Isuzu KB P190. Manual — part 271

6E-50 Engine Control System (4JH1)

Diagnostic Trouble Code (DTC) List

DTC

(Symptom

Code)

Flash

Code

MIL

Status

DTC Name on

scan tool

Condition for

Running the DTC

Condition for

Setting the DTC

Possible Cause

P0100

(7)

65

ON

Mass Air Flow
(MAF) Sensor
Circuit 5V
Reference High
Voltage

• The ignition switch

is ON.

• The ECM detects

that the MAF sensor
5 volts reference
circuit voltage is
more than 5.2 volts
for 0.5 seconds.

• Sensor 5V reference circuit is

short to battery or ignition
voltage.

• Sensor 5V reference circuit is

short to the sensor ignition
voltage circuit.

• Faulty MAF sensor.

• Faulty ECM.

P0100

(9)

65

ON

Mass Air Flow
(MAF) Sensor
Voltage 5V
Reference Circuit
Low Voltage

• The ignition switch

is ON.

• The ECM detects

that the MAF sensor
5 volts reference
circuit voltage is
less than 4.6 volts
for 0.5 seconds.

• Sensor 5V reference circuit is

short to ground.

• Sensor 5V reference circuit is

short to the low reference circuit.

• Faulty MAF sensor.

• Faulty ECM.

P0100

(B)

65

ON

Mass Air Flow
(MAF) Sensor
Circuit Low
Voltage

• The ignition switch

is ON.

• The engine is

running.

• The ECM calculated

MAF is lower than -
18.6 kg/h for 5
seconds.

• ECM (10A) fuse (EB1) open.

• Sensor ignition voltage feed

circuit is open circuit or high
resistance.

• Sensor 5V reference circuit is

open circuit, high resistance,
short to ground or short to the
low reference circuit.

• Sensor signal circuit is open

circuit, high resistance, short to
ground or short to the low
reference circuit.

• Poor harness connector

connection.

• Faulty MAF sensor installation.

• Faulty MAF sensor.

• Faulty ECM.

P0100

(C)

65

ON

Mass Air Flow
(MAF) Sensor
Circuit High
Voltage

• The ignition switch

is ON.

• The engine is

running.

• The ECM calculated

MAF is higher than
984 kg/h for 10
seconds.

• 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 MAF sensor.

• Faulty ECM.

P0105

(1)

34 ON

Vacuum

Pressure

Sensor Circuit
High Voltage

• The ignition switch

is ON.

• The ECM detects

that the vacuum
pressure sensor
signal voltage is
more than 4.4 volts
for 3 seconds.

• Sensor 5V reference circuit is

short to battery or ignition
voltage.

• Sensor signal circuit is short to

any 5V reference circuit, short to
battery or ignition voltage.

• Sensor low reference circuit is

open circuit or high resistance.

• Poor harness connector

connection.

• Faulty vacuum pressure sensor.

• Faulty ECM.

Engine Control System (4JH1) 6E-51

DTC

(Symptom

Code)

Flash

Code

MIL

Status

DTC Name on

scan tool

Condition for

Running the DTC

Condition for

Setting the DTC

Possible Cause

P0105

(2)

34 ON

Vacuum

Pressure

Sensor Circuit Low
Voltage

• The ignition switch

is ON.

• The ECM detects

that the vacuum
pressure sensor
signal voltage is
less than 0.5 volts
for 3 seconds.

• Sensor 5V reference circuit is

open circuit or high resistance,
short to ground or short to the
low reference circuit.

• Sensor signal circuit is open

circuit, high resistance, short to
ground or short to the low
reference circuit.

• Poor harness connector

connection.

• Faulty vacuum pressure sensor.

• Faulty ECM.

P0105

(7)

34 ON

Vacuum

Pressure

Sensor Voltage 5V
Reference Circuit
High Voltage

• The ignition switch

is ON.

• The ECM detects

that the vacuum
pressure sensor 5
volts reference
circuit voltage is
more than 5.2 volts
for 2.5 seconds.

• Sensor 5V reference circuit is

short to battery or ignition
voltage.

• Faulty ECM.

P0105

(9)

34 ON

Vacuum

Pressure

Sensor Voltage 5V
Reference Circuit
Low Voltage

• The ignition switch

is ON.

