4WAL EHCU DIAG. & EXCHANGE PROGRAM (SERVICE INFORMATION)
SUBJECT: 4WAL EHCU DIAGNOSTIC AND EXCHANGE PROGRAM
MODELS/YEARS: 1991 BRAVADA
This notice is being issued to reinforce DCS Message 92-022 which was sent to dealers on February 5, 1992. In addition, this notice cancels Management Bulletin 91-I-17 which should be discarded. On 2/5/92 the EHCU exchange program ended. Exchange units are no longer available from Oldsmobile. If a replacement EHCU is required, please order it from GMSPO. It would be appreciated if your parts department would continue to return replaced EHCU units to Kelsey-Hayes along with a repair order and a completed reporting form even though the formal exchange program is ended. Thank you for your assiatance.
This bulletin covers preliminary diagnosis and an exchange procedure for the Four Wheel Anti-Lock (4WAL) Electro Hydraulic Control Unit (EHCU).
In order to give needed product feedback ANY EHCU needing warranty repair will be exchanged for a replacement unit. This program is being applied to the Bravada to aid in future product improvements.
Important: Customer pay units requiring repair can continue to be serviced using pans available through GMSPO.
PRELIMINARY DIAGNOSTIC PROCEDURE:
o Refer to the 1991 Bravada Service Manual Section 5A4 diagnostic charts. o Verify codes set indicate an EHCU failure requiring replacement. o Ensure all wiring connections are making good contact and are properly seated.
EXCHANGE PROCEDURE:
1. Make a copy of page 4 of this bulletin and fill in the requested information before calling. Be sure to note the exact customer concerns. It is necessary to record this information as it will be needed to fill out the form on the EHCU returned. (Blank forms will be shipped with exchange unit.)
2. Call Technical Assistance at (517)-885-6537. After it has been determined that an EHCU replacement is required, Technical Assistance will arrange with Kelsey-Hayes to ship an exchange unit within one working day (24 hours).
3. Once an exchange unit is received, the replaced unit is to be returned to Kelsey-Hayes within 8-10 days to avoid a chargeback/debit. A return shipping label will be sent with the exchange unit.
4. The exchange unit will have a plastic bag with it. This bag will contain:
Return shipping label Reporting form Return shipping carrier information
Note: Technician should thoroughly bleed the brake system following EHCU Replacement (reference Dealer Technical Bulletin 91-T-09).
PREPARATION FOR SHIPPING:
1. Remove all plastic shipping plugs and covers from the replacement unit and install them on the replaced unit.
2. Place the report form and a copy of the repair order in the enclosed plastic bag. Attach the bag to the concerned unit with enclosed wire.
3. Repack the concerned unit into the original shipping container.
4. Place the shipping label on the original shipping container.
WARRANTY INFORMATION:
For repairs performed under warranty, claims may be submitted for R&R labor and Delco Supreme 11 Brake Fluid or its DOT 3 equivalent, if required. Replacement EHCUs will be shipped to the dealer on a no-charge basis.
For vehicles repaired under warranty, use:
Labor Labor *Parts Operation Description Time Allowance --------- ------------ ------ --------- H2505 EHCU Remove 1.3 hrs. $154.62 and Replace
The amount identified in the "Parts Allowance" column above represents 30% of dealer net for parts that were furnished by Kelsey Hayes. This amount is to be placed in the Net item Amount column of the claim.
General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.
