B2419

Diagnostic Chart (Part 1 Of 2):

Diagnostic Chart (Part 2 Of 2):

CIRCUIT DESCRIPTION
The Instrument Cluster (IPC) monitors the ambient light conditions through the ambient light sensor. The ambient light sensor is a variable resistor whose resistance changes as the ambient light level around it changes. As the ambient light decreases, the resistance of the ambient light sensor increases. The value of the input voltage will be between 0 and 5 volts. The voltage level at the Instrument Cluster (IPC) light input increases as the ambient light sensor resistance increases.

CONDITIONS FOR SETTING THE DTC
The IPC will set the DTC B2419 when it detects that the ambient light sensor input is less than 1 count or greater than 254 counts for three seconds.

SPECIFICATION
Normal sensor input: 1-254 Counts

ACTION TAKEN WHEN THE DTC SETS
The IPC will assume that the ambient light level indicates darkness for all functions needing the outside light status.

CONDITIONS FOR CLEARING THE DTC
^ The IPC sees that the ambient light sensor input is within the valid range.
^ Use the On-Boards clearing DTCs feature.
^ Use a scan tool.

TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table:
1. Perform the Lighting Systems Diagnostic System Check before continuing with the diagnosis of this DTC.
2. Checks if the value that the Instrument Cluster (IPC) is reading from the ambient light sensor is within the valid range.
3. Checks if the value that the Instrument Cluster (IPC) is reading from the ambient light sensor is too High.
4. Checks if the value that the Instrument Cluster (IPC) is reading from the ambient light sensor is too low.