Trunk - Will Not Open With Remote Transmitter
98-062August 22, 2000
Applies To:
1998 Accord - See VEHICLES AFFECTED
Trunk Will Not Open With the Remote Transmitter
(Supersedes 98-062, dated March 7, 2000)
Updated information is shown by black bars and asterisks.
* SYMPTOM
Pressing the trunk release button on the remote transmitter does not open the trunk.
PROBABLE CAUSES
^ The car comes with two transmitters. If the customer purchases a third transmitter and has it programmed into the system, it will not work as expected. The first time, it will open the trunk on the first push of the button. After that, the button must be pushed twice before the trunk will open. This is normal and cannot be changed. It does not affect the operation of the other two transmitters.
^ The customer may have been sold a 2000 model year remote transmitter as a third transmitter or as a replacement. A 2000 transmitter will open the doors, but not the trunk.
^ The MPCU (multiplex control unit) on the passenger's side has an internal failure. *
VEHICLES AFFECTED
* CORRECTIVE ACTION
^ Replace any 2000 model year remote transmitters.
^ Replace the passenger's side MPCU. *
PARTS INFORMATION
Multiplex Control Unit, Passenger's:
P/N 38850-584-A23, H/C 5785043
WARRANTY CLAIM INFORMATION
In warranty:
The normal warranty applies.
Out of warranty:
Any repair performed after warranty expiration may be eligible for goodwill consideration by the District Service Manager or your Zone Office. You must request consideration, and get a decision, before starting work.
DIAGNOSIS
* NOTE:
You will need all of the customer's remote transmitters.
1. Verify proper operation of all remote transmitters. Press and hold the trunk release button on the remote transmitter for at least 2 seconds. Repeat this procedure two more times with each of the customer's remote transmitters. *
^ If the trunk opens each time, return the car to the customer. Remind the customer to hold the button down until the trunk opens.
^ If the trunk does not open, go to step 2.
*2. Resynchronize each transmitter by pressing the lock/unlock button six times. Try to lock and unlock the doors with each remote transmitter to check synchronization, then try to open the trunk. Attempt to open the trunk at least two times with each of the customer's remote transmitters.
^ If the trunk opens, return the vehicle to the customer.
^ If at least one remote transmitter opens the trunk, go to step 3.
^ If the trunk will not open with any transmitter, go to step 4.
NOTE:
If a remote transmitter has lost battery power at any time, it loses synchronization with the keyless entry system.
3. To determine if the non-working remote transmitter is for a 2000 Accord, hold a known good 2000 model remote transmitter and the transmitter in question side by side. Press the trunk release button on each transmitter at the same time. The LED on the 2000 model remote transmitter will flash in 0.5 second. A 1998-99 model will flash in 1.1 seconds.
^ If the remote transmitter in question is a 2000 model, replace it with a 1998-99 model transmitter, reprogram all the remote transmitters, and return the car to the customer. Refer to page 22-228 of the 1998-2000 Accord Service Manual for the transmitter programming procedure, or Service Bulletin 98-011, Keyless Remote Transmitter Information, filed under Body Electrical.
^ If the remote is a 1998-99 model remote, then refer to page 22-227 of the 1998-2000 Accord Service Manual for the transmitter test procedure.*
4. Disconnect the 6P connector from the trunk latch assembly. Check for a momentary voltage reading at the WHT/RED wire terminal when you press and hold the remote transmitter button.
^ If you get no voltage reading, check for continuity between the MPCU and the trunk latch.
^ If you read a constant voltage, or a brief voltage spike, continue to REPAIR PROCEDURE.
REPAIR PROCEDURE
1. Remove the dashboard center lower cover (four clips).
2. Remove the passenger's-side fuse box cover.
3. Remove the passenger's-side dashboard lower cover (three screws and seven clips).
4. Remove the four screws from the bottom of the glove box.
5. Pry out the two screw covers, then remove the four screws from the top of the glove box.
6. Release the hooks. Pull down on the striker to pull the glove box out, disconnect the glove box light connector, and remove the glove box from the dashboard.
7. Remove the MPCU from the back of the fuse box.
8. Install the new MPCU.
9. Reinstall the glove box.
10. Reinstall the dashboard lower cover.
11. Reinstall the fuse box cover.
12. Reinstall the dashboard center lower cover.
* 13. Reprogram all the transmitters. Refer to page 22-228 of the 1998-2000 Accord Service Manual for the transmitter programming procedure, or Service Bulletin 98-011, Keyless Remote Transmitter Information, filed under Body Electrical.
14. Verify proper operation of all remote transmitters. *
Disclaimer