sensor ISUZU KB P190 2007 Workshop Repair Manual
[x] Cancel search | Manufacturer: ISUZU, Model Year: 2007, Model line: KB P190, Model: ISUZU KB P190 2007Pages: 6020, PDF Size: 70.23 MB
Page 1088 of 6020
6E-54 Engine Control System (4JH1)
DTC
(Symptom Code) Flash
Code MIL
Status DTC Name on
scan tool Condition for
Running the DTC Condition for
Setting the DTC Possible Cause
P0243
(8) 64 ON Turbocharger
W aste gate
Solenoid Boost
Solenoid Circuit
High Voltage •
The ignition switch
is ON. •
The ECM detects
that the high
voltage condition on
the turbocharger
solenoid valve
control circuit for
longer than 3
seconds when the
solenoid valve is
commanded ON.
•
Turbocharger solenoid valve
control circuit is short to battery
or ignition voltage circuit.
• Faulty turbocharger solenoid
valve.
• Faulty ECM.
P0251 (6) 53 ON Injection Pump
Fuel Metering
Control •
The fuel injection
pump CMP sensor
signal is generated.
• The CAN
communication
between the ECM
and PCU is normal.
•
The PCU detects
that the fuel
injection solenoid
valve is operated
when the desired
fuel injection
quantity is
commanded 0
mg/strk.
•
Faulty fuel injection pump.
• Faulty PCU.
P0251 (7) 53 ON Injection Pump
Fuel Metering
Control •
The fuel injection
pump CMP sensor
signal is generated.
• The CKP sensor
signal is generated.
• The engine speed
is higher than 500
RPM.
•
The PCU detects
that the doubled
fuel injection pump
speed is lower than
engine speed by
690 RPM for longer
than 0.2 seconds.
•
Faulty CKP sensor signal.
• Faulty fuel injection pump CMP
sensor signal.
• Electrical interference.
• Magnetic interference.
• Faulty PCU.
P0251 (9) 53 ON Injection Pump
Fuel Metering
Control •
The ignition switch
is ON. •
The PCU detects
internal fuel
injection pump
control maps are
not programmed
during self-test.
•
Faulty PCU.
P0251 (A) 53 ON Injection Pump
Fuel Metering
Control •
The ignition switch
is ON. •
The PCU detects
internal EEPROM
or A/D converter is
failed during self-
test.
•
Faulty PCU.
P0251 (B) 53 ON Injection Pump
Fuel Metering
Control •
The ignition switch
is ON. •
The PCU detects
that the fuel
injection solenoid
valve drive circuit is
failed during self-
test.
•
Faulty fuel injection pump.
• Faulty PCU.
P0251 (D) 53 ON Injection Pump
Fuel Metering
Control •
The ignition switch
is ON. •
The PCU detects
that the fuel
injection solenoid
valve drive circuit
voltage level is
abnormal during
self-test.
•
Faulty fuel injection pump.
• Faulty PCU.
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ISUZU KB P190 2007
Page 1089 of 6020
Engine Control System (4JH1) 6E-55
DTC
(Symptom Code) Flash
Code MIL
Status DTC Name on
scan tool Condition for
Running the DTC Condition for
Setting the DTC Possible Cause
P0251
(E) 53 ON Injection Pump
Fuel Metering
Control •
The ignition switch
is ON. •
The ECM detects
communication
message from the
PCU is not received
for longer than 1
second.
•
CAN high circuit is open circuit,
high resistance, short to ground,
short to battery or ignition
voltage.
• CAN low circuit is open circuit,
high resistance, short to ground,
short to battery or ignition
voltage.
• Electrical interference.
• Magnetic interference.
• Faulty PCU.
• Faulty ECM.
P0335 (B) 43 ON
Crankshaft
Position (CKP)
Sensor Circuit •
The ignition switch
is ON.
• The engine speed
is higher than 665
RPM.
•
The ECM detects
extra or missing
CKP sensor signals
while engine is
running. •
Sensor signal circuit is open
circuit, high resistance, short to
ground, short to battery or short
to ignition voltage.
