DTC 28, VES Tracking Error (Circuit Open, Shorted To Ground Or Shorted To Battery): Testing
- Check for DTCs 26 and 27. Diagnose and repair DTC 26 or 27 if present. Turn ignition switch to OFF position. Disconnect CCM connector C2. Using DVOM, measure resistance between CCM connector C2 terminals C13 and C14. If resistance is greater than 20 ohms, go to step 3). If resistance is less than 7 ohms, replace power steering pump/EVO actuator. If resistance is 7-20 ohms, go to next step.
- Turn ignition switch to OFF position. Check for poor connections at CCM connector. If connections are okay, reconnect CCM connector and all other components. Clear DTCs and check if DTC resets. If DTC resets, replace CCM. If DTC does not reset, problem may be intermittent. Try to recreate fault while performing test by wiggling wiring and connectors. Check for poor connections at all connectors that may be causing intermittent condition.
- Disconnect power steering pump/EVO actuator connector. Connect a jumper wire between power steering pump/EVO actuator connector terminals. Using DVOM, measure resistance between CCM connector C2 terminal C13 and C14. If resistance is less than 2 ohms, replace power steering pump/EVO actuator. If resistance is greater than 2 ohms, go to next step.
- Using DVOM, check resistance in VES enable circuit and VES (PWM) output circuit. Also, check resistance in connections at CCM and power steering pump/EVO actuator connectors. Repair circuits or connections with high resistance as necessary.