2002 ISUZU AXIOM ABS

6E±586
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Electrical Components
The electrical components that make up the enhanced
EVAP system are:

Fuel Tank (Vapor) Pressure Sensor. The fuel tank
pressure sensor is a three-wire strain gauge sensor
similar to a common MAP sensor. However, the fuel
tank pressure sensor has very different electrical
characteristics due to its pressure differential design.
The sensor measures the difference between the air
pressure (or vacuum) in the fuel tank and the outside
air pressure.
The sensor mounts at the top of the fuel pump
assembly. A three-wire electrical harness connects it to
the PCM. The PCM supplies a five-volt reference
voltage and a ground to the sensor. The sensor will
return a voltage between 0.1 and 4.9 volts. When the
air pressure in the fuel tank is equal to the outside air
pressure, such as when the fuel cap is removed, the
output voltage of the sensor will be 1.3 to 1.7 volts.
When the air pressure in the fuel tank is 4.5 in. H2O
(1.25 kPa), the sensor output voltage will be 0.5 + 0.2 V.
When there is neither vacuum nor pressure in the fuel
tank, the sensor voltage will be 1.5 V. At ±14 in. H2O
(±3.75 kPa), the sensor voltage will be 4.5 + 0.2 V.

EVAP Canister Purge Solenoid. Normally closed, the
purge solenoid opens upon the PCM's signal to allow
engine vacuum to purge gasoline fumes from the
canister. Mounted on the water pipe to front of the
engine assembly.
060R200080

EVAP Canister Vent Solenoid. Located next to the
canister, the vent solenoid opens to allow air into the
EVAP system. Fresh air is necessary to completely
remove gasoline fumes from the canister during
purge. The EVAP vent solenoid closes to seal off the
evaporative emissions system for leak testing.
060R200081

Fuel Level Sensor. The fuel level sensor is an
important input to the PCM for the enhanced EVAP
system diagnostic. The PCM needs fuel level
information to know the volume of fuel in the tank.
The fuel level affects the rate of change of air
pressure in the EVAP system. Several of the
enhanced EVAP system diagnostic sub-tests are
dependent upon correct fuel level information. The
diagnostic will not run when the tank is less than 15%
or more than 85% full. Be sure to diagnose any Fuel
Level Sensor DTCs first, as they can cause other
DTCs to set.
014RW114

Manifold Absolute Pressure (MAP) Sensor. The
PCM compares the signals from the fuel tank
pressure sensor and the MAP sensor to ensure that a
relative vacuum is maintained the EVAP system.

7A1±6
TRANSMISSION CONTROL SYSTEM (4L30±E)
Shift Control
The transmission gear is shifted according to the shift
pattern selected by the driver. In shifting gears, the gear
ratio is controlled by the ON/ OFF signal using the shift
solenoid A and the shift solenoid B.
Band Apply Control
The band apply is controlled when in the 3±2 downshift
(engine overrun prevention) and the garage shift (shock
control).
The band apply solenoid is controlled by the signal from
the Pulse Width Modulation (PWM) to regulate the flow of
the oil.
Torque Converter Clutch Control
(Electronically Controlled Capacity Clutch
= ECCC)
The clutch apply is controlled by moving the converter
clutch valve by commanding Torque Converter Clutch
(TCC) solenoid using the PWM signal.
Line Pressure Control
The throttle signal allows the current signal to be sent to
the force motor. After receiving the current signal, the
force motor activates the pressure regulator valve to
regulate the line pressure.
On±Board Diagnostic System
Several malfunction displays can be stored in the
Powertrain Control Module (PCM) memory, and read out
of it afterward.
The serial data lines, which are required for the testing of
the final assembly and the coupling to other electronic
modules, can be regulated by this function.
Fail Safe Mechanism
If there is a problem in the transmission system, the PCM
will go into a ªbackupº mode.
The vehicle can still be driven, but the driver must use the
select lever to shift gears.
Torque Management Control
The transmission control side sends the absolute spark
advance signal to the engine control side while the
transmission is being shifted. This controls the engine
spark timing in compliance with the vehicle running
condition to reduce the shocks caused by the change of
speed.
ATF Warning Control
The oil temperature sensor detects the ATF oil
temperature to control the oil temperature warning, TCC,
and the winter mode.
Reverse Lock Out Control
With the selector lever in reverse position, the PCM will
not close the PWM solenoid until the vehicle is below 11
km/h (6.8 mph), thus preventing reverse engagement
above this speed.
Downhill Control
This mode is automatically activated from ªNORMALº
mode only when downhill conditions are recognized.
The shift pattern is identical to ªNORMALº mode except
3-4 and 4-3 shift lines at low throttle modified to get engine
braking on a larger speed range.
ECCC lines unchanged compared to ªNORMALº mode.
Uphill Control
When Uphill condition are recognized the 2-3 and 3-4 shift
and TCC apply take place only when the engine torque is
sufficient in order to avoid shift hunting.