• Sensor low reference circuit is
open circuit, high resistance,
short to ground, short to battery
or short to ignition voltage.
• Sensor shield ground is open
circuit, high resistance, short to
ground, short to battery or short
to ignition voltage.
• Faulty CKP sensor.
• Faulty ECM.
• Electrical interference.
• Magnetic interference.
• Faulty sensor installation.
• Faulty flywheel circumference.
P0335 (D) 43 ON
Crankshaft
Position (CKP)
Sensor Circuit •
DTC P0335
(Symptom Code B)
is not set.
• The ignition switch
is ON.
• The fuel injection
pump CMP sensor
signal is generated.
• The CAN
communication
between the ECM
and PCU is normal.
•
The ECM detects
that the CKP sensor
signals are not
generated when
doubled fuel
injection pump
rotation speed is
higher than 50
RPM.
•
Sensor signal circuit is open
circuit, high resistance, short to
ground, short to battery or short
to ignition voltage.
• Sensor low reference circuit is
open circuit, high resistance,
short to ground, short to battery
or short to ignition voltage.
• Sensor shield ground is open
circuit, high resistance, short to
ground, short to battery or short
to ignition voltage.
• Faulty CKP sensor.
• Faulty ECM.
• Electrical interference.
• Magnetic interference.
• Faulty sensor installation.
• Faulty flywheel circumference.
P0335 (E) 43 ON Crankshaft
Position (CKP)
Sensor Circuit •
Ignition switch is
ON.
•
The ECM detects
that the engine
speed is higher
than 5700 RPM for
0.2 seconds. •
Engine overrun.
• Faulty CKP sensor.
• Faulty ECM.
• Electrical interference.
• Magnetic interference.
• Faulty flywheel circumference.
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ISUZU KB P190 2007
Page 1090 of 6020
6E-56 Engine Control System (4JH1)
DTC
(Symptom Code) Flash
Code MIL
Status DTC Name on
scan tool Condition for
Running the DTC Condition for
Setting the DTC Possible Cause
P0380
(4) 66 ON Glow Plug Relay
Control Circuit Low
Voltage •
The ignition switch
is ON. •
The ECM detects
that the low voltage
condition on the
glow relay control
circuit for longer
than 3 seconds
when the relay is
commanded OFF.
•
ECM (10A) fuse (EB1) open.
• Glow relay ignition voltage feed
circuit on coil side is open circuit
or high resistance.
• Glow relay control circuit is open
circuit, high resistance or short
to ground.
• Glow relay is poor installation.
• Faulty glow relay.
• Faulty ECM.
P0380 (8) 66 ON
Glow Plug Relay
Control Circuit
High Voltage •
The ignition switch
is ON. •
The ECM detect
that the high
voltage condition on
the glow relay
control circuit for
longer than 1
second when the
relay is commanded
ON.
•
Glow relay control circuit is short
to battery or ignition voltage
circuit.
• Faulty glow relay.
• Faulty ECM.
P0381 (4) 67 ON Glow Plug
Indicator Circuit
Low Voltage •
The ignition switch
is ON.
•
The ECM detects
that the low voltage
condition on the
glow indicator lamp
control circuit for
longer than 3
seconds when the
indicator lamp is
commanded OFF.
•
Meter (15A) fuse (C-14) open.
• Glow indicator lamp ignition
voltage feed circuit is open
circuit or high resistance.
• Glow indicator lamp control
circuit is open circuit, high
resistance or short to ground.
• Poor harness connector
connection.
• Glow indicator lamp bulb burned
out.
• Faulty instrument panel cluster
(meter assembly).
• Faulty ECM.
P0381 (8) 67 ON Glow Plug
Indicator Circuit
High Voltage •
The ignition switch
is ON. •
The ECM detects
that the high
voltage condition on
the glow indicator
lamp control circuit
for longer than 1
second when the
indicator lamp is
commanded ON.
•
Glow indicator lamp control
circuit is short to battery or
ignition voltage circuit.
• Faulty instrument panel cluster
(meter assembly).
• Faulty ECM.
