Ignition Key Switch Test

WARNING: This page is about a different car, the 2006 Acura MDX, 2005 Acura MDX, 2004 Acura MDX, and 2003 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: For more key-in beeper information, refer to the following:

'03 model:
- - Circuit diagram (see '03 MODEL )
- - Input test (see CONTROL UNIT INPUT TEST )
'04-06 models:
- - Circuit diagram (see '04-'06 MODELS )
- - Input test (see GAUGE INPUT TEST and CONTROL UNIT INPUT TEST )

When the ignition key is in the ignition switch, the key-in beeper in the driver's multiplex control unit senses ground through the closed ignition key switch. When you open the driver's door, the beeper circuit senses ground through the closed door switch.

Remove the steering column upper and lower covers (see STEERING COLUMN REMOVAL AND INSTALLATION ).
Disconnect the 7P connector.

Fig 1: Disconnecting 7P Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Check for continuity between the No. 1 and No. 3 terminals.
- There should be continuity with the key in the ignition switch.
- There should be no continuity with the key removed.
If the continuity is not as specified, replace the ignition key switch.