How To Proceed With Troubleshooting

• 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

1. Action for non-repeatable malfunction 
   Fig 2: Shaking Wiring Harness/Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   Fig 3: Checking Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   • If the malfunction does not recur, verify the malfunction cause by performing the following actions:
     • 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.
     • 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.
     • Inspect the female terminals on the connector of the electric component which is suspected to be the cause of the malfunction for poor connection.
2. SYMPTOM TROUBLESHOOTING [WIRELESS DOOR LOCK] 
   • If there is any vehicle malfunction complaint lodged by a customer, perform malfunction diagnosis according to the troubleshooting procedure.

   Troubleshooting Procedure 

   Fig 4: Troubleshooting Procedure Chart

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1: Refer to CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW

3. Action for non-repeatable malfunction 
   • If the malfunction does not recur, verify the malfunction cause by performing the following actions:
     • Based on the repair order form, attempt to drive the vehicle or perform tests to replicate the malfunction, record the data (such as main body ECU and engine stop and start ECU unit circuit voltage) at that time, and detect the malfunction cause.
     • 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.
     • Inspect the female terminals on the connector of the electric component which is suspected to be the cause of the malfunction for poor connection.
   Fig 5: Shaking Wiring Harness/Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   Fig 6: Checking Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. SYMPTOM TROUBLESHOOTING [THEFT-DETERRENT SYSTEM] 
   • If there is any vehicle malfunction complaint lodged by a customer, perform malfunction diagnosis according to the troubleshooting procedure.

   Troubleshooting Procedure 

   Fig 7: Troubleshooting Procedure Chart

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1: Refer to CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW

5. Action for non-repeatable malfunction 
   • If the malfunction does not recur, verify the malfunction cause by performing the following actions
     • Based on the repair order form, attempt to drive the vehicle or perform tests to replicate the malfunction, record the data (such as main body ECU circuit voltage) at that time, and detect the malfunction cause.
     • 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.
     • Inspect the female terminals on the connector of the electric component which is suspected to be the cause of the malfunction for poor connection.
   Fig 8: Shaking Wiring Harness/Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   Fig 9: Checking Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002