Cold Cranking Test

The battery must be fully-charged and load tested before proceeding. Refer to Battery for more information.

Volts-Amps Tester Connections - Typical:

1. Connect a suitable volt-ampere tester to the battery terminals. Refer to the operating instructions provided with the tester being used.
2. Fully engage the parking brake.
3. Place the automatic transmission gearshift selector lever in the Park position.
4. Verify that all lamps and accessories are turned off.
5. To prevent the engine from starting, unplug the Automatic ShutDown (ASD) relay. The ASD relay is located in the Power Distribution Center (PDC). Refer to the PDC label for ASD relay identification and location.
6. Rotate and hold the ignition switch in the Start position. Note the cranking voltage and current (amperage) draw.
a. If the voltage reads below 9.6 volts, remove the starter for bench testing. If the starter bench test is not OK, replace the faulty starter.
b. If the voltage reads above 9.6 volts and the current (amperage) draw reads below specifications, see Feed Circuit Test in the Diagnostic procedures.
c. If the voltage reads 12.5 volts or greater and the starter does not turn, see Control Circuit Test in the Diagnosis procedures.
d. If the voltage reads 12.5 volts or greater and the starter turns very slowly, see Feed Circuit Test in the Diagnostic procedures.

NOTE: A cold engine will increase the starter current (amperage) draw reading, and reduce the battery voltage reading.