SI Troubleshooting Erratic Instrument Cluster Functions
Contents
1. GROUP 62 62 02 00 Woodcliff Lake NJ June 2000 Instruments Service Engineering SUBJECT Troubleshooting Erratic Instrument Cluster Functions MODEL E46 3 Series SITUATION A low voltage condition on the K bus can cause erratic operation of instrument cluster functions Additional faults may be present as follows K bus FC 87 set in instrument cluster and radio disabled CAUSE Low voltage on K bus PROCEDURE 1 1 Disconnect the battery 2 Remove the 6 screws holding the glove box and remove the glove box 3 Drop down the fuse box to expose the JE sien Ras splice box 1 mounted above it ue i 4 F i Release the splice box by squeezing i the locking tabs 2 towards each aS other and sliding off towards the front 2 5 OT TF ve of the vehicle i 12 43 a i BE Ew lw TETI sina arinrin me mose oh N pee HH a T aie ny f N ua SI Troubleshooting Erratic Instrument Cluster Functions BMW AG TIS 21 08 2001 01 52 Issue status 05 2001 Valid only until next CD is issued Copyright Page 1 4 Locate the K bus splice assembly 1 wires colored White Red Yellow and remove it from the splice box 2 5 Remove the plastic cover 1 from the splice 2 6 Reconnect the battery switch on the ignition and confirm the low voltage at the splice 1 using a multimeter 2 Note that with a fully charged battery the K bus voltage should be greater than 11 0 volts 72. To remove a connector from the splice use a small screwdriver to raise the two locking tabs 1 before sliding the connector off SI Troubleshooting Erratic Instrument Cluster Functions BMW AG TIS 21 08 2001 01 52 Issue status 05 2001 Valid only until next CD is issued Copyright Page 2 WARRANTY INFORMATION BMW Diagnosis Vehicle Wentification Series Tus Model ZEN NMSUTU_SE9 Versien mG Model year ome te Vehicle bient mimber tenh Vehicle ogiprnani Drive 1 DME Regine Becirvies Ma4 08 Tranemdssive come CID DGS Traram tratce castrol 8 50 D 1 EMS Fectonis car tvewtitiviessven Chassis ASC Stabiy Contre MEJE Fay Cortes NEF MP MeRi torctias Steering viesi ROC Thee prevewre chess ri BPUFT NETE WOSE A 1 PSTN aetiching carder center comme Bedy WC torati leprae Comte MAT Mevigetion POC Park Dirhace Centre Taure a SPRETT Miro manoy pasesger EFA VID Wies Module Tast emea 10 Starting at one end of the splice remove the splice connector 1 and note the effect on the voltage at the multimeter 2 If the measured voltage is unchanged reconnect the splice connector 1 and remove the next connector in line 2 Continue this procedure removing and reconnecting each connector in turn until the connector is identified where the measured voltage returns to gt 11 0 volts with the connector removed This identifies the connector with the problem
3. circuit To identify the problem circuit using DIS or MoDiC run a Short Test with the problem connector still removed at the K bus splice Because the test is run without the problem wire connected it cannot be identified and will show as a blank instead of either or x see example 11 Continue diagnosis of the problem circuit identified in step 10 to locate and correct the root cause of the low voltage 12 Reinstall the splice components and glove box in reverse order 13 Recheck operation of the instrument cluster functions to confirm satisfactory operation For information only SI Troubleshooting Erratic Instrument Cluster Functions Issue status 05 2001 Valid only until next CD is issued BMW AG TIS Copyright 21 08 2001 01 52 Page 3
Download Pdf Manuals
Related Search