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Home >> Land Rover >> 2013 >> LR4 Base >> Repair and Diagnosis (Single Page) >> Quick Lookups >> DTC Index >> DTC Index & General Information (2 Of 3) >> Description & Operation >> Diagnostic Trouble Code (DTC) Index - (DTC: Fuel Fired Booster Heater Module (AHCM)) >> Fuel Fired Booster Heater Module (AHCM) >> DTC's
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Fuel Fired Booster Heater Module (AHCM): DTC's

DTC Description Possible Causes Action
B1206-53 Crash Occurred - deactivated
  • Crash signal received over CAN network
NOTE: Event information - the restraints control module has recorded a crash event
  • Using the manufacturer approved diagnostic system, check other modules for related diagnostic trouble codes
B1D22-11 Coolant Temperature Sensor - circuit short to ground
  • Fuel fired booster heater coolant temperature sensor internal fault
  • Check and install a new fuel fired booster heater coolant temperature sensor 
  • Using the manufacturer approved diagnostic system, record then clear any stored diagnostic trouble codes then conduct the fuel fired booster heater operation check  (Setup and configuration/auxiliary heater/operation check)
  • Check for stored diagnostic trouble codes
  • Check for correct operation
B1D22-15 Coolant Temperature Sensor - circuit short to battery or open
  • Fuel fired booster heater coolant temperature sensor internal fault
  • Check and install a new fuel fired booster heater coolant temperature sensor 
  • Using the manufacturer approved diagnostic system, record then clear any stored diagnostic trouble codes then conduct the fuel fired booster heater operation check  (Setup and configuration/auxiliary heater/operation check)
  • Check for stored diagnostic trouble codes
  • Check for correct operation
B1D23-13 Overheat Sensor - circuit open
  • Fuel fired booster heater coolant temperature sensor internal fault
  • Check and install a new fuel fired booster heater coolant temperature sensor 
  • Using the manufacturer approved diagnostic system, record then clear any stored diagnostic trouble codes then conduct the fuel fired booster heater operation check  (Setup and configuration/auxiliary heater/operation check)
  • Check for stored diagnostic trouble codes
  • Check for correct operation
B1D24-11 Glow Plug - circuit short to ground
  • Fuel fired booster heater glow plug internal fault
B1D24-15 Glow Plug - circuit short to battery or open
  • Fuel fired booster heater glow plug internal fault
B1D25-11 Heater Fuel Pump - circuit short to ground
  • Heater fuel pump circuit short to ground
  • Heater fuel pump failure
  • Refer to the electrical circuit diagrams and check the fuel fired booster heater fuel pump and circuit for short to ground
  • Repair the circuit or check and install a new fuel fired booster heater fuel pump  as required
  • Using the manufacturer approved diagnostic system, record then clear any stored diagnostic trouble codes then conduct the fuel fired booster heater operation check  (Setup and configuration/auxiliary heater/operation check)
  • Check for stored diagnostic trouble codes
  • Check for correct operation
B1D25-15 Heater Fuel Pump - circuit short to battery or open
  • Heater fuel pump circuit short to power, open circuit
  • Heater fuel pump failure
  • Refer to the electrical circuit diagrams and check the fuel fired booster heater fuel pump and circuit for short to power, open circuit
  • Repair the circuit or check and install a new fuel fired booster heater fuel pump  as required
  • Using the manufacturer approved diagnostic system, record then clear any stored diagnostic trouble codes then conduct the fuel fired booster heater operation check  (Setup and configuration/auxiliary heater/operation check)
  • Check for stored diagnostic trouble codes
  • Check for correct operation
B1D26-11 Combustion Air Blower - circuit short to ground
  • Fuel fired booster heater module failure
  • Using the manufacturer approved diagnostic system, record then clear any stored diagnostic trouble codes then conduct the fuel fired booster heater operation check  (Setup and configuration/auxiliary heater/operation check)
  • If the diagnostic trouble code reoccurs check and install a new fuel fired booster heater module
  • Refer to the warranty policy and procedures manual, or determine if any prior approval programme is in operation, prior to the installation of a new module/component
B1D26-15 Combustion Air Blower - circuit short to battery or open
  • Fuel fired booster heater module failure
  • Using the manufacturer approved diagnostic system, record then clear any stored diagnostic trouble codes then conduct the fuel fired booster heater operation check  (Setup and configuration/auxiliary heater/operation check)
  • If the diagnostic trouble code reoccurs check and install a new fuel fired booster heater module
  • Refer to the warranty policy and procedures manual, or determine if any prior approval programme is in operation, prior to the installation of a new module/component
B1D26-92 Combustion Air Blower - performance or incorrect operation
  • Fuel fired booster heater module failure
  • Using the manufacturer approved diagnostic system, record then clear any stored diagnostic trouble codes then conduct the fuel fired booster heater operation check  (Setup and configuration/auxiliary heater/operation check)
  • Check for reoccurrence of the diagnostic trouble code
  • If the diagnostic trouble code reoccurs check and install a new fuel fired booster heater module
  • Refer to the warranty policy and procedures manual, or determine if any prior approval programme is in operation, prior to the installation of a new module/component
