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Control Module And Output Signals

DTC Error Message Diagnostic Procedure Malfunction Criteria and Threshold Value Secondary Parameters with Enable Conditions Monitoring Time Length Frequency of checks, MIL Illum
P0601 Internal Control Module Memory Check Sum Error -- Replace the Motronic Engine Control Module (ECM) -J623-. Refer to appropriate service information. Internal check sum, incorrect --- ---
  • Continuous
  • 2 DCY
P0604 Internal Control Module Random Access Memory (RAM) Error -- Replace the Motronic Engine Control Module (ECM) -J623-. Refer to appropriate service information. Write ability check, failed --- ---
  • Continuous
  • 2 DCY
P0605 Internal Control Module Read Only Memory (ROM) Error -- Replace the Motronic Engine Control Module (ECM) -J623-. Refer to appropriate service information. Checksum Incorrect --- ---
  • Continuous
  • 2 DCY
P0606 CAN: Internal Fault -- Replace the Motronic Engine Control Module (ECM) -J623-. Refer to appropriate service information. RAM errormemory checksum error initialization phase time after ignition on500 mSec 0 mSec
  • Once/DCY
  • 2 DCY
P0606 ECM Processor -- Replace the Motronic Engine Control Module (ECM) -J623-. Refer to appropriate service information.
  • function monitoring: WDAgeneral causefailure
  • function monitoring: WDAinternal checkfailure
  • function monitoring: WDAovervoltage detectionfailure
  • EEPROM checkcheckfailed
  • internal hardware check (electrical adjustment communication, voltage supply)check
 ---
  • 0.5 Sec
  • Continuous
  • 2 DCY
P0606 ECM: 5V Supply Voltage -- Replace the Motronic Engine Control Module (ECM) -J623-. Refer to appropriate service information.
  • internal hardware checkunder-/ overvoltage detection
 ---
  • 0.5 Sec
  • Continuous
  • 2 DCY
P0606 ECM: A/D converter -- Replace the Motronic Engine Control Module (ECM) -J623-. Refer to appropriate service information.
  • power-up calibration checkfailed
  • adc-cannel conversioncheckfailed
  • initialization phaseactive
  • power-up calibrationexecuted
  • 0.5 Sec
  • Continuous
  • 2 DCY
P0606 ECM: A/D converter 2 -- Replace the Motronic Engine Control Module (ECM) -J623-. Refer to appropriate service information.
  • power-up calibration checkfailed
  • adc-cannel conversioncheckfailed
  • initialization phaseactive
  • power-up calibrationexecuted
  • 0.5 Sec
  • Continuous
  • 2 DCY
P0627 Fuel Pump "A" Control Circuit /Open -- Check the fuel pressure --. Refer to FUEL PRESSURE TEST .
  • Internal error fuel pump control unit
  • Feedback from fuel pump control unit Pump blocked short circuit to battery +, ground or open circuit
  • Battery voltage, > 9-16 V
  • Engine start, Completed
 15 Sec
  • No Mil
P0638 Throttle Actuator Control Range/Performance - Bank 1 -- Check the Throttle Valve Control Module -J338-. Refer to THROTTLE VALVE CONTROL MODULE, CHECKING . Rationality check:
  • Time to close to reference point > 0.6 Sec.
