Page text (OCR transcript)
IN–35
INTRODUCTION – HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS
Check and Replace ECU
First check the ECU ground circuit. If it is faulty, repair it. If it is nor-
mal, the ECU could be faulty, so replace the ECU with a known
good one and check if the symptoms appear.
Example
Ground
IN0383
(1) Measure the resistance between the ECU ground terminal
and the body body ground.
Resistance: 1 Ω or less
ECU Side
Ground
W/H Side
Ground
Ground
IN0384
(2) Disconnect the ECU connector, check the ground terminals
on the ECU side and wire harness side for bend and check
the contact pressure.