B1D26-93 Combustion Air Blower - no operation
  • Fuel fired booster heater module failure
  • Using the manufacturer approved diagnostic system, record then clear any stored diagnostic trouble codes then conduct the fuel fired booster heater operation check  (Setup and configuration/auxiliary heater/operation check)
  • Check for reoccurrence of the diagnostic trouble code
  • If the diagnostic trouble code reoccurs check and install a new fuel fired booster heater module
  • Refer to the warranty policy and procedures manual, or determine if any prior approval programme is in operation, prior to the installation of a new module/component
B1D27-11 Heater Coolant Pump - circuit short to ground
  • Heater coolant pump circuit short to ground
  • Heater coolant pump failure
  • Refer to the electrical circuit diagrams and check the fuel fired booster heater water pump and circuit for short to ground
  • Repair the circuit or check and install a new fuel fired booster heater water pump  as required
  • Using the manufacturer approved diagnostic system, record then clear any stored diagnostic trouble codes then conduct the fuel fired booster heater operation check  (Setup and configuration/auxiliary heater/operation check)
  • Check for stored diagnostic trouble codes
  • Check for correct operation
B1D27-15 Heater Coolant Pump - circuit short to battery or open
  • Heater coolant pump circuit short to power, open circuit
  • Heater coolant pump failure
  • Refer to the electrical circuit diagrams and check the fuel fired booster heater water pump and circuit for short to power, open circuit
  • Repair the circuit or check and install a new fuel fired booster heater water pump  as required
  • Using the manufacturer approved diagnostic system, record then clear any stored diagnostic trouble codes then conduct the fuel fired booster heater operation check  (Setup and configuration/auxiliary heater/operation check)
  • Check for stored diagnostic trouble codes
  • Check for correct operation
B1D28-11 Fuel Pre-heater - circuit short to ground
NOTE: The pre heat is performed by the ignition glow plug
  • Fuel fired booster heater glow plug internal fault
B1D28-15 Fuel Pre-heater - circuit short to battery or open
NOTE: The pre heat is performed by the ignition glow plug
  • Fuel fired booster heater glow plug internal fault
B1D29-93 No Start, Even After Restart Attempt - no operation
  • No fuel present at fuel fired booster heater module
  • Exhaust system blocked
  • Air intake blocked
  • Check vehicle fuel level
  • Check fuel lines to fuel fired booster heater module for blockage, kinking or damage
  • Check exhaust system and air intake for blockage, kinking or damage
  • Check fuel for aeration and correct fuel delivery
  • Check vehicle is not parked on an incline when parking heater is operated
  • Using the manufacturer approved diagnostic system, record then clear any stored diagnostic trouble codes then conduct the fuel fired booster heater operation check  (Setup and configuration/auxiliary heater/operation check)
  • Check for stored diagnostic trouble codes
  • Check for correct operation
B1D30-93 No Start In Test Mode - no operation
  • No fuel present at fuel fired booster heater module
  • Exhaust system blocked
  • Air intake blocked
  • Check vehicle fuel level
  • Check fuel lines to Fuel fired booster heater module for blockage, kinking or damage
  • Check exhaust system and air intake for blockage, kinking or damage
  • Check fuel for aeration and correct fuel delivery
  • Check vehicle is not parked on an incline when parking heater is operated
  • Using the manufacturer approved diagnostic system, record then clear any stored diagnostic trouble codes then conduct the fuel fired booster heater operation check  (Setup and configuration/auxiliary heater/operation check)
  • Check for stored diagnostic trouble codes
  • Check for correct operation
B1D31-94 Flame Detected Prior to Normal Operation - unexpected operation
NOTE: The glow plug and flame sensor are a combined unit
  • Glow plug circuit fault
B1D32-92 Multiple Flame Interruption During Heating Cycle - performance or incorrect operation
  • No fuel present at fuel fired booster heater module
  • Exhaust system blocked
  • Air intake blocked
  • Check vehicle fuel level
  • Check fuel lines to Fuel fired booster heater module for blockage, kinking or damage
  • Check exhaust system and air intake for blockage, kinking or damage
  • Check fuel for aeration and correct fuel delivery
  • Check vehicle is not parked on an incline when parking heater is operated
  • Using the manufacturer approved diagnostic system, record then clear any stored diagnostic trouble codes then conduct the fuel fired booster heater operation check  (Setup and configuration/auxiliary heater/operation check)
  • Check for stored diagnostic trouble codes
  • Check for correct operation
B1D33-92 Flame Interruption During Normal Operation - performance or incorrect operation
  • No fuel present at fuel fired booster heater module
  • Exhaust system blocked
  • Air intake blocked
  • Check vehicle fuel level
  • Check fuel lines to Fuel fired booster heater module for blockage, kinking or damage
  • Check exhaust system and air intake for blockage, kinking or damage
  • Check fuel for aeration and correct fuel delivery
  • Check vehicle is not parked on an incline when parking heater is operated
  • Using the manufacturer approved diagnostic system, record then clear any stored diagnostic trouble codes then conduct the fuel fired booster heater operation check  (Setup and configuration/auxiliary heater/operation check)
  • Check for stored diagnostic trouble codes
  • Check for correct operation