• The ECM detects

that the vacuum
pressure sensor 5
volts reference
circuit voltage is
less than 4.5 volts
for 2.5 seconds.

• Sensor 5V reference circuit is

short to ground or short to low
reference circuit.

• Faulty vacuum pressure sensor.

• Faulty ECM.

P0110

(1)

23 ON

Intake

Air

Temperature (IAT)
Sensor Circuit
High Voltage

• The ignition switch

is ON.

• The ECM detects

that the IAT sensor
signal voltage is
more than 4.7 volts
for 3 seconds.

• Sensor signal circuit is open

circuit, high resistance, short to
any 5V reference circuit, short to
battery or ignition voltage.

• Sensor low reference circuit is

open circuit or high resistance.

• Poor harness connector

connection.

• Faulty IAT sensor.

• Faulty ECM.

P0110

(2)

23 ON

Intake

Air

Temperature (IAT)
Sensor Circuit Low
Voltage

• The ignition switch

is ON.

• The ECM detects

that the IAT sensor
signal voltage is
less than 0.3volts
for 3 seconds.

• Sensor signal circuit is short to

ground or short to the low
reference circuit.

• Faulty IAT sensor.

• Faulty ECM.

P0115

(1)

14 ON

Engine

Coolant

Temperature
(ECT) Sensor
Circuit High
Voltage

• The ignition switch

is ON.

• The ECM detects

that the ECT sensor
signal voltage is
more than 4.7 volts
for 3 seconds.

• Sensor signal circuit is open

circuit, high resistance, short to
any 5V reference circuit, short to
battery or ignition voltage.

• Sensor low reference circuit is

open circuit or high resistance.

• Poor harness connector

connection.

• Faulty ECT sensor.

• Faulty ECM.

P0115

(2)

14 ON

Engine

Coolant

Temperature
(ECT) Sensor
Circuit Low
Voltage

• The ignition switch

is ON.

• The ECM detects

that the ECT sensor
signal voltage is
less than 0.3volts
for 3 seconds.

• Sensor signal circuit is short to

ground or short to the low
reference circuit.

• Faulty ECT sensor.

• Faulty ECM.

6E-52 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

P0180

(B)

15 ON

Fuel

Temperature

Sensor Circuit

• Ignition switch is

ON.

• The PCU internal

FT sensor output is
lower than -40°C (-
40°F) for 3 seconds
or higher than
150°C (302°F) for 3
seconds.

• Faulty PCU.

P0215

(A)

52 ON

at

next

ignition

cycle

Engine Shutoff
(ESO) Solenoid
Control Circuit

• The ignition switch

is OFF.

• The engine speed

is lower than 1500
RPM.

• The vehicle speed

is lower than 1.5
km/h (1 MPH).

• After the condition

for running the DTC
for 2 seconds, the
engine speed is
higher than 200
RPM when the ESO
solenoid valve is
commanded shutoff
from the PCU.

• Faulty fuel injection pump.

P0215

(B)

52 ON

Engine

Shutoff

(ESO) Solenoid
Control Circuit

• The ignition switch

is ON.

• The PCU detects

high voltage
condition on the
ESO solenoid valve
control circuit for
longer than 1
second when the
ECM does not
command shutoff.

• ESO solenoid valve control

circuit is short to battery or
ignition voltage.

• Faulty PCU.

• Faulty ECM.

P0215

(C)

52 ON

Engine

Shutoff

(ESO) Solenoid
Control Circuit

• The ignition switch

is OFF.

• The engine speed

is lower than 1500
RPM.

• The vehicle speed

is lower than 1.5
km/h (1 MPH).

• The engine speed

is higher than 200
RPM within 2
seconds after the
condition for
running the DTC
are met.

• ESO solenoid valve control

circuit is open circuit, high
resistance or short to ground.

• Faulty PCU.

• Faulty ECM.

P0215

(D)

52 ON

Engine

Shutoff

(ESO) Solenoid
Control Circuit

• The ignition switch

is OFF.

• The ECM detects

internal CAN
controller does not
Bus OFF mode.

• Faulty ECM.

P0216

(A)

54 ON

Injection

Timing

Control Circuit

• The engine speed

is higher than 700
RPM.

