Dynamic Radar Cruise Control System - How To Proceed With Troubleshooting

Lexus IS250 IS220d GSE20 ALE20 - CRUISE CONTROL


DYNAMIC RADAR CRUISE CONTROL SYSTEM - HOW TO PROCEED WITH TROUBLESHOOTING

  • HINT:
Use the following procedures to troubleshoot the dynamic radar cruise control system.
*: Use the intelligent tester.

1.VEHICLE BROUGHT TO WORKSHOP
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2.CUSTOMER PROBLEM ANALYSIS
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3.PROBLEM SYMPTOM CONFIRMATION
  • Result:
  • ConditionProceed to
    Symptom occursA
    Symptom does not occurB
B.
SYMPTOM SIMULATION
A
4.INSPECT BATTERY VOLTAGE
  • Standard voltage:
  • 11 to 14 V
    If the voltage is below 11 V, replace or recharge the battery before proceeding.
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5.CHECK COMMUNICATION FUNCTION OF MULTIPLEX COMMUNICATION SYSTEM (BEAN)

Use the intelligent tester to check if the multiplex communication system (MPX) is functioning normally.

Result
ResultProceed to
MPX DTC is not outputA
MPX DTC is outputB
B.
Go to MULTIPLEX COMMUNICATION SYSTEM
A
6.CHECK COMMUNICATION FUNCTION OF CONTROLLER AREA NETWORK (CAN)

Use the intelligent tester to check for normal function of the CAN communication system.

Check for DTCs.

  • Result:
  • ConditionProceed to
    DTC is not outputA
    DTC is outputB
B.
Go to CAN COMMUNICATION SYSTEM
A
7.DTC CHECK
  • Result:
  • ConditionProceed to
    DTC is outputA
    DTC is not outputB
B.
Go to step 9
A
8.DTC CHART
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Go to step 10
9.PROBLEM SYMPTOMS TABLE
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10.CIRCUIT INSPECTION
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11.TERMINALS OF ECM
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12.IDENTIFICATION OF PROBLEM
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13.REPAIR OR REPLACE
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14.CONFIRMATION TEST
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END