Central Electronic Module (CEM), Rear Electronic Module (Rem), Upper Electronics Module (UEM) - Diagnostic Trouble Codes - 7 Of 13

• CEM-5F4D: Diagnostic System. Too Long (B5234T3; B5244S; 2001-2004)
  • Diagnostic trouble code information
  • Too-long: time
    • Checking communication
    • Checking communication, continued
    • Verification
      • Verification
    • Description of parameters
      • Notes
      • Failed start attempts, value
      • Overheating incidents, value
      • Successful start attempts, value
      • Coolant temperature, value
      • Battery voltage, value
      • Heater run time, value
      • Additional heater status, value
      • Actual combustion fan speed, value
      • Derived combustion fan speed, value
      • Degree of modulation of combustion fan, value
      • Fuel pump frequency, value
      • Degree of modulation of Glow plug, value
      • Flame monitor, value
      • Extended X-supply, status
      • Supply voltage to components, status
      • Glow plug, status
      • Water pump, status
      • Fuel level, status
    • Activating components/functions
      • Activation of components
      • Glow plug
      • Heater fan
      • Fuel pump
      • Water pump
      • Heater
      • Component supply voltage
    • Information
      • Fault-tracing information
• CEM-5F4D: Diagnostic System. Too Long (B5244T3; 2001-2003)
  • Diagnostic trouble code information
  • Too-long: time
• CEM-5F4D: Diagnostic System. Too Long (B5254T2; 2003-2004)
  • Diagnostic trouble code information
  • Too-long: time
• CEM-5F4D: On-Board Diagnostic (OBD) System. Too Long Time (2005-2009)
  • Diagnostic trouble code (DTC) information CEM-5F4D
  • Too-long: time
    • Checking communication
    • Checking communication, continued
    • Verification
      • Verification
    • Information
      • Fault-tracing information
• CEM-5F4F: Start Attempt. Too Many Unsuccessful Attempts (2005-2009)
  • Diagnostic trouble code (DTC) information CEM-5F4F
  • Too-many: unsuccessful attempts
    • Checking the quantity of fuel and voltage
    • Checking fuel lines
    • Checking components
    • Checking the nozzle pipe
    • Checking the combustion air flow
    • Checking the flame sensor
    • Checking components and wiring
    • Verification
      • Verification
    • Information
      • Fault-tracing information
• CEM-5F4F: Start Attempt. Too Many Unsuccessful Attempts (B5204T5; B5254T4; 2004)
  • Diagnostic trouble code information
  • Too-many: unsuccessful attempts
    • Checking quantity of fuel and voltage
    • Checking the fuel lines
    • Checking components
    • Checking the nozzle pipe
    • Checking the intake air flow
    • Checking the flame sensor
    • Checking components and wiring
    • Verification
      • Verification
    • Information
      • Fault-tracing information
• CEM-5F4F: Start Attempt. Too Many Unsuccessful Attempts (B5234T3; B5244S; 2001-2004)
  • Diagnostic trouble code information
  • Too-many: unsuccessful attempts
• CEM-5F4F: Start Attempt. Too Many Unsuccessful Attempts (B5244T3; 2001-2003)
  • Diagnostic trouble code information
  • Too-many: unsuccessful attempts
• CEM-5F4F: Start Attempt. Too Many Unsuccessful Attempts (B5254T2; 2003-2004)
  • Diagnostic trouble code information
  • Too-many: unsuccessful attempts
• CEM-5F50: Overheat Protection Thermostat. Signal Too High (2005-2009)
  • Diagnostic trouble code (DTC) information CEM-5F50
  • Signal too high
    • Checking the water flow
    • Checking the engine coolant temperature sensor
    • Checking resistance of engine coolant temperature sensor
    • Checking components and wiring for contact resistance and oxidation
    • Verification
      • Verification
    • Information
      • Fault-tracing information
• CEM-5F50: Overheat Thermostat. Signal Too High (B5204T5; 2004)
  • Diagnostic trouble code information
  • Signal too high
    • Checking the water flow
    • Checking the engine coolant temperature sensor
    • Checking resistance of engine coolant temperature sensor
    • Checking components and wiring for contact resistance and oxidation
    • Verification
      • Verification
    • Information
      • Fault-tracing information
• CEM-5F50: Overheat Thermostat. Signal Too High (B5234T3; B5244S; 2001-2004)
  • Diagnostic trouble code information
  • Signal too high
• CEM-5F50: Overheat Thermostat. Signal Too High (B5244T3; 2001-2003)
  • Diagnostic trouble code information
  • Signal too high
• CEM-5F50: Overheat Thermostat. Signal Too High (B5254T2; 2003-2004)
  • Diagnostic trouble code information
  • Signal too high
• CEM-6A01: Rear Left Door Unlocked. Signal Too High. Intermittent Fault (2001-2004)
  • Diagnostic trouble code information
  • Signal too high. Intermittent fault
    • Checking the component
    • Checking the wiring and switches
    • Checking the door locking function
      • Question
    • Checking the driver door
      • Check
      • Checking the fuse
      • Checking window lift
      • Checking the fuse - left-hand drive
      • Checking the fuse - right-hand drive
      • Checking for an open circuit
      • Checking for a short circuit
      • Checking the voltage
      • Checking the locking motor wires
