Isuzu KB P190. Manual — part 273

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.

• 2WD 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 2WD 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.

Engine Control System (4JH1) 6E-59

DTC

(Symptom

Code)

Flash

Code

MIL

Status

DTC Name on

scan tool

Condition for

Running the DTC

Condition for

Setting the DTC

Possible Cause

P0606

(A)

28 ON

Control

Module

Internal
Performance



• The ECM detects

that the internal
CPU does not
react.

• Faulty ECM.

P0606

(B)

28 ON

Control

Module

Internal
Performance

• The accelerator

pedal position is
less than 1%.

• The desired fuel

injection quantity is
0 mg/strk.

• The ECM detects

that the engine
speed is higher
than 2000 RPM.

• Faulty ECM.

P0645

(4)

46 ON

Air

Conditioning

(A/C) Clutch Relay
Control Circuit Low
Voltage

• The ignition switch

is ON.

• The A/C

compressor relay is
once commanded
ON.

• The ECM detects

that the low voltage
condition on the
A/C compressor
relay control circuit
for longer than 3
seconds when the
relay is commanded
OFF.

• ECM (10A) fuse (EB1) open.

• A/C compressor relay ignition

voltage feed circuit on coil side is
open circuit or high resistance.

• A/C compressor relay control

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

• A/C compressor relay is poor

installation.

• Faulty A/C compressor relay.

• Faulty ECM.

P0645

(8)

46 ON

Air

Conditioning

(A/C) Clutch Relay
Control Circuit
High Voltage

• The ignition switch

is ON.

• The A/C

compressor relay is
once commanded
ON.

• The ECM detects

that the high
voltage condition on
the A/C compressor
relay control circuit
for longer than 3
seconds when the
relay is commanded
ON.

• A/C compressor relay control

circuit is short to battery or
ignition voltage circuit.

• Faulty A/C compressor relay.

• Faulty ECM.

P0703

(A)

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 ON
(Applied) when the
brake pedal 2
switch is OFF
(Released) for
longer than 30
seconds within the
enabling conditions
ever since ignition
switch is ON.

• 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.

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.

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.