B3634
DTC B3634
CIRCUIT DESCRIPTION
The head-up display (HUD) monitors the HUD dimming up switch signal circuit in order to perform the switch functions. When the HUD dimming up switch is depressed and the ignition is in the RUN position, the dimming switch signal to the HUD is low. When the HUD detects that the HUD dimming switch signal is low for greater than 60 seconds, DTC B3634 sets.
DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC B3634 Head Up Display (HUD) Dimming (Up) Switch Circuit
CONDITIONS FOR RUNNING THE DTC
The ignition is RUN.
CONDITIONS FOR SETTING THE DTC
The HUD detects that the HUD dimming up switch signal circuit is low for greater than 60 seconds.
ACTION TAKEN WHEN THE DTC SETS
The HUD ignores the malfunctioning switch circuit.
CONDITIONS FOR CLEARING THE DTC
- The current DTC clears when fault is no longer present but all history codes remain.
- The HUD receives a clear code command from the scan tool.
TEST
