Precautions In Identifying Trouble Codes

Before identifying diagnostic code indicated by "CHECK ENGINE" light, don't disconnect couplers from ECM, battery cable from battery, ECM ground wire harness from engine. Such disconnection will erase memorized trouble in ECM memory.

If abnormality or malfunction lies in two or more areas, "CHECK ENGINE" light indicates applicable codes three times each.

And flashing of these codes is repeated as long as diagnosis terminal is grounded (spare fuse is connected) and ignition switch is held at ON position.

Take a note of diagnostic code indicated first.