Circuit/System Testing
WARNING: This page is about a different car, the 2012 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the X1 harness connector at the P17 info display module.
- Test for less than 10 Ω between the ground circuit terminal 2 and ground.
- If greater than the specified range, test the ground circuit for an open/high resistance.
- Verify that a test lamp illuminates between the B+ circuit terminal 1 and ground.
- If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
- Ignition ON, radio ON, verify a test lamp illuminates between the remote enable signal circuit terminal 6 and ground.
- If the test lamp does not illuminate, test the remote enable signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the A11 radio.
- Lights ON, set the dimming switch to full bright. Test for 1-1.5 V on the display dimming control circuit terminal 3.
- If less than the specified value, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the A11 radio.
- If greater than the specified value, test the control circuit for a short to voltage. If the circuit tests normal, replace the A11 radio.
- Use the dimming switch to decrease the dimming level to full dim. Verify the voltage increases steadily to 6-7 V at full dim.
- If less than the specified value, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the A11 radio.
- If greater than the specified value, test the control circuit for a short to voltage. If the circuit tests normal, replace the A11 radio.
- If all circuits test normal, replace the P17 info display module.