DTC 71, LCD Dimming Output Circuit Shorted To Battery Or CCM Internal Open: Notes

CCM supplies ground for LCD dimming output circuit in the form of a Pulse Width Modulated (PWM) output through LCD dim control circuit to back lighting on radio control head and heater/air conditioning control head (if equipped with electronic heating/air conditioning). Power is supplied to LCD dim control circuit internally through radio control head and heater/air conditioning control head (if equipped with electronic heating/air conditioning).

DTC 71 will set when:

• Ignition 3 is on.
• Headlights and parking lights are on.
• PWM dimming control is not set for zero or 100 percent.
• No transition is captured over a specific time span at CCM terminal C2.
• PWM feedback shows a high logic state over the complete capture time.

When DTC 71 is set, SYS will flash.

DTC 71 will clear when:

• Ignition 3 is off.
• Headlights and parking lights are off.
• PWM dimming control is set for zero or 100 percent.
• A transition is captured over a specific time span at CCM terminal C2.
• PWM feedback does not show a high logic state over the complete capture time.