2002 ISUZU AXIOM Service Repair Manual

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Page 1345 of 2100

ISUZU AXIOM 2002 Service Repair Manual 6E±378
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0602 PCM Programming Error
060RY014
Circuit Description
The powertrain control module (PCM) uses Main CPU
and Watchdo

Page 1346 of 2100

ISUZU AXIOM 2002 Service Repair Manual 6E±379
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
DTC P0602 ± PCM Programming Error
StepActionValue(s)Ye sNo
1Was the ªOn-Board Diagnostic (OBD) System Checkº
performed?
ÐGo to Step 2
Go to OBD

Page 1347 of 2100

ISUZU AXIOM 2002 Service Repair Manual 6E±380
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0604 PCM RAM Error
060RY014
Circuit Description
The powertrain control module (PCM) uses Main CPU
RAM and Watchdog CP

Page 1348 of 2100

ISUZU AXIOM 2002 Service Repair Manual 6E±381
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
DTC P0604 ± PCM RAM Error
StepActionValue(s)Ye sNo
1Was the ªOn-Board Diagnostic (OBD) System Checkº
performed?
ÐGo to Step 2
Go to OBD
System

Page 1349 of 2100

ISUZU AXIOM 2002 Service Repair Manual 6E±382
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0606 PCM Internal Performance
060RY014
Circuit Description
The input/output devices in the PCM include
analog-to-digi

Page 1350 of 2100

ISUZU AXIOM 2002 Service Repair Manual 6E±383
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
DTC P0606 ± PCM Internal Performance
StepActionValue(s)Ye sNo
1Was the ªOn-Board Diagnostic (OBD) System Checkº
performed?
ÐGo to Step 2
Go to

Page 1351 of 2100

ISUZU AXIOM 2002 Service Repair Manual 6E±384
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC)
P1106 MAP Sensor Circuit Intermittent High Voltage
060R200051
Circuit Description
The manifold absolute pressure (MAP

6E±384
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC)
P1106 MAP Sensor Circuit Intermittent High Voltage
060R200051
Circuit Description
The manifold absolute pressure (MAP) sensor responds
to changes in intake manifold pressure (vacuum). The
MAP sensor signal voltage to the PCM varies from below
2 volts at idle (high vacuum) to above 4 volts with the
ignition ªONº, engine not running or at wide-open throttle
(low vacuum).
The MAP sensor is used to determine manifold pressure
changes while the liner EGR flow test diagnostic is being
run (refer to
DTC P0401), to determine engine vacuum
level for some other diagnostics and to determine
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 is intermittently above the
calculated value, DTC P1106 will set.
Conditions for Setting the DTC
No TP sensor DTCs are present.
Engine is running for at least 10 seconds.
Throttle angle is below 3% if engine speed is below
1000 RPM.
Throttle angle is below 10% if engine speed is above
1000 RPM.
The MAP sensor indicates an intermittent manifold
absolute pressure above 80 kPa for a total of
approximately 5 seconds over a 16-second period of
time.
Action Taken When the DTC Sets
The PCM will not illuminate the malfunction indicator
lamp (MIL).
The PCM will store conditions which were present
when the DTC was set as Failure Records data only.
This information will not be stored as Freeze Frame
data.
Conditions for Clearing the MIL/DTC
A history DTC P1106 will clear after 40 consecutive
warm-up cycles have occurred without a fault.
DTC P1106 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:
Leaking or plugged vacuum supply line to the MAP
sensor.
Inspect PCM harness connectors for backed-out
terminals, improper mating, broken locks, improperly
formed or damaged terminals, and poor
terminal-to-wire connection.
Inspect the wiring harness for damage. If the harness
appears to be OK, observe the MAP display on the
Tech 2 while moving connectors and wiring harnesses
related to the sensor. A change in the display will
indicate the location of the fault.
Reviewing the Failure Records vehicle mileage since the
diagnostic test last failed may help determine how often

Page 1352 of 2100

ISUZU AXIOM 2002 Service Repair Manual 6E±385
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
the condition that caused the DTC to be set occurs. This
may assist in diagnosing the condition.
The MAP sensor shares a 5 Volt Reference with the

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