7A1±18
TRANSMISSION CONTROL SYSTEM (4L30±E)
Transmission Data
Tech 2 stringUnitEngine running at idle
Ignition VoltageV12.8 ~ 14.1 V
Engine SpeedRPM750 ~ 900 RPM
Vehicle Speedkm/h, MPH0 MPH
AT Output Speed (Automatic Transmission)RPM0 RPM
AT Input Speed Ratio (Automatic Transmission)0.0
Throttle Position%0 %
AT Oil Temperature (Automatic Transmission)
C,
F70 ~ 80
C (158 ~ 176
F)
Transmission Temperature
C,
F75 ~ 11 0
C (167 ~ 230
F)
AT Oil Temperature Lamp (Automatic Transmission)On/OffOff
AT Oil Life Monitor (Automatic Transmission)%100 %
AT Oil Life Lamp (Automatic Transmission)On/Off(Not used)
Commanded Gear1
Current Gear1
Mode Switch AInactive/ActiveActive
Mode Switch BInactive/ActiveInactive
Mode Switch CInactive/ActiveInactive
Mode Switch GInactive/ActiveActive
Selector PositionPark
1±2 Shift Solenoid AOn/OffOff
2±3 Shift Solenoid BOn/OffOn
Solenoid Brake BandOn/OffOff
TCC Slip SpeedRPM750 ~ 900 RPM
TCC SolenoidOn/OffOff
TCC Duty Cycle%0 %
PCS Current (Pressure Control Solenoid)Aapprox. 1.0 A
PCS Duty Cycle (Pressure Control Solenoid)%approx. 45 ~ 60 %
Desired PCS Pressure (Pressure Control Solenoid)kPa43 ~ 52 kPa
Shift PressurekPa43 ~ 52 kPa
Brake SwitchOn/OffOn
Winter SwitchOn/OffOff
Winter Drive LampOn/OffOff
Power SwitchNormalNormal
Power Drive LampOff/OnOff
Emergency ModeInactive/ActiveInactive
ABS StatusOn/Off(Not used)

TRANSMISSION CONTROL SYSTEM (4L30±E)7A1±21
810RT022
PIN 1 ± DIAG. SW
PIN 2 ± J1850 Bus + L line on 2±wire systems, or
single wire (Class 2)
PIN 3 ± Active suspension diagnostic enable
PIN 4 ± Chassis ground pin
PIN 5 ± Signal ground pin
PIN 6 ± (Not used)
PIN 7 ± TOD diagnostic enable
PIN 8 ± TOD diagnostic enable
PIN 9 ± Primary UART
PIN 10 ± (Not used)
PIN 11 ± (Not used)
PIN 12 ± ABS diagnostic or CCM diagnostic enable
PIN 13 ± SIR diagnostic enable
PIN 14 ± (Not used)
PIN 15 ± (Not used)
PIN 16 ± Battery power from vehicle unswitched (4
AMP MAX.)
Malfunction Indicator Lamp (MIL)
The Malfunction Indicator Lamp (MIL) looks the same as
the MIL you are already familiar with (ªCHECK ENGINEº
lamp). However, OBD II requires for it illuminate under a
strict set of guidelines. Basically, the MIL is turned on
when the PCM detects a DTC that will impact the vehicle's
emissions.
The MIL is under the control of the Diagnostic Executive.
The MIL will be turned on if a component or system which
has an impact on vehicle emissions indicates a
malfunction or fails to pass an emissions±related
diagnostic test. It will stay on until the system or
component passes the same test, for three consecutive
trips, with no emissions±related faults.
DTC Types
Each DTC is directly related to a diagnostic test. The
Diagnostic Management System sets DTC based on the
failure of the tests during a trip or trips. Certain tests must
fail two (2) consecutive trips before the DTC is set. The
following are the four (4) types of DTCs and the
characteristics of those codes:

