Campaign - MICU Replacement: Overview
03-029June 6, 2003
Applies To:
2003 Accord V6 2-Door - From VIN 1HGCM8...3A000001 thru 1HGCM8...3A018771
Product Update: Accord V6 Multiplex Integrated Control Unit
BACKGROUND
When you insert the key in the driver's door lock and turn it quickly, the passenger's door may not lock and the security system may not arm. In addition, if you open the trunk and then immediately close it, the security system may not arm the trunk. This is an intermittent problem that does not affect the remote transmitters. It is caused by a timing discrepancy in the multiplex integrated control unit (MICU).
CUSTOMER NOTIFICATION
All owners of affected vehicles will be sent a notification of this product update. An example of the customer notification is shown in this service bulletin.
Before beginning work on a vehicle, verify it is eligible by checking one of these items:
^ The customer has a notification letter.
^ The vehicle is shown on your campaign responsibility report.
^ The vehicle is shown as eligible on an iN VIN status inquiry.
If any affected vehicles are in your new or used vehicle inventory, repair them as described in this service bulletin.
CORRECTIVE ACTION
Replace the under-dash fuse/relay box. (The MICU is inside the fuse box.)
PARTS INFORMATION
Under-Dash Fuse/Relay Box:
P/N 38200-SDN-A22, H/C 7426554
WARRANTY CLAIM INFORMATION
Operation Number: 747102
Flat Rate Time: 0.6 hour
Failed Part: P/N 38200-SDN-A21
H/C 7170665
Defect Code: 5AY
Contention Code: L90
Template ID: 03-029A
Skill Level: Repair Technician
REPAIR PROCEDURE
NOTE:
SRS components are located in this area. Review the SRS component locations, precautions, and procedures before doing this repair procedure (see page 23-17 of the 2003 Accord Service Manual).
1. Write down your customer's radio station presets. Make sure you have the anti-theft code for the radio and the navigation system (if equipped).
2. Disconnect the battery negative cable and the positive cable, then wait at least 3 minutes.
3. Remove the left door sill trim and the left kick panel (see page 20-90 of the 2003 Accord Service Manual).
4. Remove the driver's dashboard under cover (see page 20-16 of the 2003 Accord V6 Service Manual Supplement).
5. Remove the two mounting bolts from the under-dash fuse/relay box, then pull the fuse box away from the body.
6. Disconnect the connectors, and remove the fuse box.
7. Remove all fuses and relays from the old fuse box, and install them in their correct locations in the new fuse box.
8. Connect the connectors to the new fuse box, then install the fuse box with the original mounting bolts.
9. Reconnect the positive and the negative battery cables.
10. Enter the anti-theft code for the radio and the navigation system (if equipped).
11. Enter your customer's radio station presets, and set the clock.
12. Make sure all electrical components are working.
13. Install the driver's dashboard under cover, the left kick panel, and the left door sill trim.
14. Center-punch a completion mark above the 1st character of the engine compartment VIN.
Disclaimer