How To Proceed With Troubleshooting [07/2015 - 08/2019]

GENERAL PROCEDURES [POWER STEERING ECU]
- If there is any vehicle malfunction complaint lodged by a customer, perform malfunction diagnosis according to the troubleshooting procedure.
Troubleshooting Procedure

Fig 1: Troubleshooting Procedure Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*1: Refer to CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [07/2015 - ]

Action for non-repeatable malfunction
- If the malfunction does not recur, verify the malfunction cause by performing the following actions:
  1. Using the Techstream, verify that no DTCs are stored.
    Refer to DTC CHECK / CLEAR [07/2015 - 08/2019]
  2. Based on the repair order form, attempt to drive the vehicle or perform tests to replicate the malfunction, record the data at that time, and detect the malfunction cause.
  3. Shake the wiring harness or connector of the electrical component which is suspected to be the cause of the malfunction, and inspect for malfunction or occurrence of any DTCs.
    
    Fig 2: Shaking Wiring Harness Or Connector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Inspect the female terminals for poor connection.
    
    Fig 3: Inspecting Female Terminals
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002