TCC - Code 39 Diagnostic Information: Overview

Bulletin No. T 84-46
File In Group 7
Number 94
Date Feb. '84

SUBJECT: DIGITAL FUEL INJECTION (DFI) CODE 39 ([1][2]TORQUE CONVERTER CLUTCH) DIAGNOSIS

MODELS AFFECTED: 1982-1984 WITH HT4100 ENGINES


This bulletin provides service information to aid in diagnosing and in repairing Torque Converter Clutch (TCC) related conditions (commonly reported as Code 39) on 1982-1984 model Cadillacs equipped with HT4100 engines.

^ Section I lists the names and functions of an [1][2]Torque Converter Clutch Components.
^ Section II covers vehicle operating conditions required to enable (allow the operation of) TCC.
^ Section III describes the events that take place when the TCC Applies.
^ Section IV describes the conditions required for the Electronic Control Module (ECM) to test for Code 39.
^ Section V covers Electrical and Hydraulic Diagnosis of the TCC system.

The information provided in this bulletin is intended to supplement the information that is provided in the appropriate model year Service Information Manuals.