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Home >> Cadillac >> 1996 >> Fleetwood Base >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Central Control Module >> Diagnosing & Repairing CCM DTCS >> DTC 27, VES Output Circuit (Circuit Shorted To Battery) >> Testing
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DTC 27, VES Output Circuit (Circuit Shorted To Battery): Testing

  1. Turn ignition switch to OFF position. Disconnect CCM connector C2. Disconnect power steering pump/EVO actuator connector. Using DVOM, measure resistance between power steering pump/EVO actuator connector terminals. If resistance is 7-15 ohms, go to next step. If resistance is not 7-15 ohms, replace power steering pump/EVO actuator.
  2. Turn ignition switch to RUN position. Using DVOM, measure voltage between power steering pump/EVO actuator connector terminal "A" and ground. If battery voltage is not present, go to next step. If battery voltage is present, repair short to battery in VES enable circuit.
  3. Using DVOM, measure voltage between power steering pump/EVO actuator connector terminal "B" and ground. If battery voltage is present, repair short to battery in VES (PWM) output circuit. If battery voltage is not present, go to next step.
  4. 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.
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