Circuit / System Verification

Ignition ON / Vehicle in Service Mode.
Verify DTC B1D73 or U223B is not set.
- If the DTC is set
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Go to next step: If the DTC is not set
Verify A22 Radio Control displays infotainment system information properly.
- If infotainment system information does not display properly
  Refer to Symptoms - Entertainment .
- Go to next step: If infotainment system information displays properly
Verify a test pattern is displayed is displayed on the P29 Head - Up Display when performing the Head - Up Display Pattern Check on the scan tool.
- If the test pattern is not displayed
  Refer to Circuit / System Testing.
- Go to next step: If the test pattern is displayed
Verify the P29 Head - Up Display performs the following function with the touch screen switches of the A22 Radio Control in the appropriate state:
- DIM + Switch - Head - up display brightness increases
- DIM - Switch - Head - up display brightness decreases
- UP Switch - Head - up display image moves up
- DOWN Switch - Head - up display image moves down
- ROTATION Switch - Head - up display image rotates
- If the P29 Head - Up Display does not perform the expected function with the switch in the appropriate state
  Refer to Circuit / System Testing.
- Go to next step: If the P29 Head - Up Display performs the expected function with the switch in the appropriate state
All OK.