• The fuel injection

quantity is higher
than 4 mg/strk.

• The PCU monitored

actual fuel injection
timing is advanced
more than desired
by 3°CA for longer
than 12 seconds or
retarded more than
desired by 6°CA for
longer than 12
seconds.

• Excessive air in the fuel system.

• Loss fuel.

• Fuel suction side looseness,

kinks or blocked.

• Faulty or clogged fuel filter.

• Contaminated fuel.

• Faulty timing device.

• Faulty fuel injection pump CMP

sensor.

P0216

(B)

54 ON

Injection

Timing

Control Circuit

• The engine speed

is higher than 2014
RPM.

• The PCU monitored

actual fuel injection
timing is oscillated
higher than desired
by 5.2°CA.

• Excessive air in the fuel system.

• Loss fuel.

• Fuel suction side looseness,

kinks or blocked.

• Faulty or clogged fuel filter.

• Contaminated fuel.

• Faulty timing device.

• Faulty fuel injection pump CMP

sensor.

Engine Control System (4JH1) 6E-53

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

(3)

64 ON

Turbocharger
Waste gate
Solenoid Boost
Solenoid Circuit

• The ignition switch

is ON.

• The BARO is

between 0 hPa and
3500 hPa.

• The IAT is between

-50°C (-58 °F) and
200°C (392°F).

• The ECT is

between -50°C (-
58 °F) and 150°C
(302°F).

• The ECM detects

that the vacuum
pressure is 50 hPa
lower than the
desired vacuum
pressure for 3
seconds.

• Vacuum pressure sensor circuits

are high resistance.

• Faulty vacuum hoses

• Misrouted vacuum hoses.

• Faulty vacuum pressure sensor.

• Faulty turbocharger solenoid

valve.

• Faulty vacuum regulating valve.

• Faulty turbocharger wastegate

valve.

• Faulty ECM.

P0243

(4)

64 ON

Turbocharger
Waste gate
Solenoid Boost
Solenoid Circuit
Low Voltage

• The ignition switch

is ON.

• The ECM detects

that the low voltage
condition on the
turbocharger
solenoid valve
control circuit for
longer than 3
seconds when the
solenoid valve is
commanded OFF.

• ECM (10A) fuse (EB1) open.

• Turbocharger solenoid valve

ignition voltage feed circuit is
open circuit or high resistance.

• Turbocharger solenoid valve

control circuit is open circuit,
high resistance or short to
ground.

• Poor harness connector

connection.

• Faulty turbocharger solenoid

valve.

• Faulty ECM.

P0243

(5)

64 ON

Turbocharger
Wastegate
Solenoid Boost
Solenoid Circuit

• The ignition switch

is ON.

• The BARO is

between 0 hPa and
3500 hPa.

• The IAT is between

-50°C (-58 °F) and
200°C (392°F).

• The ECT is

between -50°C (-
58 °F) and 150°C
(302°F).

• The ECM detects

that the vacuum
pressure is 50 hPa
higher than the
desired vacuum
pressure for 3
seconds.

• Vacuum pressure sensor low

reference circuit is high
resistance.

• Faulty vacuum hoses

• Misrouted vacuum hoses.

• Faulty vacuum pressure sensor.

• Faulty turbocharger solenoid

valve.

• Faulty vacuum regulating valve.

• Faulty turbocharger wastegate

valve.

• Faulty ECM.

P0243

(6)

64 ON

Turbocharger
Waste gate
Solenoid Boost
Solenoid Circuit

• The ignition switch

is ON.

• The ECT is

between -50°C (-
58 °F) and 150°C
(302°F).

• The EGR solenoid

valve control is
OFF.

• The MAF sensor

DTC P0100 is not
set.

• The vacuum

pressure sensor
DTC P0105 is not
set.

• The IAT sensor

DTC P0110 is not
set.

• The ECM detects

that the MAF
amount is 56
mg/strk higher than
the desired MAF for
3 seconds.

• Faulty turbocharger wastegate

valve.

• MAF sensor low reference circuit

is high resistance.

• Faulty EGR valve vacuum

control system.

• Faulty EGR valve.

• Faulty EGR solenoid valve.

• Faulty EGR solenoid valve

vacuum hose routing.

• Faulty MAF sensor.