IC regulator.

Charging indicator lamp is blown or fuse F8 is blown.

Repair or replace the charging indicator lamp/fuse F8.

Faulty ignition switch

Replace the ignition switch.

Generator ground circuit is open or shorted.

Repair the circuit.

Charging Indicator Lamp Does Not Put Out Lights After Starting the Engine

Checks

Actions

Faulty IC regulator

Replace the IC regulator.

Battery cable is corroded or damaged.

Repair or replace the battery cable.

Loosen the generator drive belt.

Adjust the belt tension or replace the belt.

Faulty wiring harness

Repair the wiring harness.

Hard to Start the Engine

Checks

Actions

Faulty ignition coil

Replace the ignition coil.

Faulty distributor,include the optical sensor

Replace the distributor or the optical sensor.

Faulty spark plug

Replace the spark plug or adjust the gap.

Poor ignition timing

Reset the valve timing.

Engine Idling State is Unstable

Checks

Actions

Faulty spark plug

Replace the spark plug or adjust the gap.

Faulty ignition coil

Replace the ignition coil.

Poor ignition timing

Reset the valve timing.

Poor Engine Accelerating

Checks

Actions

Poor ignition timing

Reset the valve timing.