83 (1993-1994 Vehicles) Low Coolant Flag

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The PCM monitors the low coolant switch by providing 12 volts to the switch which is pulled to ground at the splice pack. When the switch opens the PCM is sent high and the information flag is set and the HOT light will flash.

Information Flag Parameters

Information flag 83 will set if:

  • The coolant switch opens for 20 seconds with engine running.

Diagnostic Aids

  • The low coolant switch is located in the coolant recovery tank and is a normally closed switch when the coolant bottle is at proper level.
  • Pressure check system for leaks.

NOTICE: Information flags should he used for diagnostic purposes only. They do not necessarily indicate failure.

  • Normally closed switch when coolant bottle is full.