DTC U0001-87: High Speed CAN Communication Bus - Missing message: Action

NOTE: Do NOT install a new integrated suspension control module as this will NOT rectify the fault

Using the manufacturer approved diagnostic system, check the snapshot data to determine the missing message source control module. Check the relevant control module for related DTCs and refer to the relevant DTC index
Refer to the applicable SYSTEM WIRING DIAGRAMS and check the relevant control module (i.e. as indicated by the snapshot data) power and ground circuits for open circuit. Repair circuits as required, clear DTC and retest
Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to the applicable SYSTEM WIRING DIAGRAMS and check the high speed CAN network (chassis and powertrain) between the relevant control module (i. e. as indicated by the snapshot data) and the integrated suspension control module