OnStar(T) - Status Light Red After Update

OnStar System Status Light Is Solid Red After Update

NOTE:
This article applies to '05 MDXs with the navigation system and '05 RLs.

Before you update the OnStar control unit using S/B 05-028, Product Update: On-Star Control Unit May Lose Minutes, first check if the OnStar system status indicator is solid red. If it is, there's a problem with the system. You've got to fix that problem before you can move on. The update procedure only fixes the OnStar lost minutes problem.

If, after you've done the update procedure, the OnStar system status indicator is lit solid red, follow these steps to read and clear any DTCs stored in the control unit:

1. With the ignition switch turned to LOCK (0), press and hold the call answer/call end button.

2. Quickly cycle the ignition switch from LOCK (0) to ACCESSORY (I) four times within 6 seconds. Leave the ignition switch in ACCESSORY (I) after the fourth cycle, then release the call answer/call end button. The indicator will blink the stored DTCs.

3. To clear any stored DTCs, wait until the OnStar system status indicator stops blinking and turns solid red. Then, within 2 seconds, press and release the OnStar button.

For more info, see pages 22-472 and 22-473 of the '03-06 MDX S/M or pages 23-168 thru 23-171 of the '05 RL S/NI. (Online, enter the keyword ONSTAR, and select How to Troubleshoot the OnStar System from the list.)