Diagnosis Tips Concerning the Entire System

DIAGNOSIS TIPS CONCERNING THE ENTIRE SYSTEM
1. When a trouble symptom occurs with which two or more system functions become abnormal simultaneously, the communication error between each unit is strongly suspected. Therefore, check the symptom with the service function link and communication check of the diagnosis service function.
2. When an error code is displayed, check that relevant wiring harness connectors are engaged correctly. If a failure is found, repair the connectors and check the trouble symptom again.
3. When the wiring harness connectors are engaged correctly, check the wiring harness. If the wiring harness is in good condition, replace relevant components. At this time, record the error code and service function data.

NOTE: If a system communication related failure is suspected, carry out the troubleshooting.