2002 ISUZU AXIOM brake sensor

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Page 982 of 2100

ISUZU AXIOM 2002 Service Repair Manual 6E±15
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
PCM Pinout Table, 80-Way Blue Connector ± Row ªF20 ~ 40º
060RY00156
PINPIN FunctionWire ColorIGN ONENG RUNRefer To
F21Bank 1 HO2S 1 GroundWHT0.0V0

Page 1045 of 2100

ISUZU AXIOM 2002 Service Repair Manual 6E±78
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
MISFIRE CUR. CYL. #1 /#2 /#3 /#4 / #5 / #6 Ð Tech 2
Range 0-65535 Counts Ð
The misfire history counters display the relative level of
misfire that

6E±78
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
MISFIRE CUR. CYL. #1 /#2 /#3 /#4 / #5 / #6 Ð Tech 2
Range 0-65535 Counts Ð
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 Ð Tech 2
Range 0-65535 Counts Ð
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 Ð Tech 2
Range 0-65535 Counts Ð
Indicates the number of 200 crankshaft revolution sample
periods during which the level of misfire was sufficiently
low to report a pass.
POWER ENRICHMENT Ð Tech 2 Displays ACTIVE
or INACTIVE Ð
ªACTIVEº 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 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.
SPARK Ð Tech 2 Range ±64 to 64 Ð
Displays the amount of spark advance being commanded
by the PCM on the IC circuit.
START-UP ECT Ð Tech 2 Range ±40C to 151C
(±40F to 304F) Ð
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 IAT Ð Tech 2 Range ±40C to 151C
(±40F to 304F) Ð
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 Ð Tech 2
Range 0-255 Ð
Indicates the total number of cylinder firing events that
were detected as being misfires during the last 200
crankshaft revolution sample period.
TP Ð Tech 2 Range 0%-100% Ð
TP (throttle position) angle is computed by the PCM from
the TP sensor voltage. TP angle should display ª3-5%º
at idle and ª100%º at wide open throttle.
CATALYST PROTECTION MODE Ð Tech 2 Displays
YES or NO Ð
ªYESº displayed indicates that the PCM has detected
conditions appropriate to operate in TWC protection
mode. The PCM will decrease the air/fuel ratio to a value
that depends on mass air flow (higher mass air flow =
lower air/fuel ratio).UPSHIFT LAMP (MANUAL TRANSMISSION)
VEHICLE SPEED Ð Tech 2 Range 0-255 km/h
(0-155 mph) Ð
The vehicle speed sensor signal is converted into km/h
and mph for display.
WEAK CYLINDER Ð Tech 2 Displays Cylinder
Number Ð
This indicates that the PCM has detected crankshaft
speed variations that indicate 2% or more cylinder firing
events are misfires.
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, refer to the
Symptoms section for
diagnosis.
Test Conditions
Engine running, lower radiator hose hot, transmission in
park or neutral, closed loop, accessories off, brake not
applied and air conditioning off.

Page 1046 of 2100

ISUZU AXIOM 2002 Service Repair Manual 6E±79
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
3.5L V-6 Engine (Automatic and Manual Transmission)
Tech 2
Parameter
Data ListUnits DisplayedTypical Data
Values (IDLE)Typical Data
Values
(2500 RPM)

Page 1050 of 2100

ISUZU AXIOM 2002 Service Repair Manual 6E±83
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Tech 2
ParameterRefer To Typical Data
Values
(2500 RPM) Typical Data
Values (IDLE) Units Displayed Data List
Spark
(Advance)EngineDegrees Before
Top

Page 1100 of 2100

ISUZU AXIOM 2002 Service Repair Manual 6E±133
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
DTC P0101 ± MAF System Performance
StepNo Ye s Value(s) Action
71. Connect the MAF Sensor wiring harness connector
to the MAF Sensor.
2.

Page 1107 of 2100

ISUZU AXIOM 2002 Service Repair Manual 6E±140
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0106 MAP System Performance
060R200051
Circuit Description
The manifold absolute pressure (MAP) sensor responds
to c

