Disconnection of Full Load Enrichment System

Disconnection Of Full-Load Enrichment System
- If the Traction Control System (TCS) function is activated at wide open throttle, normal full-load enrichment by the MOTRONIC system must be suppressed. This is because the TCS system is now controlling the engine load via the TCS butterfly and the input from the main butterfly to the MOTRONIC control module is no longer giving correct information.
- When the TCS function is activated, the TCS control module sends out a 62 Hz Pulse Width Modulation (PWM) signal on pin 21, which goes to pin 38 on the MOTRONIC control module and full-load enrichment is suppressed whatever the position of the main butterfly.

Test Function, MOTRONIC
- To check that the "Disengaging the full-load enrichment system" function is working, the following control is conducted at every start.
- When the ignition is placed in the drive position and when the starter motor is running, the MOTRONIC control module sends an engine temperature signal to pin 11 on the TCS control module.
- The TCS control module responds by sending a 31 Hz test signal on the disengaging full-load enrichment system lead to the MOTRONIC control module.
- If the MOTRONIC control module does not receive this test signal from the TCS control module, diagnostic trouble codes are registered in the MOTRONIC system.
- Also see "Main butterfly position signal", refer to TCS Throttle Body.