DTC B1D31:94, B1D32:92 [WATER HEATER SYSTEM]
id070228730500
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DTC |
B1D31:94 |
Flame detected prior to normal operation |
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B1D32:92 |
Multiple flame interruption during heating cycle |
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DETECTION CONDITION
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• CPU detects malfunction in the water heater unit
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POSSIBLE CAUSE
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• Disturbance in the fuel supply
• Blocked air intake or exhaust of the water heater unit
• Water heater unit malfunction
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Diagnostic procedure
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STEP |
INSPECTION |
ACTION |
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1
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INSPECT FUEL SUPPLY SYSTEM
• Are there any problems on the fuel lines, or on the fuel supply system? (E.g. blocked fuel line)
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Yes
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Replace the fuel supply system, then go to Step 4.
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No
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Go to the next step.
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2
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INSPECT AIR INTAKE AND EXHAUST SYSTEM
• Are there any problems on the air intake or on the exhaust system? (E.g. blocked air intake, blocked exhaust pipe)
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Yes
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Replace the air intake or exhaust system, then go to Step 4.
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No
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Go to the next step.
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3
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INSPECT WATER HEATER UNIT
• Perform the water heater system operation check.
• Clear DTCs using the M-MDS.
• Perform the water heater unit DTC inspection using the M-MDS.
• Are DTCs B1D31:94 or B1D32:92 displayed?
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Yes
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Replace the water heater unit, then go to the next step.
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No
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Go to the next step.
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4
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VERIFY AFTER REPAIR PROCEDURE
• Perform after repair procedure.
• Are any DTCs present?
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Yes
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Go to the applicable DTC troubleshooting.
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No
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Troubleshooting completed.
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