Control Unit Input Test - Acura 3.5 RL Manual

Control Unit Input Test

NOTE:
• Before testing, go to the Troubleshooting Guide (see page 23-244). Be sure to go through self-diagnosis function
modes 1 and 2 (see pages
• All connector views are from the wire side of female terminals unless otherwise noted.
Multiplex Control Unit (Passenger's):
1. Remove the right kick panel (see
2. Disconnect the 22P and 26P connectors, then remove the passenger's unit (see page 23-246).
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.
If a 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.
Disconnect the connectors from the passenger's unit.
Cavity Wire Test condition
A2 Under all conditions
BLK
A3
Ignition switch ON (II)
A14 YEL
Ignition switch at
START (III) and rear
YEL/GRN window defogger
A19
switch ON
Reconnect the connectors to the passenger's unit.
Cavity Wire Test condition
Ignition switch ON (II)
and rear window
A6 YEL/BLU
defogger switch ON
23-248 and 23-252).
section 20).
Test: Desired result
Check for continuity to ground:
There should be continuity
Check for voltage to ground:
There should be battery voltage.
Check for voltage to ground:
There should be battery voltage.
Test: Desired result
Check for voltage to ground:
There should be less than 1 V.
Possible cause if result is not obtained
• Poor ground (G401, G402)
• An open in the wire
• Blown No. 13 (7.5 A) fuse in the
under-dash fuse/relay box
• An open in the wire
• Blown No. 19 (7.5 A) fuse in the
under-dash fuse/relay box
• Faulty rear window defogger relay
• Faulty indicator light
• An open in the wire
Possible cause if result is not obtained
• Faulty rear window defogger
switch
• Poor ground (G401, G402)
• An open in the wire