Tundra 4WD V8-5.7L (3UR-FE) (2007)
If your results match the examples, a short circuit exists between terminal 1 of connector A and terminal 1 of connector C.
2. Disconnect connector B and measure the resistance.
If the results match the examples, a short circuit exists between terminal 1 of connector B2 and terminal 1 of connector C.
Check and Replace ECU
CHECK AND REPLACE ECU
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 ignition 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