Isuzu Rodeo UE. Service manual — part 331
6E2–79
RODEO 6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS
Tech 2
Parameter
Data List
Units
Displayed
Typical Data
Values (IDLE)
Typical Data
Values
(2500 RPM)
Refer To
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
Inactive/Ac
tive
Inactive
Inactive
General Description and
Operation, Acceleration
Mode
Rich/Lean Bank
1
Engine
Rich/Lean
Always
changing
Always
changing
General Description and
Operation, Fuel Control
HO2S
Rich/Lean Bank
2
Engine
Rich/Lean
Always
changing
Always
changing
General Description and
Operation, Fuel Control
HO2S
Shrt Term FT
Bank 1 (Short
Term Fuel Trim)
Engine
Counts
and
Percent
112 to 154
counts, –12% to
+20%
112 to 154
counts, –12% to
+20%
Diagnosis, Fuel Trim
System Monitor; DTCs:
P0171, P0172
Shrt Term FT
Bank 2 (Short
Term Fuel Trim)
Engine
Counts
and
Percent
112 to 154
counts, –12% to
+20%
112 to 154
counts, –12% to
+20%
Diagnosis, Fuel Trim
System Monitor; DTCs:
P0174, P0175
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)
Eng: HO2S
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)
Eng: HO2S
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 Engaged
(Torque
Converter
Clutch)
Engine
No/Yes
No
No
4L30-E Automatic
Transmission Diagnosis
Torque
Management
Engine
Inactive/Ac
tive
Inactive
Inactive
4L30-E Automatic
Transmission Diagnosis
Total Misfire
Current Count
Misfire
Counts
0-5
0-5
DTC P0300
TP (Throttle
Position)
Engine
Percent
0
—
General Description and
Operation, Throttle
Position (TP) Sensor;
DTCs: P0121,
P0122,P0123
TP Sensor
(Throttle
Position)
Engine
Volts
0.50-0.82
0.60-1.00
General Description and
Operation, Throttle
Position (TP) Sensor;
DTCs: P0121,
P0122,P0123
Catalyst
Protection Mode
Eng:
No/Yes
No
No
General Description, Fuel
Metering, catalytic
Converter Protection
Mode
6E2–80
RODEO 6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS
Tech 2
Parameter
Data List
Units
Displayed
Typical Data
Values (IDLE)
Typical Data
Values
(2500 RPM)
Refer To
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
Eng:
Misfire
Cylinder #
—
—
DTC P0300
6E2–81
RODEO 6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS
No Malfunction Indicator Lamp (MIL)
D06RX024
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:
f
Inspect the PCM harness and connections for
improper mating, broken locks, improperly formed or
damaged terminals, poor terminal-to-wire
connection, and damaged harness.
f
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.
f
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.
6E2–82
RODEO 6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS
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 in
Powertrain Control Module (PCM) and Sensor.
No Malfunction Indicator Lamp (MIL)
Step
Action
Value(s)
Yes
No
1
Was the “On-Board Diagnostic (OBD) System Check”
performed?
—
Go to
Step 2
Go to
OBD
System
Check
2
Attempt to start the engine.
Does the engine start?
—
Go to
Step 3
Go to
Step 6
3
Check the meter fuse for the instrument cluster ignition
feed circuit.
Is the fuse OK?
—
Go to
Step 4
Go to
Step 16
4
Ignition “ON,” probe the ignition feed circuit at the
cluster connector with a test light to ground.
Is the test light “ON?”
—
Go to
Step 5
Go to
Step 13
5
1. Ignition “OFF.”
2. Disconnect the PCM.
3. Jumper the MIL driver circuit at the PCM connector
to ground.
4. Ignition “ON.”
Is the MIL “ON?”
—
Go to
Step 10
Go to
Step 11
6
Check the PCM ignition feed and battery feed fuses (15
A engine fuse and 15 A PCM fuse).
Are both fuses OK?
—
Go to
Step 7
Go to
Step 15
7
1. Ignition “OFF.”
2. Disconnect the PCM.
3. Ignition “ON.”
4. Probe the ignition feed circuit at the PCM harness
connector with a test light to ground.
Is the test light “ON?”
—
Go to
Step 8
Go to
Step 12
8
Probe the battery feed circuit at the PCM harness
connector with a test light to ground.
Is the test light “ON?”
—
Go to
Step 9
Go to
Step 14
9
Check for a faulty PCM ground connection.
Was a problem found?
—
Verify repair
Go to
Step 10
10
Check for damaged terminals at the PCM.
Was a problem found?
—
Verify repair
Go to
Step 17
11
Check for an open MIL driver circuit between the PCM
and the MIL.
Was a problem found?
—
Verify repair
Go to
Step 18
12
Substitute a known “good” relay for the PCM main
relay.
Was the malfunction fixed?
—
Verify repair
Go to
Step 13
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