Output Functions
Four High Side Driver Outputs (2 Right and 2 Left Bank) - The high side driver output function is to distribute energy to the correct bank based on a camshaft position output (CMPO) signal and provide regulated current to the injectors. The powertrain control module (PCM) commands the fuel quantity and the fuel injection control module (FICM) controls the duration of the injection event.
Low Side Driver Outputs - The low side driver outputs control the sequencing (firing order) of the engine.
CAUTION:
The PCM harness connectors must be properly seated and the connector latch properly attached to eliminate possible driveability concerns or a no-start condition. Installing PCM connectors on an angle may cause an improper connection, misdiagnosis, and damaged components. Install the connector until the lever pivots and seats itself. Apply light pressure to get the connector into position on the PCM and then fully seat the connector.
NOTE:
Visually inspect the harness connectors for corrosion, damage, proper mating and correct pin tension.
NOTE:
When the PCM is disconnected additional DTCs will be set. Clear all DTCs after restoring the vehicle.
CAUTION:
Do not pierce engine electrical wires or damage to the harness can occur.