Isuzu Rodeo UE. Manual — part 175
6E1–71
RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
MAP – Tech 2 Range 10–105 kPa (0.00–4.97 Volts)
The manifold absolute pressure (MAP) sensor measures
the change in the intake manifold pressure from engine
load, EGR flow, and speed changes. As intake manifold
pressure increases, intake vacuum decreases, resulting
in a higher MAP sensor voltage and kPa reading. The
MAP sensor signal is used to monitor intake manifold
pressure changes during the EGR flow test, to update the
BARO reading, and as an enabling factor for several of
the diagnostics.
MIL – Tech 2 Displays ON or OFF
Indicates the PCM commanded state of the malfunction
indicator lamp (”Check Engine Lamp”).
MISFIRE CUR. CYL. #1/#2/#3/#4 – Tech 2 Range
0–255 Counts
The misfire current counters increase at a rate according
to the number of possible misfires being detected on each
cylinder. The counters may normally display some
activity, but the activity should be nearly equal for all the
cylinders.
MISFIRE CUR. CYL. #1/#2/#3/#4 – Tech 2 Range
0–65535 Counts
The misfire history counters display the relative level of
misfire that has been detected on each cylinder. The
misfire history counters will not update or show any
activity until a misfire DTC (P0300) has become active.
MISFIRE FAILURES SINCE FIRST FAIL – Tech 2
Range 0–65535 Counts
Indicates the number of 200 crankshaft revolution sample
periods during which the level of misfire was sufficiently
high to report a fail.
MISFIRE PASSES SINCE FIRST FAIL – Tech 2
Range 0–65535 Counts
Indicates the number of 200 crankshaft revolution sample
periods during which the level of misfire was sufficiently
low to report a pass.
POWER ENRICHMENT – Tech 2 Displays ACTIVE
or INACTIVE
”ACTIVE” displayed indicates that the PCM has detected
conditions appropriate to operate in power enrichment
mode. The PCM will command power enrichment mode
when a large increase in throttle position and load is
detected. While in the power enrichment mode, the PCM
will increase the amount of fuel delivered by entering
”Open Loop” and increasing the injector pulse width. This
is done to prevent a possible sag or hesitation from
occurring during acceleration.
RICH/LEAN BANK 1 – Tech 2 Displays RICH or
LEAN
Indicates whether oxygen sensor voltage is above a 600
mV threshold voltage (”RICH”) or below a 3000 mV
threshold voltage (”LEAN”). Should change constantly
while in ”Closed Loop”, indicating that the PCM is
controlling the air/fuel mixture properly.
SHORT TERM FT BANK 1
Short term fuel trim to a bank represents a short term
correction to the bank fuel delivery by the PCM in
response to the amount of time the bank fuel control
oxygen sensor voltage spends above or below the 450
mV threshold. If the oxygen sensor voltage has mainly
remained less than 450 mV, indicating a lean air/fuel
mixture, short term fuel trim will increase into the positive
range above 0% and the PCM will pass fuel. If the oxygen
sensor voltage stays mainly above the threshold, short
term fuel trim will decrease below 0% into the negative
range while the PCM reduces fuel delivery to compensate
for the indicated rich condition. Under certain conditions
such as extended idle and high ambient temperatures,
canister purge may cause short term fuel trim to read in
the negative range during normal operation. Fuel trim
values at maximum authority may indicate an excessively
rich or lean system.
SPARK – Tech 2 Range –64
°
to 64
°
Displays the amount of spark advance being commanded
by the PCM on the IC circuit.
START–UP ECT – Tech 2 Range –40
°
C to 151
°
C
(–40
°
F to 304
°
F)
Indicates the engine coolant temperature at the time that
the vehicle was started. Used by the HO2S diagnostic to
determine if the last start–up was a cold start.
START–UP ECT – Tech 2 Range –40
°
C to 151
°
C
(–40
°
F to 304
°
F)
Indicates the intake air temperature at the time that the
vehicle was started. Used by the HO2S diagnostic to
determine if the last start–up was a cold start.
TOTAL MISFIRE CURRENT COUNT – Tech 2 Range
0–255
Indicates the total number of cylinder firing events that
were detected as being misfires during the last 200
crankshaft revolution sample period.
TP ANGLE – Tech 2 Range 0%–100%
TP (throttle position) angle is computed by the PCM from
the TP sensor voltage. TP angle should display ”0%” at
idle and ”100%” at wide open throttle.
