Control module and output signals

SAE- DTC	DTC text	Corrective action
P0600	Serial Communication Link	Check terminal resistance for CAN-Bus. Refer to Terminal resistance for CAN-Bus, checking Replace Motronic Engine Control Module (ECM) -J220-. Refer to Engine Control Module (ECM), replacing
P0601	Internal Control Module Memory Check Sum Error
P0602	Control Module Programming Error
P0604	Internal Control Module Random Access Memory (RAM) Error
P0605	Internal Control Module Read Only Memory (ROM) Error
P0606	ECM/PCM Processor

SAE- DTC	DTC text	Corrective action
P0638	Throttle Actuator Control Range/Performance, Bank 1	Check Throttle Valve Control Module -J338-. Refer to Throttle valve control module, checking Check Throttle Position (TP) Sensor -G79- and Sender 2 for accelerator pedal position -G185-. Refer to Throttle Position (TP) sensor, checking
P0685	ECM/PCM Power Relay Control Circuit /Open	Check Activation of Motronic Engine Control Module (ECM) Power Supply Relay -J271- according to wiring diagram:. Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations
P0686	ECM/PCM Power Relay Control Circuit Low
P0687	ECM/PCM Power Relay Control Circuit High
P0688	ECM/PCM Power Relay Sense Circuit /Open