WATER HEATER SYSTEM ON-BOARD DIAGNOSTIC FUNCTION
BME070200000T01
Outline
• The CPU determines that there is a malfunction, and outputs a signal as a DTC to the DLC-2.
• Using an SST (WDS or equivalent), DTCs can be displayed and deleted.
DTC Table
|
DTC
|
Possible cause
|
|
B1317
|
Input voltage high
|
|
B1318
|
Input voltage low
|
|
B1342
|
Malfunction in water heater unit
|
|
B2449
|
Glow plug circuit short to ground
|
|
B2450
|
Glow plug circuit open
|
|
B2451
|
Fuel pump circuit short to ground
|
|
B2452
|
Fuel pump circuit open
|
|
B2453
|
Blower fan circuit short to ground
|
|
B2454
|
Blower fan circuit open
|
|
B2463
|
Overheat
|
|
B2537
|
Water heater system does not start
|
|
B2538
|
Unstable flame
|
|
B2547
|
Flame prior to operation
|
|
B2548
|
Water heater lockout mode
|
-
* :
If a DTC not listed above is detected, there is a water heater malfunction, and the water heater must be replaced.