Electronic control units (Information)

ELECTRONIC CONTROL UNITS

The electronic control units (ECU) fitted to vehicles make it advisable to follow suitable precautions prior to carrying out welding repair operations. Harsh conditions of heat and vibration may be generated during these operations which could cause damage to the units. See GENERAL INFORMATION, Electrical precautions.

In particular, it is essential to follow the appropriate precautions when disconnecting or removing the airbag ECU. See GENERAL INFORMATION, SRS Precautions.

ECU locations (3 door model shown, 5 door model similar)

Equipment

Prior to commencing any test procedure on the vehicle, ensure that the relevant test equipment is working correctly and any harness or connectors are in good condition. This particularly applies to electronic control units.

1. Central control unit (on forward side of passenger compartment fuse box, behind driver’s glove box)
2. Airbag ECU (on transmission tunnel below heater)
3. ABS ECU (below RH front seat)
4. Engine control module (rear of battery on LH side of engine compartment)