Signal Too High. Intermittent Fault.
Signal too high. Intermittent fault.
Checking connectors and bus wire
Note! Remember that the CAN network is only a communications network. There are therefore no fuses, switches and sensors on the CAN bus. Check the resistance as described below (see references).
Note! To maintain the correct values the battery should be disconnected when measuring resistance.
Check the bus wire for a short circuit to voltage supply as described in Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults and for an intermittent open circuit as described in Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
When checking for an open circuit, check if possible from the rear of the connector concerned so that it is not damaged.
Also check the intermediate connectors for contact resistance and oxidation as described in Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults and for a loose contact as described in Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Hint: If the fault is found before all the wires below have been checked trouble-shooting is not necessary on the wires.
The following wires and connectors should be checked to locate the short circuit.
Wire between:
- road traffic information module (RTI) 22A and rear electronic module (REM) 17A.
To connect the test box to the RTI control unit, see Connecting the breakout box to the Road Traffic Information (RTI) control module Connecting the Breakout Box to the Road Traffic Information (RTI) Control Module
To connect the test box to the REM control unit, see Connecting the breakout box Connecting Breakout Box, Rear Electronic Module (REM).
- rear electronic module (REM) 16A, driver information module (DIM) 9 and intermediate connector 54/40.
To connect the test box to the REM control unit, see Connecting the breakout box Connecting Breakout Box, Rear Electronic Module (REM).
To connect the test box to the DIM control unit, see Connecting the Driver Information Module (DIM) test box Connecting the Breakout Box.
- central electronic module (CEM) 2D and driver information module (DIM) 9.
To connect the test box to the CEM control unit, see Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM).
To connect the test box to the DIM control unit, see Connecting the Driver Information Module (DIM) test box Connecting the Breakout Box.
- power seat module (PSM) 3B and driver information module (DIM) 9.
To connect the test box to the PSM control unit, see Connecting the breakout box, power seat module (PSM) Connecting the Breakout Box, Power Seat Module (PSM).
To connect the test box to the DIM control unit, see Connecting the Driver Information Module (DIM) test box Connecting the Breakout Box
- driver information module (DIM) 3 and climate control module (CCM) 12A.
To connect the test box to the DIM control unit, see Connecting the Driver Information Module (DIM) test box Connecting the Breakout Box
To connect the test box to the CCM control unit, see Connecting the breakout box Connecting the Breakout Box, Supplemental Restraint System Module (SRS)
- audio module (AUM) 8A and climate control module (CCM) 12A.
To connect the test box to the AUM control unit, see Connecting the breakout box, Audio control module Connecting the Breakout Box
To connect the test box to the CCM control unit, see Connecting the breakout box Connecting the Breakout Box, Supplemental Restraint System Module (SRS)
- phone module (PHM) 10A and climate control module (CCM) 12A.
To connect the test box to the PHM control unit, see Connecting the breakout box, Car phone module Connecting the Breakout Box
To connect the test box to the CCM control unit, see Connecting the breakout box Connecting the Breakout Box, Supplemental Restraint System Module (SRS)
- passenger door module (PDM) (driver door module (DDM), on right-hand drive vehicle) 3A, climate control module (CCM) 12A and intermediate connector 54/11.
To connect the test box to the PDM/DDM control units, see Connecting the breakout box Connecting the Breakout Box
To connect the test box to the CCM control unit, see Connecting the breakout box Connecting the Breakout Box, Supplemental Restraint System Module (SRS)
- climate control module (CCM) 11A and steering wheel module (SWM) 19.
To connect the test box to the CCM control unit, see Connecting the breakout box Connecting the Breakout Box, Supplemental Restraint System Module (SRS)
To connect the test box to the SWM control unit, see Connecting the breakout box Connecting the Breakout Box
- steering wheel module (SWM) 20 and supplemental restraint system (SRS) 25B.
To connect the test box to the SWM control unit, see Connecting the breakout box Connecting the Breakout Box
To connect the test box to the SRS control unit, see Connecting the breakout box Connecting the Breakout Box, Supplemental Restraint System Module (SRS)
- supplemental restraint system (SRS) 26B, upper electronic module (UEM) 5 and intermediate connector 54/13.
To connect the test box to the SRS control unit, see Connecting the breakout box Connecting the Breakout Box, Supplemental Restraint System Module (SRS)
To connect the test box to the UEM control unit, see Connecting the breakout box Connecting the Breakout Box
- driver door module (DDM) (passenger door module (PDM) on right-hand drive vehicle) 3A, upper electronic module (UEM) 5 and intermediate connector 54/10.
To connect the test box to the DDM/PDM control units, see Connecting the breakout box Connecting the Breakout Box
To connect the test box to the UEM control unit, see Connecting the breakout box Connecting the Breakout Box
Additional information:
- The voltage should be between approximately 1.5 V and 2.5 V.
- To disconnect the battery, see Battery, disconnecting Battery Disconnecting
Press Continue
Continue - DONE
-------------------------------------------------