Pinpoint Test

WARNING: Always allow the engine to cool before opening the cooling system. Do not unscrew the coolant pressure relief cap when the engine is operating or the cooling system is hot. The cooling system is under pressure; steam and hot liquid can come out forcefully when the cap is loosened slightly. Failure to follow these instructions may result in serious personal injury.

CARRY OUT INSPECTION AND VERIFICATION
1. Carry out Inspection and Verification. REFER to Symptom Chart: Engine Cooling .
  Were any concerns found?
  1. Yes: REPAIR as needed. TEST the system for normal operation.
  2. No: GO to 2 .
CHECK FOR DTC P0125 or P0128
1. Check for DTC P0125 or P0128.
  Is DTC P0125 or P0128 present?
  1. Yes: GO to 3 .
  2. No: The cooling system is operational. If an inoperative temperature gauge is suspected, CHECK the temperature gauge operation.
    REFER to DIAGNOSTIC ROUTINE D : Incorrect Temperature Gauge Indication. If an inoperative climate control system is suspected, CHECK the climate control system operation.
    
    REFER to DIAGNOSTIC ROUTINE I : Climate Control System Functional Test, or
    
    REFER to DIAGNOSTIC ROUTINE G : Climate Control System Functional Test.
    
    If any other PCM DTCs are retrieved, REFER to DTC CHART: POWERTRAIN CONTROL MODULE (PCM) .
CHECK THE ELECTRIC COOLING FAN OPERATION
1. Allow the engine to cool.
2. Make sure the A/C switch is OFF.
3. Start the engine.
4. Check the electric cooling fan.
  Is the electric cooling fan on all the time?
  1. Yes: DIAGNOSE the electric cooling fan operation. REFER to the SECTION 3: SYMPTOM CHARTS .
  2. No: GO to 4 .
CHECK THE COOLANT LEVEL
NOTE: Allow the engine to cool before checking the coolant level.
1. Visually check the engine coolant level in the coolant expansion tank.
  Is the engine coolant level within specification?
  1. Yes: INSTALL a new thermostat. TEST the system for normal operation.
  2. No: REFER to Diagnostic Routine A: Loss of Coolant .