      • Replacing the lock unit
    • Checking the passenger door
      • Check
      • Checking the fuse
      • Checking window lift
      • Checking the fuse - right-hand drive
      • Checking the fuse - left-hand drive
      • Checking for an open circuit
      • Checking for a short circuit
      • Checking the voltage
      • Checking the locking motor wires
      • Replacing the lock unit
      • Replacing the control unit
    • Checking the rear left door
      • Check
      • Replacing the relays for locking
      • Circuit test
      • Circuit test, continued
      • Checking the locking relay circuit
      • Checking the unlocking relay circuit
      • Checking the components
      • Checking the relay supply
      • Checking the fuse
      • Checking for an open circuit
      • Checking for a short circuit
    • Checking the rear right door
      • Check
      • Replacing the relays for locking
      • Circuit test
      • Circuit test, continued
      • Checking the locking relay circuit
      • Checking the unlocking relay circuit
      • Checking the components
      • Checking the relay supply
      • Checking the fuse
      • Checking for an open circuit
      • Checking for a short circuit
• CEM-6A01: Rear Left Door Unlocked. Signal Too High. Permanent Fault (2001-2004)
  • Diagnostic trouble code information
  • Signal too high. Permanent fault
    • Checking the component
    • Checking the wiring and switches
    • Checking the door locking function
      • Question
    • Checking the driver door
      • Check
      • Checking the fuse
      • Checking window lift
      • Checking the fuse - left-hand drive
      • Checking the fuse - right-hand drive
      • Checking for an open circuit
      • Checking for a short circuit
      • Checking the voltage
      • Checking the locking motor wires
      • Replacing the relays for locking
      • Replacing the control unit
    • Checking the passenger door
      • Check
      • Checking the fuse
      • Checking window lift
      • Checking the fuse - right-hand drive
      • Checking the fuse - left-hand drive
      • Checking for an open circuit
      • Checking for a short circuit
      • Checking the voltage
      • Checking the locking motor wires
      • Replacing the lock unit
    • Replacing the switch for the lock unit / cargo compartment lighting
      • Removing lock unit
      • Installing lock unit
    • Lock mechanism for the rear side door, replacing
      • Notes
      • Removing the lock mechanism for the rear side door
      • Installing the lock mechanism for the rear side door
    • Checking the rear left door
      • Check
      • Replacing the relays for locking
      • Circuit test
      • Circuit test, continued
      • Checking the locking relay circuit
      • Checking the unlocking relay circuit
      • Checking the components
      • Checking the relay supply
      • Checking the fuse
      • Checking for an open circuit
      • Checking for a short circuit
    • Checking the rear right door
      • Check
      • Replacing the relays for locking
      • Circuit test
      • Circuit test, continued
      • Checking the locking relay circuit
      • Checking the unlocking relay circuit
      • Checking the components
      • Checking the relay supply
      • Checking the fuse
      • Checking for an open circuit
      • Checking for a short circuit
    • Verification
      • Verification
    • Information
      • Fault-tracing information
• CEM-6A02: Rear Right Door Unlocked. Signal Too High. Intermittent Fault (2001-2004)
  • Diagnostic trouble code information
  • Signal too high. Intermittent fault
    • Checking the component
    • Checking the wiring and switches
    • Checking the door locking function
      • Question
    • Checking the driver door
      • Check
      • Checking the fuse
      • Checking window lift
      • Checking the fuse - left-hand drive
      • Checking the fuse - right-hand drive
      • Checking for an open circuit
      • Checking for a short circuit
      • Checking the voltage
      • Checking the locking motor wires
      • Replacing the lock unit
      • Replacing the control unit
    • Checking the passenger door
      • Check
      • Checking the fuse
      • Checking window lift
      • Checking the fuse - right-hand drive
      • Checking the fuse - left-hand drive
      • Checking for an open circuit
      • Checking for a short circuit
      • Checking the voltage
      • Checking the locking motor wires
      • Replacing the lock unit
      • Replacing the control unit
    • Checking the rear left door
      • Check
      • Replacing the relays for locking
      • Circuit test
      • Circuit test, continued
      • Checking the locking relay circuit
      • Checking the unlocking relay circuit
      • Checking the components
      • Checking the relay supply
      • Checking the fuse
      • Checking for an open circuit
      • Checking for a short circuit
    • Checking the rear right door
      • Check
      • Replacing the relays for locking
      • Circuit test
      • Circuit test, continued
      • Checking the locking relay circuit
      • Checking the unlocking relay circuit
