SECTION 6C1 - POWERTRAIN MANAGEMENT -
V6 ENGINE
INTRODUCTION
NOTE:
Various component specifications and system operating parameters are detailed of the VX Series Service
Information. They are correct at the start of vehicle production and are subject to change. Always refer to Service
Bulletins for latest information.
This Section of the Service Information is divided into the following six Sections.
6C1-1, 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.
6C1-2, DIAGNOSIS AND TECH 2 - This is the Section to begin all driveability and emiss ions diagnosis. Diagnos tic
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 descr iptions are
included in this Section.
6C1-2A, DIAGNOSTIC TABLES - This is the Section where all Diagnostic procedures are located. System
com ponent locations , wire colours and wiring diagram s f or PCM controlled and m onitored circ uits are located here.
Included are the following diagnostic tables (and how to use them):
Powertrain Control Module (PCM)
• On Board Diagnostic (OBD) system check
• Diagnostic tables: No “ Chec k Powertrain” Malf unc tion Indic ator Lamp ( MIL), No Serial Data, Will Not Flash DTC
P0012, Malfunction Indicator Lamp (MIL) “Check Powertrain” Lamp “ON” Steady, Engine Cranks But Will Not
Run, Starter Cranking Circuit, Fuel Pump Electrical Circuit, Fuel Delivery System, MAF Sensor Output Check,
TP Sensor Output Check, Oxygen Sensor Check, Canister Purge Solenoid Check, EFI Relay Diagnosis, Idle
Air Control (IAC) Check, Direct Ignition System (DIS) System Check, A/C Clutch Control (Non-ECC System),
A/C Clutch Control with Electronic Climate Control (ECC), Electric Fan Control, Restricted Exhaust Check.
The following Diagnostic Trouble Codes (DTC) are for the V6 engine and V6 LPG engine system:
• Diagnostic Trouble Code (DTC) PCM tables: P0101, P0111, P0112, P0113, P0117, P0118, P0121, P0122,
P0123, P0131, P0132, P0134, P0151, P0152, P0154, P0170, P0173, P0200, P0218, P0325, P0327, P0332,
P0341, P0342, P0374, P0400, P0405, P0446, P0502, P0506, P0507, P0530, P0560, P0561, P0562, P0563,
P0601, P0712, P0713, P0730, P0740, P0741, P0748, P0753, P0758, P0785, P1064, P1116, P1255, P1351,
P1361, P1372, P1571, P1627, P1628, P1642, P1643, P1810, P1860, P1870.
6C1-2B, 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 corr ec t shif t lever
position or riding the brake pedal? Visually check the engine, transmission, PCM connectors.
Are there any disconnected wires or incorrectly installed components?
Finally, are there obvious signs that someone may have perform ed incorrect r epairs? These c hecks tak e very little
time and can elim inate the tim e spent on a br oad-base s ystematic diagnos is by directing you to the problem . If they
do not reveal the problem, proceed to check the other suspect systems, as shown.
6C1-2C, 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 purpos e of the tables in this Section is to diagnose powertrain control m odule components or subsystems that
do not have diagnostic trouble code assigned to them . Another purpose of these tables is for technicians who feel
confident that a particular part of the subsystem is not operating correc tly and wants to only check that a par ticular
item without going through lengthy diagnostic procedures.
6C1-3, SERVICE OPERATIONS - This Section describes service procedures for the major components and
sensors of the Powertrain Management System.
6C1-4, SPECIFICATIONS - This Section provides general specifications for components of the powertrain
management system.
6C1-5, TORQUE SPECIFICATIONS - Fastener tightening specifications.
6C1-6, SPECIAL TOOLS- This Section contains picture, part number, description and purpose of special tools
required to perform operations described in this Section.