P0400 (3) 32 ON Exhaust Gas
Recirculation
(EGR) System
Performance •
The ignition switch
is ON.
• The engine is
running.
• The BARO is
between 850 hPa
and 1100 hPa.
• The IAT is between
15°C (59°F) and
100°C (212°F).
• The ECT is
between 35°C
(95°F) and 100°C
(211°F).
•
The ECM detects
that the MAF
amount is 150
mg/strk lower than
the desired MAF for
60 seconds.
•
MAF sensor circuits are high
resistance.
• MAF sensor signal circuit is short
to IAT sensor signal circuit.
• Intake air leakage.
• Intake duct disconnected.
• Intake system is obstructed.
• Faulty turbocharger.
• Faulty exhaust system.
• Faulty EGR valve vacuum
control system.
• Faulty EGR valve.
• Faulty EGR solenoid valve.
• Faulty EGR solenoid valve
vacuum hose routing.
• Faulty MAF sensor.
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ISUZU KB P190 2007
Page 1091 of 6020
Engine Control System (4JH1) 6E-57
DTC
(Symptom Code) Flash
Code MIL
Status DTC Name on
scan tool Condition for
Running the DTC Condition for
Setting the DTC Possible Cause
P0400
(4) 32 ON Exhaust Gas
Recirculation
(EGR) Solenoid
Circuit Low
Voltage •
The ignition switch
is ON.
•
The ECM detects
that the low voltage
condition on the
EGR solenoid valve
control circuit for
longer than 3
seconds when the
solenoid valve is
commanded OFF.
•
ECM (10A) fuse (EB1) open.
• EGR solenoid valve ignition
voltage feed circuit is open
circuit or high resistance.
• EGR solenoid valve control
circuit is open circuit, high
resistance or short to ground.
• Poor harness connector
connection.
• Faulty EGR solenoid valve.
• Faulty ECM.
P0400 (5) 32 ON Exhaust Gas
Recirculation
(EGR) System
Performance •
The ignition switch
is ON.
• The engine is
running.
• The BARO is
between 850 hPa
and 1100 hPa.
• The IAT is between
15°C (59°F) and
100°C (212°F).
• The ECT is
between 35°C
(95°F) and 100°C
(211°F).
•
The ECM detects
that the MAF
amount is 150
mg/strk higher than
the desired MAF for
60 seconds.
•
MAF sensor low reference circuit
is high resistance.
• Faulty EGR valve vacuum
control system.
• Faulty EGR valve.
• Faulty vacuum pump
• Faulty EGR solenoid valve.
• Faulty EGR solenoid valve
vacuum hose routing.
• Faulty MAF sensor.
• Faulty ECM.
P0400 (8) 32 ON Exhaust Gas
Recirculation
(EGR) Solenoid
Circuit High
Voltage
•
The ignition switch
is ON.
•
The ECM detects
that the high
voltage condition on
the EGR solenoid
valve control circuit
for longer than 3
seconds when the
solenoid valve is
commanded ON.
•
EGR solenoid valve control
circuit is short to battery or
ignition voltage circuit.
• Faulty EGR solenoid valve.
• Faulty ECM.
P0500 (1) 24 ON Vehicle Speed
Sensor (VSS)
Circuit
•
The ignition switch
is ON. •
The ECM detects
that the vehicle
speed is higher
than 200 km/h (125
MPH) for 5
seconds.
•
Vehicle speed too high.
• Electrical interference.
• Magnetic interference.
• Faulty A/T VSS. (2W D with A/T)
• Faulty VSS. (Except 2W D with
A/T)
• Faulty ECM.
P0500 (A) 24 ON Vehicle Speed
Sensor (VSS)
Circuit
•
The ignition switch
is ON. •
The ECM detects
that the vehicle
speed sensor signal
frequency is too
high for 0.6
seconds. •
Electrical interference.
• Magnetic interference.
• Faulty A/T VSS. (2W D with A/T)
• Faulty VSS. (Except 2W D with
A/T)
• Faulty ECM.