  • AND
  • reference point, 2.88%
Rationality check:
  • time to open over reference point> 0.1 Sec
  • OR
  • time to close below reference point> 0.6 Sec
signal range check @ mechanical stop low
  • TPS 1 signal voltageNOT (0.40...0.80) V
  • OR
  • TPS 2 signal voltageNOT (4.20...4.60)
 Case 1:
  • Ignition, on
  • Engine speed, 0 RPM
  • IAT, >5° C
  • Vehicle speed, 0 km/h
  • ECT, >5° C
Case 2:
  • engine shut-off-time0.5 Sec
  • Ignition, on
  • Engine speed, <= 300 RPM
  • IAT, >5...143° C
  • Vehicle speed, <= 0 km/h
  • ECT, >5...115° C
  • Ignition, on
  • Engine speed, <= 300 RPM
  • IAT, >5...143° C
  • Vehicle speed, <= 0 km/h
  • ECT, >5...115° C
  • 5 Sec
  • 5 Sec
  • 0.3 Sec
  • multiple
  • 2 DCY
P0641 Sensor Reference Voltage A Circuit/Open -- Replace the Motronic Engine Control Module (ECM) -J623-. Refer to appropriate service information. signal voltage, deviation > +/- 0.3 V --- 0.5 Sec
  • Continuous
  • 2 DCY
P0642 Sensor Reference Voltage A Circuit Low -- Replace the Motronic Engine Control Module (ECM) -J623-. Refer to appropriate service information. Signal voltage, < 4.6-5 V Threshold values depending on internal 5 V rev voltage 0.5 Sec
  • 2 DCY
P0643 Sensor Reference Voltage A Circuit High -- Replace the Motronic Engine Control Module (ECM) -J623-. Refer to appropriate service information. 5 V supply voltage >4.99-5.41 V Threshold values depending on internal 5 V rev voltage 0.5 Sec
  • 2 DCY
P0651 Sensor Reference Voltage B Circuit/Open -- Replace the Motronic Engine Control Module (ECM) -J623-. Refer to appropriate service information. signal voltage, deviation > +/- 0.3 V --- 0.5 Sec
  • Continuous
  • 2 DCY
P0652 Sensor Reference Voltage B Circuit Low -- Replace the Motronic Engine Control Module (ECM) -J623-. Refer to appropriate service information. Signal voltage, < 4.6-5 V Threshold values depending on internal 5 V rev voltage 0.5 Sec
  • 2 DCY
P0653 Sensor Reference Voltage B Circuit High -- Replace the Motronic Engine Control Module (ECM) -J623-. Refer to appropriate service information. 5 V supply voltage >4.99-5.41 V Threshold values depending on internal 5 V rev voltage 0.5 Sec
  • 2 DCY
P0657 Actuator Supply Voltage A Circuit / Open -- Check the Motronic Engine Control Module (ECM) Power Supply Relay -J271-. Refer to VOLTAGE SUPPLY, CHECKING . Signal voltage, 4.40...5.60 V
  • Relay, commanded off
  • Engine speed, > 80 RPM
 0.5 Sec
  • Continuous
  • 2 DCY
P0658 Actuator Supply Voltage A Circuit Low -- Check the Motronic Engine Control Module (ECM) Power Supply Relay -J271-. Refer to VOLTAGE SUPPLY, CHECKING . Signal voltage, < 2.15...3.25 V
  • Relay, commanded off
  • Engine speed, > 80 RPM
 0.5 Sec
  • Continuous
  • 2 DCY
P0659 Actuator Supply Voltage "A" Circuit High -- Check the Motronic Engine Control Module (ECM) Power Supply Relay -J271-. Refer to VOLTAGE SUPPLY, CHECKING . Signal current >1.10 A
  • Relay, commanded on
  • Engine speed, >80 RPM
 0.5 Sec
  • Continuous
  • 2 DCY
P0685 ECM/PCM Power Relay Control Circuit/Open -- Check the Motronic Engine Control Module (ECM) Power Supply Relay -J271-. Refer to VOLTAGE SUPPLY, CHECKING .
  • Signal voltage, 2.6-3.7 V
  • Sense circuit voltage, >6 V
 ECM keep alive time main relay, Commanded on (Test pulse) 0.5 Sec
  • 2 DCY
P0686 ECM/PCM Power Relay Control Circuit Low -- Check the Motronic Engine Control Module (ECM) Power Supply Relay -J271-. Refer to VOLTAGE SUPPLY, CHECKING .
