ECC Code 50 (Loss Of EVO Steering)
WARNING: This page is about a different car, the 1992 Cadillac Brougham. However, it is still accessible from the selected car via links, so may be relevant.
- Turn ignition off. Disconnect EVO control module connector. Turn ignition switch to RUN position. Enter ECC diagnostic mode. See ENTERING DIAGNOSTIC MODE .
- If AUTO fan status light does not come on, go to next step. If AUTO fan status light does come on, check for short to ground in Gray wire circuit between EVO control module and ECC panel. If Gray wire circuit is okay, replace ECC panel.
- Measure voltage between ground and White wire terminal of EVO control module connector. If battery voltage is present, repair short to battery in White or Brown wires between EVO control module and EVO actuator.
- If battery voltage is not present, turn ignition off. Measure resistance between ground and White wire terminal of EVO control module connector. If resistance is more than 100 ohms, go to step 7). If resistance is less than 100 ohms, disconnect EVO actuator connector.
- Measure resistance between ground and White wire terminal of EVO control module connector. If resistance is less than 100 ohms, repair short to ground in White wire between EVO control module and EVO actuator.
- If resistance is more than 100 ohms, check for short to ground in Brown wire between EVO control module and EVO actuator. If wire is okay, replace EVO actuator.
- Measure resistance between Brown and White wire terminals of EVO control module connector. If resistance is not 7-15 ohms, go to next step. If resistance is 7-15 ohms, check for poor connection at EVO control module connector. If connection is okay, replace EVO control module.
- Disconnect EVO actuator connector. Measure resistance across EVO actuator connector terminals. If resistance is not 7-15 ohms, replace EVO actuator. If resistance is 7-15 ohms, repair open in White or Brown wires between EVO control module and EVO actuator.