Simos 18 ECU pinout
Reference pin assignments for selected Simos 18 ECU coolant-pump, turbocharger-speed and wastegate signals.
Pin assignments
A 105/84 — PWM_CWP[INTER_HEAT]
Used on European vehicles.
K 91/15 — PWM_CWP[GB_COOL]
Used on some vehicles.
A 105/75 — N_TCHA
Turbocharger Hall Sensor
A 105/21 — LV_SAV / PWM_WG
China-market vehicles use this pin for the N75 wastegate valve. On other markets it drives the secondary air pump, or is not used at all.
Used on European vehicles.
K 91/15 — PWM_CWP[GB_COOL]
Used on some vehicles.
A 105/75 — N_TCHA
Turbocharger Hall Sensor
A 105/21 — LV_SAV / PWM_WG
China-market vehicles use this pin for the N75 wastegate valve. On other markets it drives the secondary air pump, or is not used at all.
Before connecting
Confirm the connector designation and pin numbering on the specific ECU and vehicle wiring diagram before making any connection. Equipment and market variants can use different assignments.