ES 350 V6-3.5L (2GR-FE) (2007)
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NOTE:
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The connector should not be disconnected from the ECU. Perform the inspection from the backside of the connector on the wire harness side.
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When no measuring condition is specified, perform the inspection with the engine stopped and the engine switch on.
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Check that the connectors are fully seated. Check for loose, corroded or broken wires.
a. First, check the ECU ground circuit. If it is faulty, repair it. If it is normal, the ECU could be faulty. Temporarily replace the ECU with a normally
functioning one and check if the symptoms occur. If the trouble symptoms disappear, replace the original ECU.
1. Measure the resistance between the ECU ground terminal and body ground.
Standard resistance: Below 1 ohm
2. Disconnect the ECU connector. Check the ground terminal on the ECU side and wire harness side for bending, corrosion or foreign matter.
Lastly, check the contact pressure of the female terminals.
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
When a "Normal" code is output during a DTC check but the problem still occurs, use the Problem Symptoms Table. The suspected areas (circuits or
parts) for each problem symptoms are in the table. The suspected areas are listed in order of probability. A description of each of the chart's columns is
shown in the table.
HINT: In some cases, the problem is not detected by the diagnostic system even though a problem symptom occurs. It is possible that the problem
occurs outside the detection range of the diagnostic system, or that the problem occurs in a completely different system.
Symptom Simulation
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.
For example:
With a problem that only occurs when the engine is cold or as a result of vibration caused by the road during driving, the problem can never be
