LEMON Manuals: Even more car manuals for everyone
Home >> Mazda >> 2007 >> B2300 Standard >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Troubleshooting (Instrumentation/Driver Information) >> Pinpoint Test 27: The FAILSAFE Cooling Warning Indicator Is Never/Always On >> Possible Causes

Possible Causes

FAILSAFE COOLING WARNING INDICATOR IS NEVER/ALWAYS ON - PINPOINT TEST REFERENCE

PINPOINT TEST 27 THE FAILSAFE COOLING WARNING INDICATOR IS NEVER/ALWAYS ON
STEP INSPECTION ACTION
1 RETRIEVE THE RECORDED DTCs FROM BOTH THE CONTINUOUS AND ON-DEMAND PCM SELF-TESTS
  • Retrieve the recorded DTCs from the PCM continuous and on-demand self-tests.
  • Are any DTCs retrieved? 
Yes See DIAGNOSTIC TROUBLE CODE (DTC) INDEX - POWERTRAIN CONTROL MODULE (PCM) , .
No Go to next step.
2 RETRIEVE THE RECORDED DTCs FROM BOTH THE CONTINUOUS AND ON-DEMAND INSTRUMENT CLUSTER SELF-TESTS
  • Retrieve the recorded DTCs from the instrument cluster continuous and on-demand self-tests.
  • Is DTC U0294 retrieved? 
Yes Clear the DTCs. Repeat the self-test. If DTC U0294 is retrieved again, go to step 4. For all other instrument cluster DTCs, See INSTRUMENT CLUSTER DIAGNOSTIC TROUBLE CODE (DTC) INDEX , .
No Go to next step.
3 CARRY OUT THE INSTRUMENT CLUSTER INDICATOR LAMP COMMAND USING THE SCAN TOOL
  • Key ON engine OFF (KOEO).
  • Enter the following diagnostic mode on the scan tool:
    • Instrument Cluster Active Command
  • Select the indicator lamp active command. Select the failsafe warning indicator active command on then off. Observe the failsafe warning indicator.
  • Does the failsafe warning indicator turn on when commanded on and turn off when commanded off? 
Yes Go to next step.
No Go to step 5.
4 CHECK FOR CORRECT PCM OPERATION
  • Disconnect all the PCM connectors.
  • Check for:
    • corrosion
    • damaged pins
    • pushed-out pins
  • Connect the all the PCM connector and make sure they seat correctly.
  • Operate the system and verify the concern is still present.
  • Is the concern still present? 
Yes Install a new PCM. See POWERTRAIN CONTROL MODULE (PCM) REMOVAL / INSTALLATION , . Test the system for normal operation.
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
5 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION
  • Disconnect all instrument cluster connectors.
  • Check for:
    • corrosion
    • damaged pins
    • pushed-out pins
  • Connect all instrument cluster connectors and make sure they seat correctly.
  • Operate the system and verify the concern is still present.
  • Is the concern still present? 
Yes Install a new instrument cluster. see INSTRUMENT CLUSTER . Test the system for normal operation.
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.