Filed Under (Toyota) by admin on 03-07-2010
1. SYMPTOM SIMULATION HINT: The most difficult case in troubleshooting is when no problem symptoms occur. In such a case, a thorough problem analysis must be carried out. A simulation of the same or similar conditions and environment in which the problem occurred in the customer’s vehicle should be carried out. No matter how much skill or experience a technician has, troubleshooting without confirming the problem symptoms will lead to important repairs being overlooked and mistakes or delays. (a) Vibration method: When vibration seems to be the major cause. HINT: Perform the simulation method only during the primary check period (for approximately 6 seconds) after the ignition switch is turned ON. (1) Slightly vibrate the part of the sensor considered to be the problem cause with your fingers and check whether the malfunction occurs. NOTE: Shaking the relays too strongly may result in open relays. (2) Slightly shake the connector vertically and horizontally. (3) Slightly shake the wire harness vertically and horizontally.