TP SENSOR – Tech 2 Range 0.00–5.00 Volts
The voltage being monitored by the PCM on the TP
sensor signal circuit.
UPSHIFT LAMP (MANUAL TRANSMISSION)
VEHICLE SPEED – Tech 2 Range 0–255 km/h
(0–155 mph)
The vehicle speed sensor signal is converted into km/h
and mph for display.
WEAK CYLINDER – Tech 2 Displays Cylinder
Number
This indicates that the PCM has detected crankshaft
speed variations that indicate 2% or more cylinder firing
events are misfires.
6E1–72
RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
TYPICAL SCAN DATA VALUES
Use the Typical Scan Data Values Table only after the
On–Board Diagnostic System Check has been
completed, no DTC(s) were noted, and you have
determined that the on–board diagnostics are functioning
properly. Tech 2 values from a properly–running engine
may be used for comparison with the engine you are
diagnosing. The typical scan data values represent
values that would be seen on a normally–running engine.
NOTE: A Tech 2 that displays faulty data should not be
used, and the problem should be reported to the Tech 2
manufacturer. Use of a faulty Tech 2 can result in
misdiagnosis and unnecessary replacement of parts.
Only the parameters listed below are referred to in this
service manual for use in diagnosis. For further
information on using the Tech 2 to diagnose the PCM and
related sensors, refer to the applicable reference section
listed below. If all values are within the typical range
described below, for diagnosis, refer to the Symptoms
section.
Test Conditions
Engine running, lower radiator hose hot, transmission in
park or neutral, ”Closed Loop”, accessories OFF, brake
not applied and air conditioning OFF.
2.2L L–4 Engine
Tech 2
Parameter
Data List
Units
Displayed
Typical Data
Values (IDLE)
Typical Data
Values
(2500 RPM)
Refer To
Engine Speed
Engine
RPM
Within -50 to
+100 of
“Desired Idle”
Actul engine
speed
General Discription and
Operation
Desired Idle
Speed
Engine
RPM
750
800
General Discription and and
Operation, Idle Air Control
Engine Coolant
Tenpereture
Engine
°
C
80 – 100
(176 – 212
°
F)
80 – 100
(176 – 212
°
F)
General Discription and and
Operation, Engin coolant
tempereture sensor
Start Up ECT
Engine
°
C
–
–
General Discription and and
Operation, Engin coolant
tempereture sensor
Intake Air
Tenpereture
Engine
°
C
0 – 100,
depends on
underhood
0 – 80, depends
on underhood
General Discription and and
Operation, Intake Air
tempereture sensor
Start Up IAT
Engine
°
C
–
–
General Discription and and
Operation, Intake Air
tempereture sensor
Manifold
Absolute
Pressure
Engine
kPa
23 – 40
19 – 32
General Discription and
Operation, Manifold
Absolute Pressure Sensor.
DTC
P0106,P0107,P0108,P1106,
P1107
Manifold
Absolute
Pressure
Engine
V
0.65 – 1.32
0.46 – 1.10
General Discription and
Operation, Manifold
Absolute Pressure Sensor.
DTC
P0106,P0107,P0108,P1106,
P1107
Barometric
Pressure
Engine
kPa
61 – 104
(depends pn
altitude and
barometric)
61 – 104
(depends pn
altitude and
barometric)
General Discription and
Opreration
Throttle Position
Engine
%
0
3 – 5
General Discription and
Opreration, Throttle Position
Sensor. DTC
P0121,P0122,P0123,P1121,
P1122
6E1–73
RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
Tech 2
Parameter
Refer To
Typical Data
Values
(2500 RPM)
Typical Data
Values (IDLE)
Units
Displayed
Data List
Throttle Position
Sensor
Engine
V
0.35 – 0.39
0.55 – 0.59
General Discription and
Opreration, Throttle Position
Sensor. DTC
P0121,P0122,P0123,P1121,
P1122
Calculated Air
Flow
Engine
g/s
2.8 – 3.2
