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, and disconnect its connector.
- 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.
- With the passenger's multiplex control unit still disconnected, make these input tests at the connectors and the passenger's under-dash fuse/relay box sockets.
- 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 4.CONTROL UNIT INPUT TEST (PASSENGER'S UNIT - 1 OF 2)
Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained B22(1) BLK Under all conditions Check for continuity to ground:
There should be continuity.- Poor ground (G503)
- Faulty passenger's fuse/relay box
- An open in the wire
A8 Fuse/relay box socket Under all conditions Check for continuity to ground:
There should be continuity.- Poor ground (G651)
- Faulty passenger's fuse/relay box
- An open in the wire
A9 Under all conditions Attach to ground:
Horns should sound.- Blown No. 47 (20 A) fuse in the under-hood fuse/relay box
- Faulty passenger's fuse/relay box
- Faulty horn relay
- Faulty horn
- An open in the wire
A20 Under all conditions Attach to ground:
Headlights should come on.- Faulty headlight relay 1 or 2
- Faulty passenger's fuse/relay box
- 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
- Faulty driver's fuse/relay box
- Faulty passenger's fuse/relay box
- An open in the wire
A23 Under all conditions Check for voltage to ground:
There should be battery voltage.- Blown No. 12 (20 A) fuse in the passenger's under-dash fuse/relay box
- Faulty passenger's fuse/relay box
A24 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
- Faulty passenger's fuse/relay box
A10 Fuse/relay box socket Jump A10 to battery voltage and B11 to body ground. Check driver's door lock operation:
The door should lock.- Faulty driver's door lock actuator
- Faulty passenger's fuse/relay box
- An open in the wire
B11(1) YEL A10 Fuse/relay box socket Jump A10 to battery voltage and A11 to body ground. Check passenger's doors lock operation:
The door should lock.- Faulty passenger's door lock actuator
- Faulty passenger's fuse/relay box
- An open in the wire
A11 Check tailgate lock operation:
The tailgate should lock.- Faulty tailgate lock actuator
- Faulty passenger's fuse/relay box
- An open in the wire
A1 PNK Connect A1 terminal to A24 terminal momentarily. Check keyless buzzer operation:
The buzzer should sound.B21(1) BLU Under all conditions Check for continuity to ground:
There should be continuity.- Poor ground (G502)
- Faulty connections at the audio unit or navigation display unit
- Faulty audio unit or navigation display unit
- Faulty passenger's fuse/relay box
- An open in the wire
(1) Passenger's Multiplex Control Unit Connector B (2) '03 Model (3) '04-'06 Models
- Reconnect the passenger's multiplex control unit to the passenger's under-dash fuse/relay box, turn the ignition switch ON (II) to keep the system awake, and perform the following input tests at the appropriate connectors on the passenger's under-dash fuse/relay box. For passenger's under-dash fuse/relay box connector socket location (see PASSENGER'S UNDER-DASH FUSE/RELAY BOX
).NOTE: When testing passenger's door lock knob switches, begin with all doors locked, then test one at a time.
- 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
.CONTROL UNIT INPUT TEST (PASSENGER'S UNIT - 2 OF 2)
Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained C16 GRN Passenger's door open Check for voltage to ground:
There should be less than 1 V.- Faulty passenger's door switch
- An open in the wire
- Short to ground
Passenger's door closed Check for voltage to ground:
There should be 5 V or more.C14 GRN/WHT Right rear door open Check for voltage to ground:
There should be less than 1 V.- Faulty right rear door switch
- An open in the wire
- Short to ground
Right rear door closed Check for voltage to ground:
There should be 5 V or more.C8 RED/BLU Wake up the multiplex system by locking all doors with the power door lock switch; Left rear door lock knob switch unlocked Check for voltage to ground:
There should be less than 1 V.- Poor ground (G601)
- Faulty left rear door lock actuator
- An open in the wire
- Short to ground
Wake up the multiplex system by locking all doors with the power door lock switch; Left rear door lock knob switch locked Check for voltage to ground:
There should be 5 V or more.Wake up the multiplex system by locking all doors with the power door lock switch; Right rear door lock knob switch unlocked Check for voltage to ground:
There should be less than 1 V.- Poor ground (G652)
- Faulty right rear door lock actuator
- An open in the wire
- Short to ground
Wake up the multiplex system by locking all doors with the power door lock switch; Right rear door lock knob switch locked Check for voltage to ground:
There should be 5 V or more.E2 GRN/BLK Wake up the multiplex system by locking all doors with the power door lock switch; Passenger's door lock knob switch unlocked Check for voltage to ground:
There should be less than 1 V.- Poor ground (G651)
- Faulty passenger's door lock actuator
- An open in the wire
- Short to ground
Wake up the multiplex system by locking all doors with the power door lock switch; Passenger's door lock knob switch locked Check for voltage to ground:
There should be 5 V or more.E5 BLU/ORN Passenger's door lock switch in UNLOCK Check for voltage to ground:
There should be less than 1 V.- Poor ground (G651)
- Faulty passenger's door lock switch
- An open in the wire
- Short to ground
Passenger's door lock switch in neutral position Check for voltage to ground:
There should be 5 V or more.E6 BLK/ORN Passenger's door lock switch in LOCK Check for voltage to ground:
There should be less than 1 V.Passenger's door lock switch in neutral position Check for voltage to ground:
There should be 5 V or more.B21(1) BLU Under all conditions Check for voltage to ground:
There should be less than 1 V.- Poor ground (G502)
- Poor connection at audio unit or navigation display unit
- Faulty audio unit or navigation display unit.
- An open in the wire
(1) Passenger's Multiplex Control Unit Connector B