  • Signal voltage, 2.6-3.7 V
  • Sense circuit voltage, >6 V
 ECM keep alive time main relay, Commanded on (Test pulse) 0.5 Sec
  • 2 DCY
P0687 ECM/PCM Power Relay Control Circuit High -- Check the Motronic Engine Control Module (ECM) Power Supply Relay -J271-. Refer to VOLTAGE SUPPLY, CHECKING .
  • Signal current, >1.4-0.7 A
  • Sense circuit voltage, <6 V
  • Main relay, Commanded on
  • ECM keep alive time main relay, Commanded on (Test pulse)
 0.5 Sec
  • 2 DCY
P0688 ECM/PCM Power Relay Sense Circuit -- Check the Motronic Engine Control Module (ECM) Power Supply Relay -J271-. Refer to VOLTAGE SUPPLY, CHECKING .
  • Sense voltage, <3.0 V
  • Difference sense circuit voltage with camshaft actuator commanded off and on >2.5 V
  • Battery voltage > 3 V
  • Main relay, commanded on
  • ECM keep alive time
  • Switch off test - Failed
  • 1 Sec
  • 4 Sec
  • 2 Sec
  • 2 DCY
P0697 Sensor Reference Voltage C Circuit / Open -- Replace the Motronic Engine Control Module (ECM) -J623-. Refer to appropriate service information. signal voltage, deviation > +/- 0.3 V --- 0.5 Sec
  • Continuous
  • 2 DCY
P0698 Sensor Reference Voltage C Circuit Low -- Replace the Motronic Engine Control Module (ECM) -J623-. Refer to appropriate service information. Signal voltage, < 4.6-5 V Threshold values dep. on internal 5 V rev voltage 0.4 Sec
  • 2 DCY
P0699 Sensor Reference Voltage C Circuit High -- Replace the Motronic Engine Control Module (ECM) -J623-. Refer to appropriate service information. 5 V supply voltage>4.99-5.41 V Threshold values dep. on internal 5 V rev voltage 0.4 Sec
  • 2 DCY
P062B Injection Valves Communication -- Check the Fuel injectors -N30, N31, N32, N33-. Refer to FUEL INJECTORS, CHECKING . internal logicfailure engine speed> 80 RPM 0.5 Sec
  • Continuous
  • 2 DCY


DTC Error Message Diagnostic Procedure Malfunction Criteria and Threshold Value Secondary Parameters with Enable Conditions Monitoring Time Length Frequency of checks, MIL Illum
U0001 High Speed CAN Communication Bus -- Check the CAN-Bus terminal resistance. Refer to CAN BUS TERMINAL RESISTANCE, CHECKING . CAN message, No feedback
  • time after ignition on, 500 mSec
 250 mSec
  • continuous
  • 2 DCY
U0002 High Speed CAN Communication Bus -- Check the CAN-Bus terminal resistance. Refer to CAN BUS TERMINAL RESISTANCE, CHECKING . Global time out, receiving no message.
  • time after ignition on, 500 mSec
 450 mSec
  • continuous
  • 2 DCY
U0100 Lost Communication with ECM/PCM A -- Check the CAN-Bus terminal resistance. Refer to CAN BUS TERMINAL RESISTANCE, CHECKING .