6E±140
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0106 MAP System Performance
060R200051
Circuit Description
The manifold absolute pressure (MAP) sensor responds
to changes in intake manifold pressure (vacuum). The
MAP sensor signal voltage to the powertrain control
module (PCM) varies from below 2 volts at idle (high
vacuum) to above 4 volts at wide-open throttle (low
vacuum) at sea level.
The MAP sensor is used to determine manifold pressure
changes while the linear exhaust gas recirculation (EGR)
flow test diagnostic is being run (refer to DTC P0401),
engine vacuum level for some other diagnostics, and
barometric pressure (BARO). The PCM compares the
MAP sensor signal to a calculated MAP based on throttle
position and various engine load factors. If the PCM
detects a MAP signal that varies excessively above or
below the calculated value, DTC P0106 will set.
Conditions for Setting the DTC
No TP sensor DTCs are present.
Engine speed is steady, changing less then 100 RPM.
Engine speed is between 1000 rpm and 4000 rpm.
Throttle position is steady, throttle angle changes less
than 1%.
EGR flow rate is steady, changing less than 4%.
No change in brake switch, A/C clutch, TCC or power
steering pressure switch status.
Above conditions are met for longer than 1 second.
Actual MAP value varies more than 10 kPa.The MAP value must vary for a total of 10 seconds over
a 20-second period of time that the samples were
monitored.
The failure must occur for 2 consecutive trips.
Action Taken When the DTC Sets
The PCM will illuminate the malfunction indicator lamp
(MIL) after the second consecutive trip in which the
fault is detected.
The PCM will default to a BARO value of 79.3 kPa.
The PCM will store conditions which were present
when the DTC was set as Freeze Frame and in the
Failure Records data.
Conditions for Clearing the MIL/DTC
The PCM will turn the MIL ªOFFº on the third
consecutive trip cycle during which the diagnostic has
been run and the fault condition is no longer present.
A history DTC P0106 will clear after 40 consecutive
warm-up cycles have occurred without a fault.
DTC P0106 can be cleared by using the Tech 2 ªClear
Infoº function or by disconnecting the PCM battery
feed.
Diagnostic Aids
Check for the following conditions:
Poor connection at PCM ± Inspect harness connectors
for backed-out terminals, improper mating, broken
locks, improperly formed or damaged terminals, and
poor terminal-to-wire connection.

Page 1324 of 2100

ISUZU AXIOM 2002 Service Repair Manual 6E±357
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
ETC passage and on the ETC position, and excessive
deposits in the throttle bore and on the throttle plate.
Large vacuum leak ± Check for a condit

6E±357
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
ETC passage and on the ETC position, and excessive
deposits in the throttle bore and on the throttle plate.
Large vacuum leak ± Check for a condition that causes
a large vacuum leak, such as an incorrectly installed or
faulty PCV valve or brake booster hose disconnected.Reviewing the Failure Records vehicle mileage since the
diagnostic test last failed may help determine how often
the condition that caused the DTC to be set occurs. This
may assist in diagnosing the condition.
DTC P0506 ± Idle Air Control System Low RPM
StepActionValue(s)Ye sNo
1Was the ªOn-Board (OBD) System Checkº performed?
ÐGo to Step 2
Go to OBD
System
Check
2Visually/physically inspect for the following conditions:
Throttle body tampering.
Restricted intake throttle system. Check for a
possible collapsed air intake duct, restricted air
filter element, or foreign objects blocking the air
intake system.
Throttle body: Check for objects blocking the
throttle passage or throttle bore, excessive
deposits in the throttle passage and on the
throttle valve, and excessive deposits in the
throttle bore and on the throttle plate.
Throttle body with lever: Check for objects send
round the throttle spring lever that lever is smooth
movement, and spring lever has not excessive
play
Do any of the above require a repair?
Ð
Refer to
appropriate
section for
on±vehicle
service
Go to Step 3
3Visually/physically inspect for the following conditions:
Acceleration pedal tampering.
Acceleration pedal : Check for objects blocking
the spring or pedal arm.
Acceleration pedal : Check for objects move the
acceleration pedal that pedal is smooth
movement, and acceleration pedal arm has not
excessive play.
Do any of the above require a repair?
Ð
Refer to
appropriatese
ction for
on-vehicle
service
Go to Step 4
41. Check for a poor connection at the throttle body
harness connector.
2. Check for a poor connection at the acceleration
position sensor harness connector.
3. If a problem is found, replace faulty terminals as
necessary.
Was a problem found?
ÐVerify repairGo to Step 7
5Check the following circuits for an open, short to
voltage, short to ground, or poor connection at the
PCM:
Throttle position sensor 1 circuit.
Throttle position sensor 2 circuit.
Throttle DC motor circuit.
Throttle position sensor resistance.
Throttle DC motor resistance.
If a problem is found, repair as necessary.
Was a problem found?
Vcc-GND
1±7k
SIG-DND
change
resistance0.3
± 100
Verify repairGo to Step 6

Page 1341 of 2100

ISUZU AXIOM 2002 Service Repair Manual 6E±374
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0571 No Brake Switch Signal
060R100093
Circuit Description
The brake switch has 3 functions.
Brake pedal operation c

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