C0499

DTC C0496, C0498, or C0499





Test 1-3





Test 4-14

Circuit Description
The Body Control Module (BCM), or Electronic Suspension Control (ESC) module, vehicles equipped with Real Time Damping (RTD), provides a Pulse Width Modulated (PWM) supply circuit to the Electronic Variable Orifice (EVO) solenoid. The supply circuit is used to control the current to the EVO solenoid which regulates the size of the Power steering pump output fluid orifice. This causes an increase or decrease in steering effort depending on vehicle speed.

Conditions for Running the DTC
Vehicle speed greater than 8 km/h (5 mph).
EVO solenoid command greater than 5 percent PWM duty cycle.

Conditions for Setting the DTC
EVO output PWM greater than 5 percent duty cycle and EVO feed back voltage is less than battery voltage minus 4.0 volts.

Action Taken When the DTC Sets
^ DTC C0496 will be stored in memory on vehicles equipped W/ RTD.
^ DTC C0498 and C0499 will be stored in memory on vehicles W/O RTD.
^ The EVO outputs will be disabled for the remainder of the ignition cycle

Conditions for Clearing the MIL/DTC
^ A current DTC will clear when malfunction is no longer present.
^ A history DTC will clear after 100 consecutive malfunction free ignition cycles.
^ Using the scan tool

Test Description
The numbers below refer to the step numbers on the diagnostic table.
2. Tests the EVO solenoid circuits in there active state using the scan tool.
3. Tests if the BCM/ESC module is providing voltage to the EVO solenoid.
4. Tests for an open in the control circuit to the EVO solenoid.
5. Tests if voltage is constantly being applied to the EVO solenoid.
13. Reprogram the BCM/ESC module when replacement is necessary.