DTC B1342, B2463, B2537, B2538, B2547, B2548


id070200817600

DTC

B1342

Malfunction in water heater unit

B2463

Overheat

B2537

Water heater system does not start

B2538

Unstable flame

B2547

Flame prior to operation

B2548

Water heater lockout mode

DETECTION CONDITION

• CPU detects malfunction in water heater unit

POSSIBLE CAUSE

• Water heater unit malfunction
- CPU malfunction
- Glow plug malfunction
- Flame detection sensor malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
INSPECT WATER HEATER UNIT
• Replace the water heater unit. (See WATER HEATER UNIT REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)
• Perform the Combustion Test. (SeeKOEO Self Test/Combustion Test.)
• Are any DTCs present?
Yes
Go to the applicable DTC troubleshooting.
No
Troubleshooting completed.