SECTION 6C3 - POWERTRAIN MANAGEMENT

GEN III V8 ENGINE

INTRODUCTION

NOTE: Var ious com ponent specif ications and system oper ating param eters are detailed in this Ser vice Infrom ation

CD. T hey are correct at the start of vehicle production and are subj ect to change. Always ref er to Service Bulletins

for the latest information.

This Section of the Service Information CD is divided into the following six Sections.

6C3-1, GENERAL DESCRIPTION - This Section contains a General Description of the powertrain management

system and describes how the Powertrain Control Module (PCM) controls and monitors various systems. This

Section also contains the Abbreviations and Glossary of Terms.

6C3-2, DIAGNOSIS AND TECH 2 - This is the Section to begin all driveability and emissions diagnosis. Diagnostic

precautions, a gener al des cr iption of diagnos tic s and the Tech 2 s c an tool, as well as data lists and des c riptions are

included in this Section.

6C3-2A, DIAGNOSTIC TABLES - This is the Section where all Diagnostic procedures are located. System

com ponent locations , wire colours and wiring diagrams for PCM contr olled and monitored c ircuits are loc ated here.

Included are the following diagnostic tables (and how to use them):

Powertrain Control Module (PCM)

• Powertrain OBD system check

• Diagnostic tables: Check Powertrain Lamp (CPL), Data Link Connector, Engine Cranks But Does Not Run,

EFI Relay Diagnosis, Fuel Pump Electrical Circuit, Fuel Delivery System, Starter Cranking Circuit.

• Diagnostic Trouble Code (DTC) PCM tables: P0101, P0102, P0103, P0107, P0108, P0112, P0113, P0117,

P0118, P0121, P0122, P0123, P0125, P0131, P0132, P0133, P0134, P0135, P0151, P0152, P0153, P0154,

P0155, P0171, P0172, P0174, P0175, P0218, P0230, P0325, P0327, P0332, P0335, P0336, P0341, P0342,

P0343, P0351, P0352, P0353, P0354, P0355, P0356, P0357, P0358, P0443, P0481, P0502, P0503, P0506,

P0507, P0522, P0523, P0530, P0562, P0563, P0601, P0602, P0608, P0654, P0705, P0706, P0711, P0712,

P0713, P0719, P0724, P0740, P0742, P0748, P0751, P0753, P0756, P0758, P0785, P1111, P1112, P1114,

P1115, P1121, P1122, P1133, P1134, P1153, P1154, P1258, P1539, P1546, P1626, P1630, P1631, P1635,

P1639, P1810, P1860, P1870.

Powertrain Interface Module (PIM)

• Diagnostic Trouble Code (DTC) PIM tables: B2002, B2006, B2007, B2009

This Section also c ontains the Powertrain O BD System Check ; the s tarting point of all diagnostics. If the Powertrain

OBD System Check shows a diagnostic trouble code is set in the PCM's memory, this Section is where the

diagnostic trouble codes are diagnosed.

If more than one diagnostic trouble code is stored, always diagnose and correct the lowest stored number before

going on to the next higher number diagnostic trouble code.

6C3-2B, SYMPTOMS - When no diagnostic trouble code(s) have been set and the Tech 2 scan tool data values

are within typical ranges, you should diagnose the condition based on the symptoms of the complaint.

This Section star ts with prelim inary checks that m ust be per form ed to diagnos e by symptom . Interm ittent conditions

are then discussed. These preliminary pages provide important information to assist you with symptom diagnosis.

Next, the contents of this Section presents the various symptoms and lists a series of checks for each.

Many of the symptom diagnostics start with a very important procedure, a visual and physical inspection. Always

look f or the obvious f irs t. Some situations may warrant observing the driver. Is the dr iver us ing the c orr ec t shif t lever

position or riding the brake pedal? Visually check the engine, transmission, PCM/ PIM connectors. Are there any

disconnected wires or incorrectly installed components?

Finally, are there obvious signs that som eone may have perf ormed incorrect repairs? These checks take very little

time and can elim inate the tim e s pent on a broad-bas e systematic diagnosis by directing you to the problem. If they

do not reveal the problem, proceed to check the other suspect systems, as shown.

6C3-2C, FUNCTIONAL CHECKS - This Section contains system checks that are to be used when there is a

custom er com plaint, no Diagnostic Trouble Codes s et, but one or m ore of the T ech 2 scan tool data values are not

within specification. Before using these tables you should use the symptoms tables in the previous Section. That

may lead you to this Section.

The purpose of the tables in this Section is to diagnos e powertrain contr ol m odule com ponents or sub s ys tem s that

do not have diagnostic trouble c odes assigned to them . Another purpos e of these tables is for technic ians who feel

confident that a par ticular part of the sub system is not oper ating correct ly and wants to only check that a particular

item without going through lengthy diagnostic procedures.