8.5 – 8.7
General Discription and and
Operation, Manifold Air Flow
sensor
Air Fuel Ratio
Engine
Ratio:_to1
14.6:1
14.6:1
General Discription and
Operation, Fuel System
Metering Purpose, Fuel Trim
Spark Advance
Engine
°
CA
10 – 12
27 – 29
General Discription and and
Operation, Electronic
Ignition System
Engine Load
Engine
%
–
–
–
Fuel system
Status
Engine
Closed
Loop
–
–
EVAP System
EGR Duty Cycle
Engine
%
0
0
General Discription and and
Operation, Liner EGR
Operation and Results of
Incorrect Operation
Desired EGR
Position
Engine
%
0
0
General Discription and and
Operation, EGR Pintle
Position Sensor
EGR
Normalized
Engine
%
0
0
–
EGR Feed Back
Engine
V
0.6 – 0.8
0.6 – 0.8
–
EGR Closed
Pintle Position
Engine
Steps
20 – 40
20 – 40
General Discription and and
Operation, EGR Pintle
Position Sensor
Knock Counter
Engine
Yes/No
Yes
Yes
DTC P0325,P0327
Knock Retard
Engine
°
CA
–
–
DTC P0325,P0327
A/C Pressure
Sensor
Engine
mV
0
–
DTC P0532,P0533
A/C Clutch
Relay
Engine
On/Off
Off
–
General Discription and and
Operation, A/C Culutch
Circuit Operation
A/C Request
Engine
Yes/No
No
–
General Discription and and
Operation, A/C Request
Signal
Low Fan
Comanded
Engine
Yes/No
–
–
General Discription and and
Operation, Cooling Fan
Control. DTC P0480,P0481
High Fan
Comanded
Engine
Yes/No
–
–
General Discription and and
Operation, Cooling Fan
Control. DTC P0480,P0481
Camshaft
Activity
Engine
Counts
0 – 255
0 – 255
DTC P0341,P0342
EVAP Vent
Valve
Engine
On/Off
Off
Off
Diagnosis, EVAP Canister
Purge Solenoid And EVAP
Vacuum Switch and Visual
Check. DTC P1441
6E1–74
RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
Tech 2
Parameter
Refer To
Typical Data
Values
(2500 RPM)
Typical Data
Values (IDLE)
Units
Displayed
Data List
EVAP Purge
Solenoid
Engine
%
17 – 19
35 – 37
Diagnosis, EVAP Emission
Canister Purge Valve Check
Low Fuel Lamp
Engine
On/Off
–
–
Engine Fuel. DTC
P0461,P0462,P0463
Fuel Level
Sensor
Engine
V
–
–
Engine Fuel. DTC
P0461,P0462,P0463
Fuel Level
Engine
%
–
–
Engine Fuel. DTC
P0461,P0462,P0463
Fuel Pump
Engine
On/Off
On
On
Engine Fuel System
Fuel Tank
Pressure
Sensor
Engine
V
1.47 – 1.53
1.65 – 1.71
Diagnosis, EVAP Canister
Purge Solenoid And EVAP
System
Deceleration
Fuel Cutoff
Engine
Inactive/Ac
tive
Inactive
Inactive
General Discription and and
Operation
Idle Air Control
Engine
Steps
–
–
General Discription and and
Operation, Intake Air
tempereture sensor
Vehicle Speed
Engine
MPH or
km/h
0
0
Manual Transmission
Ignition Voltage
Engine
V
12.8 – 14.1
12.8 – 14.1
General Discription and and
Operation, Electronic
Ignition System
Malfunction
Indicator Lamp
Engine
On/Off
Off
Off
On–Board Diagnostic
System Check
Up Shift Lamp
Engine
On/Off
Off
Off
Up–Shift Lamp system
Check
Time From Start
Engine
_:_:_
_:_:_
_:_:_
–
Misfire Current
Cyl.#1
Engine
Misfire
Counts
0
0
DTC P0300,P0301
Misfire Current
Cyl.#2
Engine
Misfire
Counts
0
0
DTC P0300,P0302
Misfire Current
Cyl.#3
Engine
Misfire
Counts
0
0
DTC P0300,P0303
Misfire Current
Cyl.#4
Engine
Misfire
Counts
0
0
DTC P0300,P0304
Misfire History
Cyl.#1
Engine
Misfire
Counts
0
0
DTC P0300,P0301
Misfire History
Cyl.#2
Engine
Misfire
Counts
0
0
DTC P0300,P0302
Misfire History
Cyl.#3
Engine
Misfire
Counts
0
0
DTC P0300,P0303
Misfire History
Cyl.#4
Engine
Misfire
Counts
0
0
DTC P0300,P0304
Misfire Failure
Since First Fail
Engine
Misfire
Counts
0
0
DTC P0300
Misfire Presses
Since First Fail
Engine
Misfire
Counts
0
0
DTC P0300
Total Misfire
Engine
Misfire
Counts
0
0
DTC P0300
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