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ISUZU KB P190 2007
Page 1092 of 6020
6E-58 Engine Control System (4JH1)
DTC
(Symptom Code) Flash
Code MIL
Status DTC Name on
scan tool Condition for
Running the DTC Condition for
Setting the DTC Possible Cause
P0500
(B) 24 ON Vehicle Speed
Sensor (VSS)
Circuit
•
The ignition switch
is ON.
• The engine speed
is higher than 3600
RPM.
• The fuel injection
quantity is more
than 41 mg/strk.
•
The ECM detects
that the vehicle
speed is lower than
1.5km/h (1 MPH) for
60 seconds.
•
2W D with A/T
• VSS signal circuit is open circuit,
high resistance, short to ground,
short to battery or ignition.
• Poor harness connector
connection.
• Faulty instrument panel cluster
(meter assembly).
• Faulty TCM.
• Faulty ECM.
• Except 2W D with A/T
• Meter (15A) fuse (C-14) open.
• Sensor ignition voltage circuit is
open circuit or high resistance.
• Sensor signal circuit is open
circuit, high resistance, short to
ground, short to battery or
ignition voltage.
• Sensor low reference circuit is
open circuit or high resistance.
• Poor harness connector
connection.
• Faulty instrument panel cluster
(meter assembly).
• Faulty VSS.
• Faulty ECM.
P0560 (1) 35 OFF System Voltage
•
The ECM detects
that the battery
voltage feed circuit
voltage is more
than 20 volts.
•
Incorrect “Jump Starting”.
• Faulty charging system.
• Faulty ECM.
P0560 (2) 35 OFF System Voltage
•
The ECM detects
that the battery
voltage feed circuit
voltage is less than
7 volts.
•
Faulty charging system.
• Battery voltage feed circuit is
high resistance.
• Faulty ECM.
P0560 (A) 35 OFF System Voltage
•
The PCU battery
voltage feed circuit
voltage is less than
4.5 volts or more
than 27 volts.
•
Incorrect “Jump Starting”.
• Faulty charging system.
• Battery voltage feed or ground
circuit is high resistance.
• Faulty PCU.
P0561 (A) 18 OFF Ignition Switch
Circuit
•
The ECM detects
that the ignition
voltage circuit is
changed ON to OFF
during initialization.
•
ECM main relay control circuit is
short to ground.
• Ignition voltage feed circuit is
intermittently open circuit or high
resistance.
• Faulty ignition switch.
P0561 (B) 18 OFF Ignition Switch
Circuit
•
The ECM detects
internal ignition
voltage feed circuit
is failed after
initialization.
•
Faulty ECM.
P0602 - ON Control Module
Not Programmed
•
VIN in the ECM is
not programmed. •
VIN is not programmed.
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ISUZU KB P190 2007
Page 1094 of 6020
6E-60 Engine Control System (4JH1)
DTC
(Symptom Code) Flash
Code MIL
Status DTC Name on
scan tool Condition for
Running the DTC Condition for
Setting the DTC Possible Cause
P0703
(B) 25 ON Brake Switch
Circuit •
The ignition switch
is ON.
• The engine speed
is higher than 665
RPM.
• The vehicle speed
is higher than 0
km/h (0 MPH).
•
The ECM detects
that the brake pedal
1 switch is OFF
(Released) when
the brake pedal 2
switch is ON
(Applied) for longer
than 30 seconds. •
Stop (15A) fuse (C-15) open.
• ECM (10A) fuse (EB-4) open.
• Brake pedal 1 switch battery
voltage feed circuit is open
circuit or high resistance.
• Brake pedal 1 switch signal
circuit is open circuit, high
resistance, short to battery or
ignition voltage.
• Brake pedal 2 switch ignition
voltage feed circuit is open
circuit or high resistance.
• Brake pedal 2 switch signal
circuit is open circuit, high
resistance, short to battery or
ignition voltage.
• Misadjusted brake pedal switch.
• Brake pedal switch is poor
connection.
• Faulty brake pedal switch.
• Faulty ECM.
P0704 (6) 57 ON Clutch Switch
Input Circuit •
The ignition switch
is ON.
