Diagnostic Connector - Service Bay Diagnostic System
Article No.93-20-4
09/29/93
^ SERVICE BAY DIAGNOSTIC SYSTEM - REMOVAL OF TACH WIRE FROM VIP/SELF TEST (DLC) CONNECTOR TO AVOID DAMAGE TO SBDS - THUNDERBIRD/COUGAR WITH 5.0L, BRONCO, F-150-350, ECONOLINE WITH 5.0L/5.8L, AEROSTAR WITH 2.3L, 2.8L, 3.0L
^ WIRING - REMOVAL OF TACH WIRE FROM VIP/SELF TEST (DLC) CONNECTOR TO AVOID DAMAGE TO SBDS - THUNDERBIRD/COUGAR WITH 5.0L, BRONCO, F-150-350, ECONOLINE WITH 5.0L/5.8L, AEROSTAR WITH 2.3L, 2.8L, 3.0L
^ SBDS DAMAGE-REMOVAL OF TACH SIGNAL WIRE FROM VIP/SELF TEST (DLC) CONNECTOR - THUNDERBIRD/COUGAR WITH 5.0L, BRONCO, F-150-350, ECONOLINE WITH 5.0L/5.8L, AEROSTAR WITH 2.3L, 2.8L, 3.0L
FORD:
1986-88 THUNDERBIRD
LINCOLN-MERCURY:
1986-88 COUGAR
LIGHT TRUCK:
1986 BRONCO, F-150-350 SERIES
1986-87 ECONOLINE
1986-91 AEROSTAR
ISSUE:
The VIP/Self-Test (DLC) connector on certain model year Ford and Lincoln/Mercury vehicles should not be connected to the SBDS without modification or damage will occur to the SBDS. Refer to the following for service details.
ACTION:
Remove the tach signal wire from the VIP/Self-Test connector before connecting to the SBDS.
The VIP/Self-test (DLC) connector on these vehicles contains a tach wire that generates a voltage spike that damages the MCVI circuit board in the SBDS. The damage will become evident when SBDS tools that utilize the Data Communications Link (DCL) are used later, on a vehicle equipped with DCL. Refer to the following detailed service procedure for information.
1. Inspect the vehicle's VIP/Self-Test connector for the presence of a tach signal wire. Refer to Figure 1.
2. If a tach wire is present, remove it. Using a small flat bladed screwdriver, depress the plastic retaining tab that locks the terminal into the connector. Hold down the tab and pull the wire from the connector.
3. Wrap the terminal so that no part of it is exposed, using a moisture proof tape such as Scotch 3M Linerless Splicing Compound (3M # 06155).
4. If the terminal contains two wires, loop the tape between and around the terminal and the wires to completely seal the wire terminal from moisture.
5. Secure the wrapped terminal to the wiring harness using a wire-tie (95832-S) to prevent it from being damaged.
Parts Block
NOTE:
1985 AND PRIOR MODEL YEAR VEHICLES ARE NOT TOTALLY SUPPORTED BY SBDS AND HAVE A HIGH PROBABILITY OF DAMAGING THE SBDS MVCI HARDWARE DUE TO THIS ISSUE. DO NOT CONNECT THE VIP/SELF-TEST CONNECTOR TO SBDS TO RUN ELECTRONIC ENGINE CONTROL OR FUEL SYSTEM TESTS. ALL OTHER TOOLS THAT DO NOT REQUIRE HOOK-UP TO THE VIP/SELF-TEST CONNECTOR WILL FUNCTION NORMALLY.
OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS:
Eligible Under Bumper To Bumper Warranty Coverage
OPERATION DESCRIPTION TIME
932004A Remove Tach Wire From 0.2 Hr.
VIP Self-Test Connector
DEALER CODING
BASIC PART NO. CONDITION CODE
14488 X1
OASIS CODES: 203000, 203200