Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual — part 765
6E–84
TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Tech 2
Parameter
Refer To
Typical Data
Values
(2500 RPM)
Typical Data
Values (IDLE)
Units Displayed
Data List
HO2S Bank 2
Sen.1
(millivolts)
O2
Sensor
Data
Millivolts
50-950
changing
quickly
50-950
changing
quickly
General Description and
Operation, Fuel Control
HO2S
HO2S Bank 2
Sen.2
(millivolts)
(Auto trans)
O2
Sensor
Data
Millivolts
200-700
changing slowly
250-650
changing slowly
General Description and
Operation, Fuel Metering
System
HO2S Bank 1
Sen.1
(ready/not
ready)
O2
Sensor
Data
Ready
Yes/No
Ready
Yes
Ready
Yes
General Description and
Operation, Fuel Control
HO2S; DTC: P0135
HO2S Bank 2
Sen.1
(ready/not
ready)
O2
Sensor
Data
Ready
Yes/No
Ready
Yes
Ready
Yes
General Description and
Operation, Fuel Control
HO2S
HO2S
Warm-Up Time
Bank 1 Sen.1
O2
Sensor
Data
Seconds
25-45
25-45
General Description and
Operation, Fuel Control
HO2S
HO2S
Warm-Up Time
Bank 1 Sen.2
O2
Sensor
Data
Seconds
60-100
60-100
General Description and
Operation, Fuel Control
HO2S
HO2S
Warm-Up Time
Bank 2 Sen.1
O2
Sensor
Data
Seconds
25-45
25-45
General Description and
Operation, Fuel Control
HO2S
HO2S
Warm-Up Time
Bank 2 Sen.2
O2
Sensor
Data
Seconds
60-100
60-100
General Description and
Operation, Catalyst
Monitor Heated Oxygen
Sensor (Auto Trans)
IAT (Intake Air
Temp)
Engine
Degrees C,
Degrees F
0-100
°
C,
depends on
underhood
temperature
0-80
°
C,
depends on
underhood
temperature
General Description and
Operation, Intake Air
Temperature (IAT) Sensor
Illumination
Switch
Engine
Closed 0V/Open
12V
Closed 0V
Closed 0V
Refer to Section 8
Ignition
Voltage
Engine
Volts
12.8-14.1
12.8-14.1
General Description and
Operation, Electronic
Ignition System
Inj. Pulse Bank
1
Engine
Milliseconds
2.0-4.0
2.5-4.0
General Description, Fuel
Metering, Fuel Injector
Inj. Pulse Bank
2
Engine
Milliseconds
2.0-4.0
2.5-4.0
General Description, Fuel
Metering, Fuel Injector
Knock Present
Engine
No/Yes
No
No
General Description and
ION Sensing Module
Knock Signal
Engine
Percent
1
∼
4
1
∼
4
General Description and
ION Sensing Module
Knock Sensor
Retard
Engine
°
CA
0
0
General Description and
ION Sensing Module
Knock Counter
Engine
Counts
—
—
General Description
Long Term FT
Bank 1 (Long
Term Fuel
Trim)
Misfire
Counts and
Percentage
100 to 150
counts, –22%
to +17%
100 to 150
counts, –22%
to +17%
Diagnosis, Fuel Trim
System Monitor; DTCs:
P0171, P0172
6E–85
TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Tech 2
Parameter
Refer To
Typical Data
Values
(2500 RPM)
Typical Data
Values (IDLE)
Units Displayed
Data List
Long Term FT
Bank 2 (Long
Term Fuel
Trim)
Misfire
Counts and
Percentage
100 to 150
counts, –22%
to +17%
100 to 150
counts, –22%
to +17%
Diagnosis, Fuel Trim
System Monitor; DTCs:
P0171
MAF (Mass Air
Flow)
Engine
Grams per
second
3.0-7.0
12-20
General Description and
Operation, MAF; DTCs:
P101, P0102, P0103
MAP kPa
(Manifold
Absolute
Engine
Kilopascals
25-35
20-30
General Description and
Operation, Manifold
Absolute Pressure (MAP)
Absolute
Pressure)
Volts
0.8-1.3
0.5-1.0
Absolute Pressure (MAP)
Sensor; DTCs: P0106,
P0107, P0108
MIL
Engine
On/Off
Off
Off
On-Board Diagnostic
System Check
Misfire Cur. Cyl
#1
Misfire
Counts
0-2
0-2
DTC P0300
Misfire Cur. Cyl
#2
Misfire
Counts
0-2
0-2
DTC P0300
Misfire Cur. Cyl
#3
Misfire
Counts
0-2
0-2
DTC P0300
Misfire Cur. Cyl
#4
Misfire
Counts
0-2
0-2
DTC P0300
Misfire Cur. Cyl
#5
Misfire
Counts
0-2
0-2
DTC P0300
Misfire Cur. Cyl
#6
Misfire
Counts
0-2
0-2
DTC P0300
Misfire Hist.