•
The ECM detects
that the clutch pedal
switch signal does
not change during
the vehicle speed
changes between
1.5 km/h (1 MPH)
and 80 km/h (50
MPH).
•
ECM (10A) fuse (EB-4) open.
• Clutch pedal switch ignition
voltage feed circuit is open
circuit or high resistance.
• Clutch pedal switch signal circuit
is open circuit, high resistance,
short to battery or ignition
voltage.
• Misadjusted clutch pedal switch.
• Clutch pedal switch is poor
connection.
• Faulty clutch pedal switch.
• Faulty ECM.
P1105 (1) 86 ON Barometric
Pressure (BARO)
Sensor Circuit
High Voltage
•
The ignition switch
is ON.
•
The ECM detects
that the BARO
sensor signal
voltage is more
than 4.4 volts for 1
second.
•
Faulty ECM.
P1105
(2) 86 ON Barometric
Pressure (BARO)
Sensor Circuit Low
Voltage
•
The ignition switch
is ON.
•
The ECM detects
that the BARO
sensor signal
voltage is less than
1.5 volts for 1
second.
•
Faulty ECM.
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ISUZU KB P190 2007
Page 1095 of 6020
Engine Control System (4JH1) 6E-61
DTC
(Symptom Code) Flash
Code MIL
Status DTC Name on
scan tool Condition for
Running the DTC Condition for
Setting the DTC Possible Cause
P1120
(1) 21 ON Accelerator Pedal
Position (APP)
Sensor Circuit
High Voltage •
The ignition switch
is ON.
•
The ECM detects
that the APP sensor
signal voltage is
more than 4.5 volts
for 0.5 seconds. •
Sensor 5V reference circuit is
short to battery or ignition
voltage.
• Sensor 5V reference circuit is
short to ground or short to the
low reference circuit.
• Sensor signal circuit is short to
any 5V reference circuit, short to
battery or ignition voltage circuit.
• Sensor low reference circuit is
open circuit or high resistance.
• Poor harness connector
connection.
• Faulty APP sensor.
• Faulty ECM.
P1120 (7) 21 ON Accelerator Pedal
Position (APP)
Sensor Circuit 5V
Reference High
Voltage
•
The ignition switch
is ON.
•
The ECM detects
that the APP sensor
voltage supply
circuit is more than
5.2 volts for 0.5
seconds.
•
Sensor 5V reference circuit is
short to battery or ignition
voltage circuit.
• Faulty ECM.
P1120 (9) 21 ON Accelerator Pedal
Position (APP)
Sensor Circuit 5V
Reference Low
Voltage
•
The ignition switch
is ON.
•
The ECM detects
that the APP sensor
voltage supply
circuit is less than
4.6 volts for 0.5
seconds.
•
Sensor 5V reference circuit is
short to ground or short to the
low reference circuit.
• Faulty APP sensor.
• Faulty ECM.
P1120 (D) 21 ON
Accelerator Pedal
Position (APP)
Sensor Circuit
Correlation •
The ignition switch
is ON.
• The engine speed
is higher than 1700
RPM.
• The vehicle speed
is higher than 1.5
km/h (1 MPH).
•
The ECM detects
APP sensor angle
is stationary more
than 8.7%, then
brake pedal is
depressed for
longer than 2
seconds.
•
Brake pedal 1 switch signal
circuit is open circuit, high
resistance, short to battery or
ignition voltage.
• Accelerator pedal stuck.
• Intake throttle valve stuck.
• Intake throttle valve control cable
damaged, stuck or no free play.
• Misadjusted APP sensor.
• Faulty APP sensor.
• Misadjusted brake pedal switch.
• Faulty brake pedal switch.
• Faulty ECM.
P1120 (E) 21 ON Accelerator Pedal
Position (APP)
Sensor Circuit
Correlation •
The ignition switch
is ON. Either of following
condition is met.
• The ECM detects
APP sensor angle
is less than 0.35%,
then idle switch is
OFF for longer than
0.6 seconds.
OR
• The ECM detects
APP sensor angle
is more than 8.7%,
then idle switch is
ON for longer than
0.6 seconds.
•
APP sensor 5V reference circuit
is open circuit or high resistance.
