Lock - Tailgate Lock Difficult to Open With Key Corroded
90honda04Model Applicable To
'88-89 HATCHBACK
CIVIC
File Under Bulletin No.
89-010
BODY Issue Date FEB 24, '89
Tailgate Lock Corrosion
PROBLEM
The tailgate lock cylinder is corroded by salt spray, making it very difficult or impossible to open the tailgate with the key.
CORRECTIVE ACTION
Replace the tailgate lock cylinder and rubber grommet with the improved parts listed under PARTS INFORMATION. Before installing the new lock cylinder, it should be re-keyed to work with the customer's existing ignition key.
1. Remove the corroded tailgate lock cylinder, following the Service Manual procedure.
2. Disassemble the new cylinder assembly as follows:
^ Using a pair of pliers, remove the chrome bezel by rocking it back and forth.
^ Remove the "e" clip from the back.
^ Remove the white plastic rod holder and return spring.
Insert the key that came with the new cylinder into the lock and extract the tumbler holder from the cylinder.
3. Carefully extract the key from the tumbler holder. Remove the seven brass tumblers.
NOTE: Each tumbler is backed by a small coil spring. These springs can fall out of the holder, so don't lose them.
4. Using a Honda Key Code book (Ilco Anicon or Curtis), cross-reference the key number on the customer's ignition key to its key code.
5. Obtain replacement tumblers from parts stock. Each tumbler has a number (1-6) stamped on it. Seven tumblers should be selected which match the first seven digits of the Key Code (the eighth digit is not used for a tailgate lock). For example, a key code of 21315511 requires three tumblers stamped with a 1, two stamped with a 5, one stamped with a 2, and one stamped with a 3. (Remember to drop the last digit.)
6. Starting at the front of the tumbler holder, insert the new tumblers. Alternating from top to bottom, they should be installed in the order they appear in the Key Code. Verify the coil springs are in place before inserting the tumblers.
7. Insert the customer's key into the tumbler holder. If properly re-keyed, all tumblers should be flush with the body of the holder. If any stick out, recheck that tumbler's number against the key code.
8. When the tumbler holder is correctly re-keyed, assemble the cylinder in reverse order of disassembly.
9. Using the improved rubber grommet listed under PARTS INFORMATION, install the new cylinder assembly in the car and test its operation.
10. Lubricate the new lock cylinder by spraying WD-40 into the key opening. Use a nozzle to insure penetration.
PARTS INFORMATION
Description Part Number H/C
Cylinder 74812-SH3-013 3063419
Rubber Grommet 74815-SH3-020 3111770
Tumblers (Bag of 25)
Number 1 74834-SH3-305 3177383
Number 2 74835-SH3-305 3177391
Number 3 74836-SH3-305 3177409
Number 4 74837-SH3-305 3177417
Number 5 74838-SH3-305 3177425
Number 6 74839-SH3-305 3177433
Tumbler Springs
(Bag of 25) 74832-SH3-305 3177441
Outer Cap 74833-SH3-305 3177458
WARRANTY CLAIM INFORMATION
Operation number: 823145
Flat rate time: 0.6 hour
Failed part number: 74812-SH3-003 H/C 2703270
Defect code: 023
Contention code: B99