SERVICE MANUAL UPDATE SEC. 8A-REMOTE KEYLESS ENTRY

VEHICLES AFFECTED: 1990 OLDSMOBILE C-H CARS

The following pages reflect product changes. These pages are contained herein:

8A-132-1 - Changes 1084 CKT from PPL/WHT to RED - Shows dashed line between Program Connector terminals A and B - Labeled "EARLY PRODUCTION" to reflect original ground circuit routing

8A-132-1A - Changes 1084 CKT from PPL/WHT to RED - Shows dashed line between Program Connector terminals A and B - Changes ground circuit routing - Labeled "LATE PRODUCTION" to reflect new ground circuit routing

8A-132-9 Updates "PROGRAM PROCEDURE" by eliminating wire colours from Step 2

In addition, the following pages should be revised to reflect minor changes, as noted:

8A-132-8 - Changes keyless entry module connectors C1 and C2 Test, Step 11 as follows: "Change from "Check PPL/WHT (1084) Wire" to "Check RED (1084) Wire

ADDITIONAL INFORMATION:

In response concerning omission of Section 9K from Oldsmobile "C/H" Service Manual; keyless entry module information can be found in Section 8A except for R&R which is in Section 8C.

Comparison of 1990 Oldsmobile "N, W, C, and H" manuals shows coverage and location as follows:

N Manual W Manual C/H Manual Subject Section 9K Section 9K Section 8A Section 8C ------- ---------- ---------- ---------- ---------- General X (text X (text X (table Descrip. format) format) format)

"Remote Lock X (text X (text X (table Control Oper. format) format) format)

Diagnosis (referenced) (referenced) X

On-Vehicle Serv: "Remote Door X X X ("keyless Lock Receiver" entry module") R&R

"Coding the X X X ("Programming Transmitters Procedure")

"Battery" R&R X X

Note: Refer to 1990 Oldsmobile Cutlass Calais (N carline) Section 9K for a one section reference on keyless entry.

CIRCUIT OPERATION

The Remote Keyless Entry System includes a hand held radio Transmitter and Keyless Entry Module. The Transmitter sends digitally encoded radio signals to the Module when a button is pushed. Transmitter range is 7 meters (23 feet). The following circuits can be controlled.

Illuminated Entry

the Keyless Entry Module momentarily grounds the Interior Lights for approximately 40 seconds when a door unlock signal is received by the Keyless Entry Module.

Door Locks

When the Transmitter Unlock Button is pressed once, the driver's door will be unlocked. The Keyless Entry Module receives the transmitted signal and activates its output at terminal C1/C. This applies battery voltage directly to the LH Front Door Lock Motor which is grounded through the Door Lock Relay Assembly, whick remains de-energized.

Pushing the Unlock Button twice results in the Keyless Entry Module activating its output at terminal C1/D. This energizes the Unlock Relay in the Door Lock Relay Assembly and unlocks the RH front and/or rear doors (if equipped with 4 door).

The LH Front Door Lock Motor is driven directly by the Keyless Entry Module.

Pressing the Transmitter Lock Button results in the Keyless Entry Module activating its output at connector C1 terminal E. This energizes the Lock Relay in the Door Lock Relay Assembly and locks the doors. The LH front door is grounded through the Keyless Entry Module when locking.

Luggage Compartment Lid Release

The Luggage Compartment Lid Release is operated by applying battery voltage to the Luggage Compartment Lid Release Solenoid.

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.