•
APP sensor signal circuit is open
circuit, high resistance, short to
ground or short to the low
reference circuit.
• APP sensor low reference circuit
is high resistance.
• Idle switch signal circuit is open
circuit, high resistance, short to
ground, short to battery or
ignition voltage.
• Poor harness connector
connection.
• Faulty APP sensor.
• Faulty idle switch.
• Faulty ECM.
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ISUZU KB P190 2007
Page 1096 of 6020
6E-62 Engine Control System (4JH1)
DTC
(Symptom Code) Flash
Code MIL
Status DTC Name on
scan tool Condition for
Running the DTC Condition for
Setting the DTC Possible Cause
P1173
(3) 22 OFF Limitation of
Injection Quantity •
The ignition switch
is ON. •
The ECM detects
an excessive high
coolant temperature
for longer than 30
seconds.
•
Engine overheat.
• Faulty engine cooling system.
• Faulty ECT sensor.
P1173 (7) 22 OFF Limitation of
Injection Quantity
•
The ignition switch
is ON. •
The ECM detects
an excessive high
FT for longer than
30 seconds.
•
Faulty PCU.
P1173 (A) 22 OFF Limitation of
Injection Quantity
•
The ignition switch
is ON. •
The ECM detects
an excessive low
FT for longer than
30 seconds.
•
Faulty PCU.
P1335 (A) 43 ON Crankshaft
Position (CKP)
Sensor Circuit •
The ignition switch
is ON. •
The PCU detects
CKP sensor signal
from the ECM is
faulty.
•
CKP sensor signal output circuit
is open circuit, high resistance,
short to ground, short to battery
or ignition voltage.
• Poor harness connector
connection.
• Faulty PCU.
• Faulty ECM.
P1345 (A) 41 ON Crankshaft
Position (CKP) –
Camshaft Position
(CMP) Correlation
•
The PCU received
faulty fuel injection
pump CMP sensor
signal for 1 second.
•
Faulty fuel injection pump.
• Faulty PCU.
P1520 (A) 47 ON Park/Neutral
Position Switch
Circuit •
The ignition switch
is ON.
• The engine speed
is higher than 1500
RPM.
• The vehicle speed
is higher than 63
km/h (39 MPH)
(M/T) or 78 km/h
(49 MPH) (A/T).
• The clutch pedal is
released. (M/T)
•
The ECM detects
that the neutral
switch signal is
continuously ON
(neutral or P/N
range) during three
consecutive driving
cycles.
•
Manual Transmission
• Neutral switch signal circuit is
short to battery or ignition
voltage.
• Faulty neutral switch.
• Faulty ECM.
• Automatic Transmission
• P & N position switch signal
circuit is short to battery or
ignition voltage.
• Misadjusted inhibitor switch.
• Faulty inhibitor switch.
• Faulty ECM.
P1520 (B) 47 ON Park/Neutral
Position Switch
Circuit •
The ignition switch
is ON.
• The engine speed
is higher than 665
RPM
• The vehicle speed
is lower than 2 km/h
(1.2 MPH).
• The clutch pedal is
released after once
depressed.
•
The ECM detects
that the neutral
switch signal is
continuously OFF
(other than neutral)
during three
consecutive driving
cycles.
•
ECM (10A) fuse (EB-4) open.
• Neutral switch ignition voltage
feed circuit is open circuit or high
resistance.
• Neutral switch signal circuit is
open circuit or high resistance.
• Poor harness connector
connection.
• Faulty neutral switch.
• Faulty ECM.
P1605 (C) 55 ON Control Module
Internal
Performance •
The ECM detects
internal seed or key
file in EEPROM
data is destroyed.
•
Faulty ECM.
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ISUZU KB P190 2007
Page 1100 of 6020
6E-66 Engine Control System (4JH1)
DTC P0100 (Symptom Code 7) (Flash Code 65)
Circuit Description
The mass air flow (MAF) sensor is an air flow meter that
measures the amount of air that enters the engine. It is
fitted between the air cleaner and turbocharger. A small
quantity of air that enters the engine indicates
deceleration or idle speed. A large quantity of air that
enters the engine indicates acceleration or a high load
condition. The MAF sensor has the following circuits.
