Computers and Control Systems: Service Precautions

ECM SUBSTITUTION
When substituting a known-good ECM, check for following conditions. Neglecting this check may cause damage to known-good ECM.
- Resistance value of all relays, actuators is as specified respectively.
- MAF sensor, manifold differential pressure sensor, TP sensor and fuel tank pressure sensor are in good condition and none of power circuits of these sensors is shorted to ground.