Check for an electrical connection between the Black terminal and ground on the main wiring harness.
If there is no electrical connection, then the break in the Black wire between the control module and points G8, G10 should be repaired.
If there is an electrical connection, the ignition must be switched on.
Note: The coolant temperature must be below 60°C.
Next, measure the voltage between Black/Yellow (+) and Cherny (-) contacts on the main wiring harness.
If there is no voltage, then check the fuse number 12 (15 A). If the fuse is OK, repair the open in the Black/Yellow wire between the control module and fuse #12.
If there is battery voltage, then measure the voltage between White/Blue (+) and Cherny (-) contacts on the main wiring harness.
If there is no voltage, then you should check for an open White / Blue wire between the control module and the generator.
If there is battery voltage, then measure the voltage between Yellow/Green (+) and Cherny (-) contacts on the main wiring harness.
If there is no voltage, then check for an open in the Yellow/Green wire between the control unit and the EFE control module.
If battery voltage is present, replace the EFE control module and recheck.