Acura 3.5 RL Manual page 1198

Multiplex Control Unit (Driver's):
1. Remove the under-dash fuse/relay box (see page 23-66).
2. Remove the driver's unit from the under-dash fuse/relay box.
3. 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, make the following input tests at the connector and the fuse/relay box socket.
— If any test indicates a problem, find and correct the cause, then recheck the system.
— If all the input tests prove OK, the control unit must be faulty; replace it.
Wire side of
female terminals
16P
CONNECTOR
26P CONNECTOR
Cavity Wire Test condition
Under all conditions
A7
Fuse/relay Under all conditions
A8
box socket
Ignition switch ON (II)
A13
*2: Canada
Test: Desired result
Check for voltage to ground:
There should be battery voltage.
Check for continuity to ground:
There should be continuity.
Check for voltage to ground:
There should be battery voltage.
MULTIPLEX CONTROL UNIT (DRIVER'S)
Wire side of
female terminals
Possible cause if result is not obtained
• Blown No. 56 (7.5 A) fuse in the
under-hood fuse/relay box
• An open in the wire
• Poor ground (G401, G402 or G251)
• An open in the wire
• Blown No. 13 (7.5 A) fuse in the
under-dash fuse/relay box
• Faulty under-dash fuse/relay box