• Ignition voltage circuit
• 5 volts reference circuit
• Low reference circuit
• MAF sensor signal circuit
The engine control module (ECM) provides 5 volts
reference voltage through the reference circuit to the
MAF sensor. The ECM monitors the voltage on the 5
volts reference circuit. If the ECM detects an
excessively high MAF sensor 5 volts reference voltage,
this DTC will set.
Condition for Running the DTC
• The ignition switch is ON.
Condition for Setting the DTC
• The ECM detects that the MAF sensor 5 volts
reference circuit voltage is more than 5.2 volts fo
r
0.5 seconds.
Action Taken When the DTC Sets
• The ECM illuminates the malfunction indicato
r
lamp (MIL) when the diagnostic runs and fails.
• The ECM uses a MAF substitution of 1600 mg/strk
for engine control.
• The ECM uses an EGR solenoid valve control
substitution of 10%.
Condition for Clearing the MIL/DTC
• The ECM turns OFF the MIL when the diagnostic
runs and does not fail.
• A history DTC clears after 40 consecutive driving
cycles without a fault. Or clear with the scan tool.
Diagnostic Aids
• If an intermittent condition is suspected, refer to
Intermittent Conditions in this section.
Notice: • The MAF Sensor parameter on the scan tool will
only update with engine running.
Test Description
The number below refers to the step number on the
diagnostic table.
3. If the MAF sensor 5 volts reference circuit between
the ECM and the sensor is normal, the sensor signal
voltage low DTC P0100 (Symptom Code B) will set.
DTC P0100 (Symptom Code 7) (Flash Code 65)
Schematic Reference: Engine Controls Schematics
Connector End View Reference: Engine Controls
Connector End Views or Engine Control Module (ECM)
Connector End Views
Step Action Value(s) Yes No
1 Did you perform the Diagnostic System Check-
Engine Controls?
Go to Step 2 Go to Diagnostic
System Check-
Engine Controls
2 1. Install the scan tool. 2. Turn OFF the ignition for 30 seconds.
3. Start the engine.
4. Monitor the Diagnostic Trouble Code (DTC) Information with the scan tool.
Does the DTC fail this ignition?
Go to Step 3 Go to Diagnostic
Aids
3 1. Turn OFF the ignition. 2. Disconnect the mass air flow (MAF) sensor harness connector.
3. Start the engine and let idle for 30 seconds.
4. Monitor the DTC Information with the scan tool.
Does DTC P0100 (Symptom Code B) set, but not
DTC P0100 (Symptom Code 7)?
Go to Step 5 Go to Step 4
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ISUZU KB P190 2007
Page 1101 of 6020
Engine Control System (4JH1) 6E-67
Step Action Value(s) Yes No
4 1. Test the 5 volts reference circuit between the
engine control module (ECM) (pin 83 of C-57
connector) and the MAF sensor (pin 4 of C-116
connector) for the following conditions: • A short to battery or ignition voltage
• A short to the sensor ignition voltage
2. Repair the circuit(s) as necessary.
Did you find and correct the condition?
Go to Step 7 Go to Step 6
5 Replace the MAF sensor. Refer to Mass Air Flow Sensor Replacement in this section.
Did you complete the replacement?
Go to Step 7
6 Important: Replacement ECM must be
programmed.
Replace the ECM. Refer to Engine Control Module
(ECM) Replacement in this section.
Did you complete the replacement?
Go to Step 7
7 1. Reconnect all previously disconnected harness
connector(s).
2. Clear the DTCs with the scan tool.
3. Turn OFF the ignition for 30 seconds.
4. Start the engine.
5. Monitor the DTC Information with the scan tool.
Did the DTC fail this ignition?
Go to Step 3 Go to Step 8
8 Observe the DTC Information with the scan tool. Are there any DTCs that you have not diagnosed? Go to Diagnostic
Trouble Code (DTC) List System OK
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TO MODEL INDEX
ISUZU KB P190 2007