LS 430 V8-4.3L (3UZ-FE) (2002)
1. Measure the resistance between the ECU ground terminal and the body ground.
Resistance: 1 Ohm or less
2. Disconnect the ECU connector, check the ground terminals on the ECU side and the wire harness side for bend and check the contact
pressure.
Finding A Short Circuit
FINDING A SHORT CIRCUIT
a. Remove the blown fuse and disconnect all loads of the fuse.