Cutlass Supreme FWD V6-189 3.1L (1989)
Technical Service Bulletin # 93U43
Date: 930501
Steering Wheel Control - New Tool & Revised Diagnostics
NUMBER: 93-U-43
CORP.REF.NO: 318102
DATE: May 1993
SECTION: 9A, 1C, 3F, 8A
SUBJECT:
INFORMATION ON NEW SERVICE TOOL AND ENHANCED DIAGNOSTICS FOR OPTICAL REDUNDANT STEERING WHEEL CONTROL
SYSTEMS
MODEL/YEARS:
1989-93 CUTLASS SUPREME
Tool Information
A new essential tool (J37608-92) was released in November of 1992 to all Oldsmobile dealerships. The new tool consists of three individual jumper
harnesses that work in conjunction with the Steering Wheel Control Adapter (J37608). The tools mentioned above are used in diagnosing Optical
Steering Wheel Control (SWC) systems. They are not used for Analog SWC systems.
The purpose of the new tool is to allow for isolation of the different Optical SWC components. The purpose of each tool:
J37608 (Steering Wheel Control Adapter) - This tool can connect (to the cancel cam assembly, E & C Interface Module) in parallel to the Cancel Cam
Assembly, the E & C Interface Module, the Turn Signal Switch, and the SWC assembly or keypad. It allows for voltage measurements to be taken on
any of the SWC power, ground, illumination, or data lines.
J37608-92A (Jumper Harness) - This jumper harness connects to the vehicle connector that plugs into the E & C Interface Module. This allows for
Battery, Ground, and the E & C Data line (CKT 835) to be connected to the SWC Adapter; which can power up the SWC assembly or keypad and the E
& C Interface module. Thus, the Cancel Cam Assembly and Turn Signal Switch can be bypassed and allow for testing of the E & C Interface Module
and the SWC assembly or keypad.
J37608-92B (Jumper Harness) - This jumper harness allows Data In and Data Out messages to be sent without the Cancel Cam Assembly and the Turn
Signal Switch in the system. When bypassing these components, if the SWC problem disappears; a problem exists with either the Cancel Cam Assembly
or the Turn Signal Switch. If the problem remains, the fault is due to one of the remaining SWC components.
J37608-92C (Jumper Harness) - This jumper harness has a connector similar to the Data Link Connector (DLC) which the TECH 1 can be connected to
and a ground wire which provides proper grounding of the TECH 1. The TECH 1 is used to monitor Entertainment & Comfort (E & C) data messages
that are sent from the SWC assembly, SWC keypad, HVAC assembly and the Radio or to simulate the SWC assembly or keypad by sending messages
through the SWC components.
CUTLASS SUPREME
Use the new diagnostic information included here in place of that in the 1989 Cutlass Supreme Service manual Section 8A-150 (SWC only) and 1990-93
Cutlass Supreme Service Manual/supplements section 8A-89.
The following updated information applies to the Delco Electronics Sound Service Audio Systems Diagnostics Guide. (6-92 Version)
When using the Delco Electronics Sound Service Audio Systems Diagnostics Guide to diagnose optical Steering Wheel Control complaints:
Refer to pages (5-43 - 5-53) for the symptom table and diagnostic charts.
Refer to pages (5-54 - 5-56) for jumper harness connection instructions.
Refer to pages (2-17 - 2-20) for component and circuit descriptions.
Revisions to the Delco Electronics Sound Service Audio Systems Diagnostics Guide.
Important:
To avoid misdiagnosis, after selecting the appropriate symptom from the symptom table, refer to these revisions for the appropriate chart.
Chart 1 Thru 6 Usage
All Charts
