DTC |
Description |
Possible causes |
Action |
B1A0016 |
Control Module |
- Control module circuit voltage below threshold: Voltage less than
(master control module voltage - 2V) for > 10 seconds
|
Check the battery condition and state of charge. Refer to
the relevant section of the workshop manual. Check the module power and
ground circuits. Refer to the electrical guides. |
B1A0017 |
Control Module |
- Auxiliary heater control module circuit voltage above threshold
|
Check the battery condition and state of charge. Refer to
the relevant section of the workshop manual. Check the module power and
ground circuits. Refer to the electrical guides. |
B1A0043 |
Control Module |
- Control module deactivated
- Service requested by heater
- Module in lock-out mode
|
Check for associated DTCs. Check for other faults which may
cause the system to shut-down. |
B1A0049 |
Control Module |
- Auxiliary heater control module internal electronic failure
|
Renew the auxiliary heater assembly. Refer to the warranty
policy and procedures manual if a module is suspect. |
B1D2211 |
Coolant Temperature Sensor |
- Internal control module sensor circuit short circuit to ground
|
Renew the auxiliary heater assembly. Refer to the warranty
policy and procedures manual if a module is suspect. |
B1D2215 |
Coolant Temperature Sensor |
- Internal control module sensor circuit short circuit to power
- Sensor circuit high resistance
|
Renew the auxiliary heater assembly. Refer to the warranty
policy and procedures manual if a module is suspect. |
B1D2313 |
Overheat Sensor |
- Internal control module sensor circuit high resistance
|
Renew the auxiliary heater assembly. Refer to the warranty
policy and procedures manual if a module is suspect. |
B1D2411 |
Glow Plug |
- Internal control module glow plug circuit short circuit to ground
|
Renew the auxiliary heater assembly. Refer to the warranty
policy and procedures manual if a module is suspect. |
B1D2415 |
Glow Plug |
- Internal control module glow plug circuit short circuit to power
- Glow plug circuit high resistance
|
Renew the auxiliary heater assembly. Refer to the warranty
policy and procedures manual if a module is suspect. |
B1D2511 |
Heater Fuel Pump |
- Pump circuit short circuit to ground
|
Check the auxiliary heater fuel pump and circuits. Refer to
the electrical guides. |
B1D2515 |
Heater Fuel Pump |
- Pump circuit short circuit to power
- Pump circuit high resistance
|
Check the auxiliary heater fuel pump and circuits. Refer to
the electrical guides. |
B1D2611 |
Combustion Air Blower |
- Internal control module combustion air fan circuit short circuit to
ground
|
Renew the auxiliary heater assembly. Refer to the warranty
policy and procedures manual if a module is suspect. |
B1D2615 |
Combustion Air Blower |
- Internal control module combustion air fan circuit short circuit to
power
- Combustion air fan circuit high resistance
|
Renew the auxiliary heater assembly. Refer to the warranty
policy and procedures manual if a module is suspect. |
B1D2692 |
Combustion Air Blower |
- Internal control module combustion air fan performance
- Combustion air fan incorrect operation
|
Renew the auxiliary heater assembly. Refer to the warranty
policy and procedures manual if a module is suspect. |
B1D2693 |
Combustion Air Fan |
- Internal control module combustion air fan no operation
|
Renew the auxiliary heater assembly. Refer to the warranty
policy and procedures manual if a module is suspect. |
B1D2711 |
Heater Coolant Pump |
- Heater coolant pump circuit short circuit to ground
|
Check the FFBH water pump and circuits. Refer to the
electrical guides. |
B1D2715 |
Heater Coolant Pump |
- Heater coolant pump circuit short circuit to power
- Heater coolant pump circuit high resistance
|
Check the FFBH water pump and circuits. Refer to the
electrical guides. |
B1D2993 |
No Start, Even After Restart Attempt |
- No flame detected, even after restart attempt
|
Check the fuel supply, Check the pump and circuits. Refer to
the electrical guides. |
B1D3093 |
No Start In Test Mode |
- No flame detected in test mode
|
Check the fuel supply, Check the pump and circuits. Refer to
the electrical guides. |
B1D3194 |
Flame Detected Prior to Normal Operation |
- Flame detected prior to normal operation
|
Check for fuel leakage, etc. |
B1D3292 |
Multiple Flame Interruption During Heating Cycle |
- Heater interrupted more than a specified number of times in heating
cycle
|
Check the system operation, check for restricted fuel lines,
etc. |
B1D3392 |
Flame Interruption During Normal Operation |
- Heater interrupted more than a specified number of times in
operation
|
Check the system operation, check for restricted fuel lines,
etc. |
B1D3468 |
Heater In Lock Out Mode |
|
Check for other DTCs and rectify first. Clear the DTCs and
retest. if the DTC persists, renew the auxiliary heater assembly. Refer to
the warranty policy and procedures manual if a module is suspect. |
U007308 |
Control Module Communication Bus A Off |
|
Check the CAN circuits. Refer to the electrical guides.
|
U016487 |
Lost Communication With HVAC Control Module |
- Auxiliary heater control module; missing message
- BCM: Missing message
- IPK: Missing message
|
Refer to the lost communication statement in the Network
Communications section of the workshop manual. |
U1A3787 |
Crash Status Telegram |
- Crash interlock active (internal to module)
|
Check the restraints control module for indications of a
crash event. The heater is shut-down if this occurs. Clear the DTC and
retest. |
U1A0008 |
Private Bus Circuit |
- Signal/Message failure/error occurred in W-Bus communication
|
Refer to the Network Communications section of the workshop
manual. |
U1A0395 |
Car Config Parameter |
- Vehicle configuration mismatch
|
Configure the module using the approved diagnostic system.
|
U1A446C |
Fuel Level |
- Fuel level below threshold
|
Add fuel, clear DTC and recheck. |
U300055 |
Control Module |
- Auxiliary heater control module not configured
|
Configure the module using the approved diagnostic system.
|