Frelander 2. Manual — part 15
DTC
Description
Possible Cause
Action
U3000-98 Control module
Component or system over
temperature
Check for additional DTCs and refer to relevant DTC Index,
check/monitor system for re-occurrence
U3003-62 Battery voltage
Mis-match in voltage, of 2
volts or more, between
integrated control module
and CJB
Carry out pinpoint tests associated with this DTC using the
manufacturer approved diagnostic system
General Information - Diagnostic Trouble Code (DTC) IndexDTC: Auxiliary
Heater Control Module (AHCM)
Description and Operation
• NOTE: If a control module or component is suspect and the vehicle remains under manufacturer warranty, refer to the
Warranty Policy and Procedures manual (section B1.2), or determine if any prior approval program is in operation, before
the replacement of a component.
• NOTE: Generic scan tools may not read the codes listed, or may read only 5-digit codes. Match the 5 digits from the scan
tool to the first 5 digits of the 7-digit code listed to identify the fault (the last 2 digits give extra information read by the
manufacturer-approved diagnostic system).
• NOTE: When performing voltage or resistance tests, always use a digital multimeter (DMM) accurate to three decimal
places, and with an up-to-date calibration certificate. W hen testing resistance always take the resistance of the DMM
leads into account.
• NOTE: Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.
• NOTE: Inspect connectors for signs of water ingress, and pins for damage and/or corrosion.
• NOTE: If DTCs are recorded and, after performing the pinpoint tests, a fault is not present, an intermittent concern may
be the cause. Always check for loose connections and corroded terminals.
Description And Operation
For a detailed description of the fuel fired booster heater contol system, refer to the relevant Description and Operation
section in the workshop manual.
For additional information, refer to:
Fuel Fired Booster Heater
(412-02B Auxiliary Climate Control, Description and
Operation).
• NOTE: Where an 'on demand self-test' is referred to, this can be accessed via the 'DTC Monitor' tab on the manufacturers
approved diagnostic system.
DTC
Description
Possible Causes
Action
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 test (Setup and
configuration/auxiliary heater/operation test)
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 test (Setup and
configuration/auxiliary heater/operation test)
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 test (Setup and
configuration/auxiliary heater/operation test)
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
Carry out circuit checks, inspect the glow plug
cables and connector. Repair the circuit or check
and install a new fuel fired booster heater glow
plug as required For additional information,
refer to:
Fuel Fired Booster Heater Glow Plug
And Burner Assembly
(412-02B Auxiliary Climate
Control, Removal and Installation).
Using the manufacturer approved diagnostic
system, record then clear any stored diagnostic
trouble codes then conduct the fuel fired
booster heater operation test (Setup and
configuration/auxiliary heater/operation test)
Check for stored diagnostic trouble codes
Check for correct operation
DTC
Description
Possible Causes
Action
B1D24-15 Glow Plug - circuit
short to battery or
open
Fuel fired booster heater
glow plug internal fault
Carry out circuit checks, inspect the glow plug
cables and connector. Repair the circuit or check
and install a new fuel fired booster heater glow
plug as required For additional information,
refer to:
Fuel Fired Booster Heater Glow Plug
And Burner Assembly
(412-02B Auxiliary Climate
Control, Removal and Installation).
Using the manufacturer approved diagnostic
system, record then clear any stored diagnostic
trouble codes then conduct the fuel fired
booster heater operation test (Setup and
configuration/auxiliary heater/operation test)
Check for stored diagnostic trouble codes
Check for correct operation
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
For additional information, refer to:
Fuel Fired
Booster Heater Fuel Pump
(412-02B Auxiliary
Climate Control, Removal and Installation).
Using the manufacturer approved diagnostic
system, record then clear any stored diagnostic
trouble codes then conduct the fuel fired
booster heater operation test (Setup and
configuration/auxiliary heater/operation test)
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
For additional information, refer to:
Fuel Fired
Booster Heater Fuel Pump
(412-02B Auxiliary
Climate Control, Removal and Installation).
Using the manufacturer approved diagnostic
system, record then clear any stored diagnostic
trouble codes then conduct the fuel fired
booster heater operation test (Setup and
configuration/auxiliary heater/operation test)
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 test (Setup and
configuration/auxiliary heater/operation test)
If the diagnostic trouble code reoccurs check
and install a new fuel fired booster heater
module as required
For additional information, refer to:
Fuel Fired
Booster Heater
(412-02B Auxiliary Climate
Control, Removal and Installation).
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 test (Setup and
configuration/auxiliary heater/operation test)
If the diagnostic trouble code reoccurs check
and install a new fuel fired booster heater
module as required
For additional information, refer to:
Fuel Fired
Booster Heater
(412-02B Auxiliary Climate
Control, Removal and Installation).
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 test (Setup and
configuration/auxiliary heater/operation test)
DTC
Description
Possible Causes
Action
Check for reoccurrence of the diagnostic trouble
code
If the diagnostic trouble code reoccurs check
and install a new fuel fired booster heater
module as required
For additional information, refer to:
Fuel Fired
Booster Heater
(412-02B Auxiliary Climate
Control, Removal and Installation).
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 test (Setup and
configuration/auxiliary heater/operation test)
Check for reoccurrence of the diagnostic trouble
code
If the diagnostic trouble code reoccurs check
and install a new fuel fired booster heater
module as required
For additional information, refer to:
Fuel Fired
Booster Heater
(412-02B Auxiliary Climate
Control, Removal and Installation).
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
For additional information, refer to:
Fuel Fired
Booster Heater Coolant Pump
(412-02B
Auxiliary Climate Control, Removal and
Installation).
Using the manufacturer approved diagnostic
system, record then clear any stored diagnostic
trouble codes then conduct the fuel fired
booster heater operation test (Setup and
configuration/auxiliary heater/operation test)
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
For additional information, refer to:
Fuel Fired
Booster Heater Coolant Pump
(412-02B
Auxiliary Climate Control, Removal and
Installation).
Using the manufacturer approved diagnostic
system, record then clear any stored diagnostic
trouble codes then conduct the fuel fired
booster heater operation test (Setup and
configuration/auxiliary heater/operation test)
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
Carry out circuit checks, inspect the glow plug
cables and connector
Check and install a new fuel fired booster
heater glow plug as required For additional
information, refer to:
Fuel Fired Booster Heater
Glow Plug And Burner Assembly
(412-02B
Auxiliary Climate Control, Removal and
Installation).
Using the manufacturer approved diagnostic
system, record then clear any stored diagnostic
trouble codes then conduct the fuel fired
booster heater operation test (Setup and
configuration/auxiliary heater/operation test)
Check for stored diagnostic trouble codes
Check for correct operation
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