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Home >> Mazda >> 2006 >> B3000 Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Symptom Troubleshooting - (4 Of 5) >> Symptom Troubleshooting Chart - Engine Cooling >> Cooling System Pinpoint Test 4: Block Heater Does Not Operate Properly
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Cooling System Pinpoint Test 4: Block Heater Does Not Operate Properly

COOLING SYSTEM PINPOINT TEST 4: BLOCK HEATER DOES NOT OPERATE PROPERLY

PINPOINT TEST 4 BLOCK HEATER DOES NOT OPERATE PROPERLY
STEP INSPECTION ACTION
1 CHECK THE BLOCK HEATER CABLE
  • Key OFF.
  • Disconnect engine block heater connector.
  • Check resistance in circuits 1, 2, and 3 of the block heater.
  • Is the resistance in circuits 1, 2, and 3 less than 5 ohms? 
 Yes Replace the block heater. See ENGINE BLOCK HEATER REMOVAL / INSTALLATION - 2.3L for 2.3L engine. See ENGINE BLOCK HEATER REMOVAL / INSTALLATION - 3.0L for 3.0L engine. See ENGINE BLOCK HEATER REMOVAL / INSTALLATION - 4.0L for 4.0L engine.
No Replace the block heater cable. See ENGINE BLOCK HEATER REMOVAL / INSTALLATION - 2.3L for 2.3L engine. See ENGINE BLOCK HEATER REMOVAL / INSTALLATION - 3.0L for 3.0L engine. See ENGINE BLOCK HEATER REMOVAL / INSTALLATION - 4.0L for 4.0L engine. Test the system for normal operation.
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