B1D34-68 Heater In Lock Out Mode - event information
  • Fuel fired booster heater system fault
NOTE: For information only, rectify other stored fuel fired booster heater diagnostic trouble codes prior to this diagnostic trouble code
  • Using the manufacturer approved diagnostic system, record then clear any stored diagnostic trouble codes then conduct the fuel fired booster heater operation check  (Setup and configuration/auxiliary heater/operation check)
  • Check for stored diagnostic trouble codes
  • Check for correct operation
B1D63-11 External Control Relay - circuit short to ground
  • Fuel fired booster heater module failure
  • Check and install a new fuel fired booster heater module as required
  • Refer to the warranty policy and procedures manual, or determine if any prior approval programme is in operation, prior to the installation of a new module/component
B1D63-15 External Control Relay - circuit short to battery or open
  • Fuel fired booster heater module failure
  • Check and install a new fuel fired booster heater module as required
  • Refer to the warranty policy and procedures manual, or determine if any prior approval programme is in operation, prior to the installation of a new module/component
U0010-00 Medium Speed CAN Communication Bus - no sub type information
  • Medium speed CAN communication bus off
  • Using the manufacturer approved diagnostic system, complete a CAN network integrity test
U0028-08 Vehicle Communication Bus A - Bus Signal / Message Failures
  • Medium speed CAN communication bus off
  • Fuel fired booster heater module failure
  • Using the manufacturer approved diagnostic system, complete a CAN network integrity test
U0300-00 Internal Control Module Software Incompatibility - no sub type information
  • Fuel fired booster heater module not configured or incorrectly configured
  • Re-configure the fuel fired booster heater module using the manufacturer approved diagnostic system (Module programming/Configure existing module/Auxiliary heater control module)
U2101-00 Control Module Configuration Incompatible - no sub type information
  • Fuel fired booster heater module not configured or incorrectly configured
  • Central junction box not configured correctly
  • Using the manufacturer approved diagnostic system, record then clear any stored diagnostic trouble codes then conduct the fuel fired booster heater operation check  (Setup and configuration/auxiliary heater/operation check)
  • Check for reoccurrence of the diagnostic trouble code
  • If the diagnostic trouble code returns
  • Using the manufacturer approved diagnostic system check and up-date the car configuration file as required
  • Re-configure the Fuel fired booster heater module using the manufacturer approved diagnostic system
  • Check for stored diagnostic trouble codes
  • Check for correct operation
U3000-16 Control Module - circuit voltage below threshold
  • Fuel fired booster heater module power circuit fault
  • Battery/charging system fault
  • Check other modules for related diagnostic trouble codes
  • If other modules contain low voltage related diagnostic trouble codes, suspect a common cause (battery/charging system fault)
  • If not, refer to the electrical circuit diagrams and check the power and ground circuits to the fuel fired booster heater module
  • Check for stored diagnostic trouble codes
  • Check for correct operation
U3000-17 Control Module - circuit voltage above threshold
  • Charging system fault
  • Fuel fired booster heater module failure
  • Check other modules for related diagnostic trouble codes
  • If other modules contain high voltage related diagnostic trouble codes, suspect a common cause (battery/charging system fault)
  • If not, refer to the electrical circuit diagrams and check the power and ground circuits to the fuel fired booster heater module
  • Check for stored diagnostic trouble codes
  • Check for correct operation
U3000-43 Control Module - special memory failure
  • Fuel fired booster heater module failure
  • Using the manufacturer approved diagnostic system, record then clear any stored diagnostic trouble codes then conduct the fuel fired booster heater operation check  (Setup and configuration/auxiliary heater/operation check)
  • Check for reoccurrence of the diagnostic trouble code
  • If the diagnostic trouble code returns
  • Install a new fuel fired booster heater module as required
  • Refer to the warranty policy and procedures manual, or determine if any prior approval programme is in operation, prior to the installation of a new module/component
U3000-49 Control Module - internal electronic failure
  • Fuel fired booster heater module failure
  • Using the manufacturer approved diagnostic system, record then clear any stored diagnostic trouble codes then conduct the fuel fired booster heater operation check  (Setup and configuration/auxiliary heater/operation check)
  • Check for reoccurrence of the diagnostic trouble code
  • If the diagnostic trouble code returns
  • Install a new fuel fired booster heater module as required
  • Refer to the warranty policy and procedures manual, or determine if any prior approval programme is in operation, prior to the installation of a new module/component
U3003-62 Battery Voltage - signal compare failure
  • There is a difference of more than 2 volts between the power supply to the fuel fired booster heater and the battery voltage value broadcast via the CAN bus
  • Check other modules for related diagnostic trouble codes
  • If other modules contain voltage related diagnostic trouble codes, suspect a common cause (battery/charging system fault)
  • If not, refer to the electrical circuit diagrams and check the power and ground circuits to the fuel fired booster heater module