INSPECTION PROCEDURE
NOTICE:
* Turn the engine switch off before measuring the resistances between CAN bus main wires and between CAN bus branch
wires.
* Turn the engine switch off before inspecting CAN bus wires for a ground short.
* After the engine switch is turned off, check that the key reminder warning system and light reminder warning system are not
operating.
* Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the engine switch, any other
switches or the doors. If any doors need to be opened in order to check connectors, open the doors and leave them open.
HINT
* Operating the engine switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This
communication will cause the resistance value to change.
* Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring
due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may
help determine the cause of the malfunction.
PROCEDURE
1. RECONFIRM DTC OUTPUT
(a) Reconfirm DTCs.
HINT
If CAN MS bus DTC U1002 is output from the main body ECU (Techstream display/Main Body), troubleshoot for U1002 and
check for malfunctions in the CAN MS bus circuit.
Result:
B -- GO TO CIRCUITS INDICATED BY OUTPUT DTCS
A -- Continue to next step.
2. CHECK CAN BUS WIRE FOR DISCONNECTION (MULTIPLEX TILT AND TELESCOPIC ECU MAIN WIRE/CAN MS BUS)
(a) Turn the engine switch off.
(b) Disconnect the tilt and telescopic ECU connector.
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