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DTC B1318

id070200815500

DTC B1318 | Input voltage low
DETECTION CONDITION | • Voltage detected at water heater unit terminals A is less than 9 V.
POSSIBLE CAUSE | • Generator malfunction • Battery malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | INSPECT BATTERY VOLTAGE • Measure battery voltage. • Is voltage more than 9 V? | Yes | Go to next step.
No | Battery is weak. • Inspect charging system.
2 | INSPECT WIRING HARNESS BETWEEN W.HEAT 40 A FUSE AND WATER HEATER UNIT • Turn ignition switch to ON position. • Measure voltage at water heater unit connector terminal A. • Is voltage more than 9 V? | Yes | Go to next step.
No | Repair wiring harness.
3 | INSPECT WATER HEATER UNIT • Clear the DTC. • Perform the KOEO Self Test. (SeeKOEO Self Test/Combustion Test.) • Is the same DTC present? | Yes | Replace the water heater unit. (See WATER HEATER UNIT REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)
No | Go to the next step.
4 | VERIFY AFTER REPAIR PROCEDURE • Perform the after repair procedure. (SeeAfter Repair Procedure.) • Are any DTCs present? | Yes | Go to the applicable DTC troubleshooting.
No | Troubleshooting completed.