DTC
Description
Possible Causes
Action
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
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
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 test (Setup and
configuration/auxiliary heater/operation test)
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 test (Setup and
configuration/auxiliary heater/operation test)
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
Check exhaust system and air intake for
blockage, kinking or damage
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
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 test (Setup and
configuration/auxiliary heater/operation test)
Check for stored diagnostic trouble codes
Check for correct operation