Cyl #1
Misfire
Counts
0
0
DTC P0300
Misfire Hist.
Cyl #2
Misfire
Counts
0
0
DTC P0300
Misfire Hist.
Cyl #3
Misfire
Counts
0
0
DTC P0300
Misfire Hist.
Cyl #4
Misfire
Counts
0
0
DTC P0300
Misfire Hist.
Cyl #5
Misfire
Counts
0
0
DTC P0300
Misfire Hist.
Cyl #6
Misfire
Counts
0
0
DTC P0300
Misfire Failures
Since First Fail
Misfire
Counts
0
0
DTC P0300
Misfire Passes
Since First Fail
Misfire
Counts
0
0
DTC P0300
PNP
(Park/Neutral
Position)
Engine
P-N /
R-D-3-2-L
P-N
P-N
4L30-E Automatic
Transmission Diagnosis
Power
Enrichment
Engine
NO/YES
NO
NO
General Description and
Operation, Acceleration
Mode
PSP Switch
(Power
Steering
Pressure)
Engine
Normal/Hi
Normal
Pressure
Normal
Pressure
Refer to 2A Section
6E–86
TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Tech 2
Parameter
Refer To
Typical Data
Values
(2500 RPM)
Typical Data
Values (IDLE)
Units Displayed
Data List
Spark
(Advance)
Engine
Degrees Before
Top Dead Center
15-22
34-44
General Description and
Operation, Electronic
Ignition System
Start-Up ECT
(Engine
Coolant Temp)
Engine
Degrees C,
Degrees F
Depends on
engine coolant
temperature at
time of start-up
Depends on
engine coolant
temperature at
time of start-up
General Description and
Operation, Engine
Coolant Temperature
(ECT) Sensor
Start-Up IAT
(Intake Air
Temp)
Engine
Degrees C,
Degrees F
Depends on
intake air
temperature at
time of start-up
Depends on
intake air
temperature at
time of start-up
General Description and
Operation, Intake Air
Temperature (IAT) Sensor
TCC Cruise
Brake Switch
Engine
Active/Inactive
Active
Active
Refer to Section 10
Total Misfire
Current Count
Misfire
Counts
0-5
0-5
DTC P0300
TP Sensor 1
(Throttle
Position
Sensor 1)
Engine
Percentage
6–12
12–16
General Description and
Operation, Throttle
Position (TP) Sensor
TP Sensor 2
(Throttle
Position
Sensor 2)
Engine
Percentage
88–94
86–90
General Description and
Operation, Throttle
Position (TP) Sensor
Throttle at Idle
Engine
No/Yes
Yes
No
General Description and
Operation, Throttle
Position (TP) Sensor
Upshift Lamp
(manual trans)
Engine
On/Off
Off
Off
Manual Transmission
Vehicle Speed
Engine
MPH / km/h
0
0
4L30-E Automatic
Transmission Diagnosis
Weak Cylinder
Misfire
Cylinder #
—
—
DTC P0300
6E–87
TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
No Malfunction Indicator Lamp (MIL)
D06R200083
Circuit Description
The “Check Engine” lamp (MIL) should always be
illuminated and steady with the ignition “ON” and the
engine stopped. Ignition feed voltage is supplied to the
MIL bulb through the meter fuse. The powertrain control
module (PCM) turns the MIL “ON” by grounding the MIL
driver circuit.
Diagnostic Aids
An intermittent MIL may be cased by a poor connection,
rubbed-through wire insulation, or a wire broken inside
the insulation. Check for the following items:
D
Inspect the PCM harness and connections for
improper mating, broken locks, improperly formed or
damaged terminals, poor terminal-to-wire
connection, and damaged harness.
D
If the engine runs OK, check for a faulty light bulb, an
open in the MIL driver circuit, or an open in the
instrument cluster ignition feed.
D
If the engine cranks but will not run, check for an open
PCM ignition or battery feed, or a poor PCM to engine
ground.
Test Description
Number(s) below refer to the step number(s) on the
Diagnostic Chart.
2. A “No MIL” condition accompanied by a no-start
condition suggests a faulty PCM ignition feed or
battery feed circuit.
9. Using a test light connected to B+, probe each of the
PCM ground terminals to ensure that a good ground
is present. Refer to
PCM Terminal End View for
terminal locations of the PCM ground circuits.
12.In this step, temporarily substitute a known good
relay for the PCM relay. The horn relay is nearby,
and it can be verified as “good” simply by honking
the horn. Replace the horn relay after completing
this step.
17.This vehicle is equipped with a PCM which utilizes
an electrically erasable programmable read only
memory (EEPROM). When the PCM is replaced,
the new PCM must be programmed. Refer to
PCM
Replacement and Programming Procedures
Powertrain Control Module (PCM) and Sensors.
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