06奔驰维修案例

1、- No communications with the battery control unit -主题编号GI54.15-P-012348车型3 设计组54.15 Fuse and relay box 日期04-24-2007 有效性Model 211.#改变的原因Text revised投诉 Customer complaint: Implausible red fault message (Battery/alternator, locate workshop) is displayed in the instrument cluster. In the DAS quick test

2、the battery control unit (BCU, N82) is not detected and is marked in the quick test printoutwith a !.If this situation occurs, the BCU must not be replaced immediately, but the steps described in the remedy below must be applied first.原因 Under certain circumstances (battery exhausted, jump start) th

3、e software of the BCU mayhang, preventing the BCU from participating in CAN communications.As a result the red combination message Battery/alternator, locate workshop is displayed.In the DAS quick test this state is indicated by a ! by the BCU. Other control units (e.g. instrument cluster, SAM) also

4、 have the current or stored fault CAN communication with the BCU control unit is disrupted.修改 If the communication errors with the BCU listed above are current or stored, a circuit 30 reset of the BCU must be performed by disconnecting the plug at the control unit itself for at least 5minutes (cauti

5、on: switch off the ignition beforehand).- Operation number: 542306 Performing battery control unit reset, 2 WUThen perform the quick test again. If the battery control unit is now detected in the quick test,there is no defect in the battery control unit, but the problem is the abovesoftware crash. I

6、n other control units (e.g. IC, SAM), the circuit 30 reset of theBCU causes the displayed fault CAN communication with the BCU control unit is disrupted to change from current to stored.- Operation number: 541011 Performing quick test, 4 WUNote: This is no reason to replace the BCU because the BCU h

7、as executed a correct protection function and operates perfectly normally again after the circuit 30 reset. A new BSG would also behave exactly the same under the same conditions (battery deep discharge, starting aid).症状 症状Overall vehicle / Power supply / Battery / On-board electrical system / Batte

8、ry/on-board electrical system indicator lamp / Battery charge indicator/consumer shutoff / Illuminates redOverall vehicle / Power supply / Battery / On-board electrical system / Battery/on-board electrical system display message / Battery/Alternator - Serviced Required控制单元/故障代码 控制单元故障代码故障代码描述IC-Inst

9、rument cluster (KI4) 9123 Event:Fault in CAN communication with control unit Vehicle power supply control module. BCM-Battery control module (BSG2) 9040 Terminal 30: undervoltage Dr-side SAM-Driver signal acquisition and actuation module (SAMF3) 909A Event:Fault in CAN communication with control unit BCM. REAR SAM-Rear signal acquisition and actuation module (SAMH4