      • Checking the components
      • Checking the relay supply
      • Checking the fuse
      • Checking for an open circuit
      • Checking for a short circuit
• CEM-6A02: Rear Right Door Unlocked. Signal Too High. Permanent Fault (2001-2004)
  • Diagnostic trouble code information
  • Signal too high. Permanent fault
    • Checking the component
    • Checking the wiring and switches
    • Checking the door locking function
      • Question
    • Checking the driver door
      • Check
      • Checking the fuse
      • Checking window lift
      • Checking the fuse - left-hand drive
      • Checking the fuse - right-hand drive
      • Checking for an open circuit
      • Checking for a short circuit
      • Checking the voltage
      • Checking the locking motor wires
      • Replacing the lock unit
      • Replacing the control unit
    • Checking the passenger door
      • Check
      • Checking the fuse
      • Checking window lift
      • Checking the fuse - right-hand drive
      • Checking the fuse - left-hand drive
      • Checking for an open circuit
      • Checking for a short circuit
      • Checking the voltage
      • Checking the locking motor wires
      • Replacing the lock unit
      • Replacing the control unit
    • Checking the rear left door
      • Check
      • Replacing the relays for locking
      • Circuit test
      • Circuit test, continued
      • Checking the locking relay circuit
      • Checking the unlocking relay circuit
      • Checking the components
      • Checking the relay supply
      • Checking the fuse
      • Checking for an open circuit
      • Checking for a short circuit
    • Checking the rear right door
      • Check
      • Replacing the relays for locking
      • Circuit test
      • Circuit test, continued
      • Checking the locking relay circuit
      • Checking the unlocking relay circuit
      • Checking the components
      • Checking the relay supply
      • Checking the fuse
      • Checking for an open circuit
      • Checking for a short circuit
    • Verification
      • Verification
    • Information
      • Fault-tracing information
• CEM-6A03: Rear Left Door Locked. Signal Too Low. Intermittent Fault (2001-2004)
  • Diagnostic trouble code (DTC) information
  • Signal too low. Intermittent fault
    • Checking the component
    • Checking the wiring and switches
    • Checking the door locking function
      • Question
    • Checking the driver door
      • Check
      • Checking the fuse
      • Checking window lift
      • Checking the fuse - left-hand drive
      • Checking the fuse - right-hand drive
      • Checking for an open circuit
      • Checking for a short circuit
      • Checking the voltage
      • Checking the locking motor wires
      • Replacing the lock unit
      • Replacing the control unit
    • Checking the passenger door
      • Check
      • Checking the fuse
      • Checking window lift
      • Checking the fuse - right-hand drive
      • Checking the fuse - left-hand drive
      • Checking for an open circuit
      • Checking for a short circuit
      • Checking the voltage
      • Checking the locking motor wires
      • Replacing the lock unit
      • Replacing the control unit
    • Checking the rear left door
      • Check
      • Replacing the relays for locking
      • Circuit test
      • Circuit test, continued
      • Checking the locking relay circuit
      • Checking the unlocking relay circuit
      • Checking the components
      • Checking the relay supply
      • Checking the fuse
      • Checking for an open circuit
      • Checking for a short circuit
    • Checking the rear right door
      • Check
      • Replacing the relays for locking
      • Circuit test
      • Circuit test, continued
      • Checking the locking relay circuit
      • Checking the unlocking relay circuit
      • Checking the components
      • Checking the relay supply
      • Checking the fuse
      • Checking for an open circuit
      • Checking for a short circuit
• CEM-6A03: Rear Left Door Locked. Signal Too Low. Permanent Fault (2001-2004)
  • Diagnostic trouble code (DTC) information
  • Signal too low. Permanent fault
    • Checking the component
    • Checking the wiring and switches
    • Checking the door locking function
      • Question
    • Checking the driver door
      • Check
      • Checking the fuse
      • Checking window lift
      • Checking the fuse - left-hand drive
      • Checking the fuse - right-hand drive
      • Checking for an open circuit
      • Checking for a short circuit
      • Checking the voltage
      • Checking the locking motor wires
      • Replacing the lock unit
      • Replacing the control unit
    • Checking the passenger door
      • Check
      • Checking the fuse
      • Checking window lift
      • Checking the fuse - right-hand drive
      • Checking the fuse - left-hand drive
      • Checking for an open circuit
      • Checking for a short circuit
      • Checking the voltage
      • Checking the locking motor wires
      • Replacing the lock unit
      • Replacing the control unit
    • Checking the rear left door
      • Check
      • Replacing the relays for locking