Type A

Emissions related

Requests illumination of the MIL of the first trip with a
fail

Stores a History DTC on the first trip with a fail

Stores a Freeze Frame (if empty) (DTC Information
for 6VE1 engine)

Stores a Fail Record

Updates the Fail Record each time the diagnostic
test fails

Type B

Emissions related

ªArmedº after one (1) trip with a fail

ªDisarmedº after one (1) trip with a pass

Requests illumination of the MIL on the
second
consecutive trip
with a fail

Stores a History DTC on the second consecutive trip
with a fail (The DTC will be armed after the first fail)

Stores a Freeze Frame on the second consecutive
trip with a fail (if empty) (DTC Information for 6VE1
engine)

Stores a Fail Record when the first test fails (not
dependent on
consecutive trip fails)

Updates the Fail Record each time the diagnostic
test fails
(Some special conditions apply to misfire and fuel trim
DTCs)

Type C (if the vehicle is so equipped)

Non-Emissions related

Requests illumination of the Service Lamp or the
service message on the Drive Information Center
(DIC) on the
first trip with a fail

Stores a History DTC on the
first trip with a fail


Does not store a Freeze Frame

Stores Fail Record when test fails

Updates the Fail Record each time the diagnostic
test fails

Type D

Non-Emissions related

Not request illumination of any lamp

Stores a History DTC on the
first trip with a fail


Does not store a Freeze Frame

Stores Fail Record when test fails

Updates the Fail Record each time the diagnostic
test fails

8A±22LIGHTING SYSTEM
Light NameBulb No.Rated
PowerNumber of
BulbsLens ColorRemarks
Headlight9005/900660w/51w2WhiteHalogen
Front Turn signal Light/
Front Side Marker Light/Parking Light1157NA27w/8w2Amber
Rear Turn Signal Light744021w2Amber
Backup Light92118w2White
Taillight/Stoplight744321w/5w2Red
High Mounted Stoplight92118w2Red
License Plate Light (Tailgate type)1685w2White
Map LightÐ8w2White
Dome LightÐ10w1White
Luggage Room LightÐ5w1White
Courtesy LightÐ3.4w4White
Check TransÐ1.4w1RedMeter
A/T Oil TempÐ1.4w1RedMeter
Cruise SetÐ1.4w1GreenMeter
Power DriveÐ1.4w1AmberMeter
Winter DriveÐ1.4w1GreenMeter
Turn SignalÐ1.4w2GreenMeter
Check TODÐ1.4w1RedMeter
High BeamÐ1.4w1BlueMeter
ABSÐ1.4w1AmberMeter
Seat BeltÐ2w1RedMeter
Indicator/Warning
Malfunction Indicator
(Check Engine)Ð1.4w1AmberMeter
Indicator/Warning
LightLow FuelÐ1.4w1AmberMeterg
Reduced PowerÐ1.4w1AmberMeter
Sports ModeÐ1.4w1GreenMeter
TOD FrontÐ1.1w1GreenMeter
TOD AutoÐ1.1w1GreenMeter
TOD RearÐ1.1w1GreenMeter
Oil PressureÐ1.4w1RedMeter
Brake SystemÐ1.4w1RedMeter
ChargeÐ1.4w1RedMeter
A/T Shift PositionÐ1.1w7
P,N,D,3,2,L
:Green
R: Amber
Meter
Air BagÐ2w1RedMeter
Illumination LightMeterÐ3.4w4Meter
Shift leverÐ1.4w1WhiteShift lever
Vanity MirrorÐ2w2WhiteSun Visor
Cigarette LighterÐ1.4w1WhiteCigarette
Lighter
AshtrayÐ1.4w1WhiteAshtray

