Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Passenger's Unit
2008 Acura MDXSECTION Passenger's Unit
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.
- Remove the passenger's multiplex control unit from the passenger's under-dash fuse/relay box.
- Inspect the connector and socket terminals to be sure they are all making good contact.
- If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
- If the terminals look OK, go to step 3.
- Make the following input tests at the 22P connector B and the passenger's under-dash fuse/relay box socket connector A.
Be careful not to spread the fuse box connectors.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, go to step 1 in DOOR UNIT .
MULTIPLEX CONTROL UNIT INPUT TEST (PASSENGER'S UNIT)Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained B22 BLK Under all conditions Check for continuity to ground:
There should be continuity.- Poor ground (G503)
- An open in the wire
A24 Fuse/relay box socket Under all conditions Check for voltage to ground:
There should be battery voltage.- Blown No. 13 (7.5 A) fuse in the passenger's under-dash fuse/relay box
- Blown No. 54 (40 A) fuse in the under-hood fuse/relay box
- Faulty passenger's under-dash fuse/relay box
A8 Under all conditions Check for continuity to ground:
There should be continuity.- Poor ground (G651)
- An open in the wire
A22 Ignition switch ON (II) Check for voltage to ground:
There should be battery voltage.- Blown No. 9 (10 A) fuse in the driver's under-dash fuse/relay box
- An open in the wire
A12 Under all conditions Attach A12 to battery voltage:
Power window relay should click.
Check voltage between No. 7 (20 A) passenger's fuse and ground:
There should be battery voltage.- Poor ground (G651)
- Faulty passenger's fuse box
- Faulty power window relay
- An open in the wire
- Blown No. 51 (40 A) fuse in the under-hood fuse/relay box
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.