Mercedes EIS / EZS Fault

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Mercedes EIS / EZS Fault

Today we visited a customer just around the corner from us in between Aldeburgh and Leiston (suffolk). The customer was experiencing intermittent non starting , we first suspected a EIS fault when we had first spoken with the customer.

When we arrived we plugged in to the SLK via the OBD port, the SLK has the standard mercedes infared keys along with the EIS / EZS system that is part of the ignition system / steering lock. The code was intermittent but only with one key so re new the actual EIS / EZS (ignition lock / Switch) was working correctly.

The solution,

We reset the body control unit as a precaution, then we recoded and adapted the EIS / EZS unit. This was all done within an hour. All faults were cleared and the vehicle was retested for faults and this re test came back fault free.

mercedes diagnostic testing
mercedes diagnostic testing

Mercedes Specialists

We are independent mercedes specialists with the ability to code and programme control units as well as code variants and perform resets on most ECU’s and control units. We use an number of specialist diagnostic tools including mercedes star.

GEL Automotive

We are based in Aldebrugh, Suffolk but we provide a mobile service to Suffolk, Essex and Norfolk. We regularly visit the following areas with our fully mobile service.

  • Ipswich
  • Felixstowe
  • Diss
  • Saxmundham
  • Halesworth
  • Lowestoft
  • Bury St Edmunds
  • Colchester
  • Stowmarket
  • Great Yarmouth
  • Woodbridge

Full diagnostic fault report below

No. ID DTC Info Status 1 1 ME SFI-Motor electronics 2 203A-08 N3/10 (ME-SFI [ME] control unit) , Fault Stored 3 2009-02 M16/6 (Throttle valve actuator) Actual value potentiometer ,Return spring [P0120] Stored 4 201F-02 M4/7 (Engine and AC electric suction fan with integrated control) ,Short circuit to ground / Open circuit in wiring Stored 5 IC-Instrument cluster 6 9128 The supply voltage of the control unit is too low (undervoltage). Stored 7 9112 Fault in CAN communication with control unit REAR SAM. Stored 8 9118 Fault in CAN communication with control unit Dr-side SAM. Stored 9 EZS-Electronic ignition switch 10 9001 Undervoltage supply Stored 11 VR-Vario roof 12 9010 The supply voltage of the control unit is too low (undervoltage). The voltage was less than 8.5 V during 5 s. Stored 13 UCP-Upper control panel 14 9030 Control module UCP has detected a short circuit at one of the outputs for the switch lighting. Stored 15 9031 The supply voltage of control unit N72/1 (Upper control panel control unit) is too low (undervoltage). Stored 16 OCP-Overhead control panel 17 9001 The supply voltage of the control unit is too low (undervoltage). The voltage was less than 9.0 V during 3 s. Stored 18 SAM F-Signal acquisition and actuation module front 19 9017 The component or the signal line to the component E2e5 (Right turn signal lamp) has Short circuit or Open circuit. Stored 20 9044 Components S41 (Coolant level indicator switch) and S42 (Windshield washer fluid level indicator switch) have Open circuit. Stored 21 9036 The input signal ‘circuit 61’ is not o.k. Stored 22 9018 The component or the signal line to the component E1e5 (Left turn signal lamp) has Short circuit or Open circuit. Stored 23 9014 The component or the signal line to the component E1e3 (Left standing and parking lamp) has Short circuit or Open circuit. Stored 24 9050 Circuit 30 has an undervoltage of < 8 V. Stored 25 9051 Circuit 30 has an undervoltage of < 10,5 V. Stored 2 26 REAR SAM-Rear signal acquisition and actuation module 27 9056 The component or the signal line to the component E21 (Center high-mounted stop lamp) has Short circuit or Open circuit. Stored 28 9096 Control module N72/1 (Upper control panel control unit) is not sending any data. Stored 29 9057 The component or the signal line to the component E18/5 (Left trunk lamp) has Short circuit or Open circuit. Stored 30 9088 Control module N73 (EIS [EZS] control unit) is not sending any data. Stored 31 9037 Circuit 30 has an undervoltage of < 7.0 V. Stored 32 9038 Circuit 30 has an undervoltage of < 8.0 V. Stored 33 9039 Circuit 30 has an undervoltage of < 10.5 V. This fault is mainly listed when the engine is started. Low voltage only occurs when the fault is erased after engine is started and then appears again. Stored 34 PTS-Parktronic system 35 9042 At the control unit, the supply voltage for the warning elements is outside the permissible range. Stored 36 9091 System ‘Parktronic’ has detected a fault. Stored 37 9004 A42b2 (Left center sensor, front bumper):Sensor is faulty. Stored 38 9010 A42b6 (Right outer sensor, front bumper):Sensor is faulty. Stored 39 9016 A43b8 (Right inner sensor, rear bumper):Sensor is faulty. Stored 40 9008 A42b3 (Left inner sensor, front bumper):The sensor is not properly fastened/assembled or there is an obstacle near the sensor. Stored 41 900B A42b4 (Right inner sensor, front bumper):The sensor is not properly fastened/assembled or there is an obstacle near the sensor. Stored 42 9017 A43b8 (Right inner sensor, rear bumper):The sensor is not properly fastened/assembled or there is an obstacle near the sensor. Stored 43 901A A43b9 (Left inner sensor, rear bumper):The sensor is not properly fastened/assembled or there is an obstacle near the sensor. Stored 44 9059 Fault in CAN communication with control unit Upper control panel. Stored 45 DCM L-Door control module left 46 9010 The supply voltage of the control unit is too low (undervoltage). The voltage was less than 7.3 V during 1 s. Stored 47 9501 S20/1s1 (Left power window switch) : The component remains in the switched status (contact sticking) or has Short circuit. Stored 48 C AAC-Convenience automatic air conditioning/AAC-Automatic air conditioning/HEAT-Automatic heater 49 9202 Refrigerant pressure is too low. Check refrigerant level. B12 (Refrigerant pressure sensor) Stored 50 ASSYST PLUS-PLUS Active Service System 3 51 9102 Coding of control module ASSYST PLUS is faulty. Stored 52 AGW-Audio gateway (MOST network management, diagnosis gateway, radio tuner) 53 D010 The supply voltage of the control unit is too low (undervoltage). Stored 54 CTEL-Mobile phone adapter with universal interface 55 U1700 Please refer to vehicle service manual! Stored 56 U1703 Please refer to vehicle service manual! Stored 57 U1701 Please refer to vehicle service manual! Stored 58 D001 This message does not immediately result in replacement of component. Watchdog error : The control unit has been reset due to an internal error. Stored 59 CDC-CD changer 60 D700 CD load or eject error on CD drive 1 Stored 61 D703 CD load or eject error on CD drive 4 Stored 62 D701 CD load or eject error on CD drive 2 Stored 63 D001 Watchdog error : The control unit has been reset due to an internal error. Stored

Mercedes EIS / EZS Fault