      • Circuit test
      • Circuit test, continued
      • Checking the locking relay circuit
      • Checking the unlocking relay circuit
      • Checking the components
      • Checking the relay supply
      • Checking the fuse
      • Checking for an open circuit
      • Checking for a short circuit
    • Checking the rear right door
      • Check
      • Replacing the relays for locking
      • Circuit test
      • Circuit test, continued
      • Checking the locking relay circuit
      • Checking the unlocking relay circuit
      • Checking the components
      • Checking the relay supply
      • Checking the fuse
      • Checking for an open circuit
      • Checking for a short circuit
    • Verification
      • Verification
    • Information
      • Fault-tracing information
• CEM-6A04: Rear Right Door Locked. Signal Too Low. Intermittent Fault (2001-2004)
  • Diagnostic trouble code information
  • Signal too low. Intermittent fault
    • Checking the component
    • Checking the wiring and switches
    • Checking the door locking function
      • Question
    • Checking the driver door
      • Check
      • Checking the fuse
      • Checking window lift
      • Checking the fuse - left-hand drive
      • Checking the fuse - right-hand drive
      • Checking for an open circuit
      • Checking for a short circuit
      • Checking the voltage
      • Checking the locking motor wires
      • Replacing the lock unit
      • Replacing the control unit
    • Checking the passenger door
      • Check
      • Checking the fuse
      • Checking window lift
      • Checking the fuse - right-hand drive
      • Checking the fuse - left-hand drive
      • Checking for an open circuit
      • Checking for a short circuit
      • Checking the voltage
      • Checking the locking motor wires
      • Replacing the lock unit
      • Replacing the control unit
    • Checking the rear left door
      • Check
      • Replacing the relays for locking
      • Circuit test
      • Circuit test, continued
      • Checking the locking relay circuit
      • Checking the unlocking relay circuit
      • Checking the components
      • Checking the relay supply
      • Checking the fuse
      • Checking for an open circuit
      • Checking for a short circuit
    • Checking the rear right door
      • Check
      • Replacing the relays for locking
      • Circuit test
      • Circuit test, continued
      • Checking the locking relay circuit
      • Checking the unlocking relay circuit
      • Checking the components
      • Checking the relay supply
      • Checking the fuse
      • Checking for an open circuit
      • Checking for a short circuit
• CEM-6A04: Rear Right Door Locked. Signal Too Low. Permanent Fault (2001-2004)
  • Diagnostic trouble code information
  • Signal too low. Permanent fault
    • Checking Component, Wiring And Switches
      • Checking Lock Unit
      • Checking Wiring And Switches
    • Checking Door Locking Function
      • Question
    • Checking Driver Door
      • Check Passenger Door Lock
      • Checking Fuse 11C/27
      • Checking Locking Motor Wires And Fuse
      • Checking According To Left Or Right Hand Drive
      • Checking Fuse 11C/35
      • Checking Fuse 11C/36
      • Checking For An Open Circuit
      • Checking For A Short Circuit
      • Checking Voltage
      • Checking Locking Motor Wires
      • Replacing Lock Unit
      • Replacing Control Unit
    • Checking Passenger Door
      • Check Driver Door Lock
      • Checking Fuse 11C/27
      • Check Window Lift
      • Checking According To Left Or Right Hand Drive
      • Checking Fuse 11C/35
      • Checking Fuse 11C/3
      • Checking For An Open Circuit
      • Checking For A Short Circuit
      • Checking Voltage
      • Checking Locking Motor Wires
      • Replacing Lock Unit
      • Replacing Control Unit
    • Checking Rear Left Door
      • Check Rear Left Door Lock
      • Replacing Relays For Locking (2/111) And Unlocking (2/112)
      • Circuit Test
      • Circuit Test, Continued
      • Checking Locking Relay Circuit
      • Checking Unlocking Relay Circuit
      • Checking Components
      • Checking Relay Supply
      • Checking Fuse 11D/8
      • Checking For An Open Circuit
      • Checking For A Short Circuit
    • Checking Rear Right Door
      • Check Rear Right Door Lock
      • Replacing Relays For Locking (2/113) And Unlocking (2/114)
      • Circuit Test
      • Circuit Test, Continued
      • Checking Locking Relay Circuit
      • Checking Unlocking Relay Circuit
      • Checking Components
      • Checking Relay Supply
      • Checking Fuse 11D/8
      • Checking For An Open Circuit
      • Checking For A Short Circuit
    • Verification
      • Verification
    • Information
      • Fault-Tracing Information
• Diagnostic Testing Procedures
  • Inspect terminals visually
  • Open-circuit, intermittent faults
  • Open-circuit, permanent faults
  • Short-circuit to ground, intermittent faults
  • Short-circuit to ground, permanent faults
  • Short-circuit to supply voltage, intermittent faults
  • Short-circuit to supply voltage, permanent faults
  • Loose connections (terminals)
  • Contact resistance and oxidation