8D±1
WIRING SYSTEM
AXIOM
BODY AND ACCESSORIES
WIRING SYSTEM
CONTENTS
Fuse, Relay and Diode 8D±2. . . . . . . . . . . . . . . . . . .
Relay / Fuse Box Location 8D±2. . . . . . . . . . . . . .
Relay / Fuse Box (Instrument Panel) 8D±3. . . . .
Relay / Fuse Box (Engine Room) 8D±4. . . . . . . .
Circuit Diagram 8D±5. . . . . . . . . . . . . . . . . . . . . . . . .
Fuse Block Circuit 8D±5. . . . . . . . . . . . . . . . . . . . .
Ground Location (Engine Room) 8D±6. . . . . . . .
Ground Location (Cabin) 8D±7. . . . . . . . . . . . . . .
Starter and Generator 8D±8. . . . . . . . . . . . . . . . . .
PCM±1 8D±9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PCM±2 8D±10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headlight and Fog Light 8D±11. . . . . . . . . . . . . . . .
Turn, Hazard, Stop, Back Up, Horn and
A/T Shift Lock 8D±12. . . . . . . . . . . . . . . . . . . . . . . .
Dome Light, Luggage Room Light, Courtesy
Light, Spot Light, and Warning Buzzer 8D±13. . .
Power Window and Door Lock 8D±14. . . . . . . . . .
Alarm and Relay Control Unit 8D±15. . . . . . . . . . . Rear Wiper/Washer and Rear Defogger 8D±16. .
Audio, Clock, Cigarette Lighter and
ACC Socket 8D±17. . . . . . . . . . . . . . . . . . . . . . . . . .
MID 8D±18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Door Mirror 8D±19. . . . . . . . . . . . . . . . . . . . . . . . . . .
Meter 8D±20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Anti-theft with Keyless Entry 8D±21. . . . . . . . . . . .
Air Conditioning 8D±22. . . . . . . . . . . . . . . . . . . . . . .
ABS 8D±23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SRS±Air Bag 8D±24. . . . . . . . . . . . . . . . . . . . . . . . . .
Intelligent Suspension 8D±25. . . . . . . . . . . . . . . . . .
T.O.D 8D±26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sunroof 8D±27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Illumination Light 8D±28. . . . . . . . . . . . . . . . . . . . . .
Windshield Wiper and Washer 8D±29. . . . . . . . . .
Power Seat 8D±30. . . . . . . . . . . . . . . . . . . . . . . . . . .
Seat Heater 8D±31. . . . . . . . . . . . . . . . . . . . . . . . . . .

8D±4
WIRING SYSTEM
Relay / Fuse Box (Engine Room)
D08R200046
Legend
(1) Fuse/Relay Box
(2) Option Box
(3) Diode (Not Used)
(4) Diode
(5) Heater Relay
(6) A/C Compressor Relay
(7) Headlamp Relay RH
(8) Not Used
(9) Fog Lamp Relay
(10) Not Used
(11) Not Used
(12) Thermo Relay
(13) Headlamp Relay LH
(14) Starter Relay
(15) ECM Main
(16) Fuel Pump Relay
(17) Not Used
(18) IG.1 (+B.1 60A)
(19) Main (100A)(20) ECM (30A)
(21) ABS (50A)
(22) IG.2 (+B.2 50A)
(23) Condenser Fan (30A)
(24) Hazard (15A)
(25) Horn (10A)
(26) ACG±S (10A)
(27) Seat Heater (15A)
(28) Blower (15A)
(29) Blower (15A)
(30) A/C (10A)
(31) Headlamp±LH (20A)
(32) Headlamp±RH (20A)
(33) Fog Lamp (15A)
(34) O
2 Sensor (20A)
(35) Fuel Pump (20A)
(36) ECM (15A)
(37) TOD (15A)
(38) Intelligent Suspension Relay (30A)
(39) Condenser Fan Relay

8D±23
WIRING SYSTEM
ABS
D08R200008