  • Failure of all CAN engine messages, Time out more than 490 mSec
  • Failure of all CAN engine messages but not all CAN messages, Time out more than 1010 mSec
  • No bus off error
  • No error failure of all CAN messages
  • No error failure of all CAN engine messages
  • Terminal 15 Voltage, > 9 V for more than 500 mSec
  • > 500 mSec after reset
 1 Sec ---
U0101 Lost Communication with TCM -- Check the CAN-Bus terminal resistance, Direct Shift Gearbox (DSG) Mechatronic -J743- to Motronic Engine Control Module (ECM) - J623-. Refer to CAN BUS TERMINAL RESISTANCE, CHECKING . CAN communication with TCM
  • Time out check No message received by ECM
  • time after ignition on, 500 mSec
 500 mSec
  • continuous
  • 2 DCY
U0121 CAN ABS brake unit -- Check the CAN-Bus terminal resistance. Refer to CAN BUS TERMINAL RESISTANCE, CHECKING . CAN communication with brake unit, time-out
  • time after ignition on, 500mSec
 440 mSec
  • continuous
  • 2 DCY
U0140 CAN communication with Body Control Modul -- Check the CAN-Bus terminal resistance. Refer to CAN BUS TERMINAL RESISTANCE, CHECKING . received CAN message-no message time after ignition on500 mSec 1000 mSec
  • continuous
  • 2 DCY
U0146 CAN gateway A -- Check the CAN-Bus terminal resistance. Refer to CAN BUS TERMINAL RESISTANCE, CHECKING . CAN communication with gateway, time-out time after ignition on500 mSec 1000 mSec
  • 2 DCY
U0155 CAN: Instrument Cluster -- Check the CAN-Bus terminal resistance. Refer to CAN BUS TERMINAL RESISTANCE, CHECKING . received CAN message-no message time after ignition on500 mSec 500 mSec
  • continuous
  • 2 DCY
U0302 Software Incompatibility with Transmission Control Module -- Replace the Direct Shift Gearbox (DSG) Mechatronic -J743-. Refer to appropriate service information. AT vehicle ECM coded as MT vehicle
  • time after ignition on, 500 mSec
 100 mSec
  • continuous
  • 2 DCY
U0323 CAN: Instrument cluster Audi only -- Check the CAN-Bus terminal resistance. Refer to CAN BUS TERMINAL RESISTANCE, CHECKING . ambient temp value module not encoded for ambient temp sensor, 00h
  • key on
  • status ambient temp from instrument cluster, no fault
 2 Sec
  • multiple
  • 2 DCY
U0402 CAN communication with TCM -- Check the CAN-Bus terminal resistance, Selector Lever -E313- to Motronic Engine Control Module (ECM) - J623- Data length code transmitted, incorrect
  • time after ignition on, 500 mSec
 300 mSec
  • Continuous
  • 2 DCY
U0404 Invalid Data Received From Gear Shift Control Module -- Check the CAN-Bus terminal resistance, Selector Lever -E313- to Motronic Engine Control Module (ECM) - J623-.
  • If the value of message counter is permanent, constant, or change exceeds a threshold, increment an event counter
  • maximum change of message counter > 5
  • No failure of selector lever CAN messages
  • Terminal 15 voltage > 4 V for more than 500 mSec
 50 mSec
  • Continuous
  • 2 DCY
U0415 CAN: ABS brake unit -- Check the CAN-Bus terminal resistance. Refer to CAN BUS TERMINAL RESISTANCE, CHECKING .-- Check ABS control unit. Refer to appropriate service information.
  • received data: implausible message
  • time after ignition on: 500 mSec
  • 60mSec
  • Continuous
  • 2 DCY
U0422 CAN: Instrument cluster -- Check the CAN-Bus terminal resistance. Refer to CAN BUS TERMINAL RESISTANCE, CHECKING . ambient temp. value (initialization), Audi, 01h
  • key on
  • status ambient temp from instrument cluster no fault
  • electrical check ambient temp. sensor, no fault
 3.0 Sec
  • multiple
  • 2 DCY
U0423 CAN: Instrument Cluster -- Check the CAN-Bus terminal resistance. Refer to CAN BUS TERMINAL RESISTANCE, CHECKING . received CAN message:implausible message time after ignition on500 mSec 500 mSec
  • Continuous
  • 2 DCY
U0447 CAN gateway -- Check the CAN-Bus terminal resistance. Refer to CAN BUS TERMINAL RESISTANCE, CHECKING . CAN message, incorrect time after ignition on500 mSec 300 mSec
  • Continuous
  • 2 DCY
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