2007 ISUZU KB P190 Workshop Repair Manual

immobilizer tow brake sensor high beam air bleeding bolt pattern

Page 1793 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 6E-176 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
DTC P0501 (Flash Code 25)
Circuit Description
The vehicle speed sensor (VSS) is used by the ECM
and speedometer, which generates a speed signal from
the tr

6E-176 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
DTC P0501 (Flash Code 25)
Circuit Description
The vehicle speed sensor (VSS) is used by the ECM
and speedometer, which generates a speed signal from
the transmission output shaft rotational speed or
transfer output shaft rotational speed. The sensor has
the following circuits.
• Ignition voltage feed circuit
• Low reference circuit
• VSS signal circuit
The VSS uses a hall effect element. It interacts with the
magnetic field created by the rotating magnet and
outputs square wave pulse signal. The ECM calculates
the vehicle speed by the VSS. If the 2WD fitted with
Jatco automatic transmission, VSS signals are sent
from the TCM. If the ECM detects VSS signals are
sharply changed, this DTC will set.
Condition for Running the DTC • The ignition voltage is more than 9 volts.
• The ignition switch is ON.
Condition for Setting the DTC • The ECM detects that the VSS signal are changed larger than a predetermined vehicle speed within a
very short calibrated time. Action Taken When the DTC Sets
• The ECM illuminates the MIL when the diagnostic runs and fails. Refer to DTC Type Definitions for
Action Taken When the DTC Sets - Type A.
• The ECM inhibits cruise control.
Condition for Clearing the DTC • Refer to DTC Type Definitions for Condition for Clearing the MIL/ DTC - Type A.
Diagnostic Aids • If an intermittent condition is suspected, refer to Intermittent Conditions in this section.
• Electromagnetic interference in the VSS circuits may set this DTC.
Notice: • If this DTC set, the Vehicle Speed parameter on the scan tool will display 3 km/h (2 MPH).
Schematic Reference: Engine Controls Schematics
Connector End View Reference: Engine Controls
Connector End Views or ECM Connector End Views
Circuit/ System Testing DTC P0501
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. Inspect all of the circuits going to the vehicle
speed sensor (VSS) for the following
conditions:
• Routed too closely to fuel injection wiring or components
• Routed too closely to after-market add- on electrical equipment
• Routed too closely to solenoids, relays, and motors
2. If you find incorrect routing, correct the harness routing.
Did you find and correct the condition? —
Go to Step 8 Go to Step 3
3 1. Inspect for an intermittent, for poor
connections and corrosion at the Meter (10A)
fuse.
2. Repair the connection(s) as necessary.
Did you find and correct the condition? —
Go to Step 8 Go to Step 4
4 1. Inspect for an intermittent, a poor connection
and corrosion at the ground terminal (E-10).
2. Repair the connection(s) as necessary.
Did you find and correct the condition? —
Go to Step 8 Go to Step 5

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ISUZU KB P190 2007

Page 1794 of 6020

ISUZU KB P190 2007 Workshop Repair Manual ENGINE CONTROL SYSTEM (4JK1/4JJ1) 6E-177
51. Turn OFF the ignition.
2. Disconnect the VSS harness connector.
3. Inspect for an intermittent, for poor connections and corrosion at the harness
conn

Page 1795 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 6E-178 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
DTC P0512 (Flash Code 417)
Circuit Description
The starter switch signal is inputted to the ECM during
the ignition switch START position. If the ECM detec

6E-178 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
DTC P0512 (Flash Code 417)
Circuit Description
The starter switch signal is inputted to the ECM during
the ignition switch START position. If the ECM detects
the starter switch signal continuously ON during the
engine running, this DTC will set.
Condition for Running the DTC • The ignition switch is ON.
• The engine is running.
Condition for Setting the DTC • The ECM detects that the starter switch signal is stuck at the ON position (high voltage) for longer
than 20 seconds.
Action Taken When the DTC Sets • The ECM illuminates the SVS lamp when the diagnostic runs and fails. Refer to DTC Type
Definitions for Action Taken When the DTC Sets -
Type C. Condition for Clearing the DTC
• Refer to DTC Type Definitions for Condition for Clearing the SVS Lamp/ DTC - Type C.
Diagnostic Aids • If an intermittent condition is suspected, refer to Intermittent Conditions in this section.
Notice: • This DTC will set if the ignition switch continues being START position for longer than 20 seconds.
Schematic Reference: Engine Controls Schematics
Connector End View Reference: Engine Controls
Connector End Views or ECM Connector End Views
Circuit/ System Testing DTC P0512
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. Turn OFF the ignition.
2. Remove the starter cut relay in order to inhibit starter motor engagement at ignition switch
ON.
3. Install a scan tool.
4. Turn ON the ignition, with the engine OFF.
5. Observe the Starter Switch parameter with a scan tool.
Does the Starter Switch parameter indicate OFF? —
Go to Diagnostic Aids Go to Step 3
3 Remove the Starter (10A) fuse in the cabin fuse
block.
Does the Starter Switch parameter indicate OFF? —
Go to Step 4 Go to Step 5
4 1. Test the signal circuit between the starter
switch (pin 1 of B-63) and each terminal of the
ignition switch (pins 1, 2, 3 and 4 of B-62 and
pin 3 of B-63) for short circuit each other at the
ignition switch ON.
2. Repair the circuit(s) as necessary.
Did you find and correct the condition? —
Go to Step 8 Go to Step 7
5 1. Test the signal circuit between the ECM (pin
44 of C-58) and the Starter (10A) fuse or
starter relay (pin 3 of X-8) for a short to battery
or ignition voltage.
2. Repair the circuit(s) as necessary.
Did you find and correct the condition? —
Go to Step 8 Go to Step 6

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Page 1796 of 6020

ISUZU KB P190 2007 Workshop Repair Manual ENGINE CONTROL SYSTEM (4JK1/4JJ1) 6E-179
61. Turn OFF the ignition.
2. Disconnect the ECM harness connector.
3. Inspect the connection on the starter switch signal circuit at the harness connector

Page 1797 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 6E-180 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
DTC P0562 or P0563 (Flash Code 35)
Circuit Description
The ECM monitors the ignition voltage on the ignition
feed terminal to make sure that the voltage st

6E-180 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
DTC P0562 or P0563 (Flash Code 35)
Circuit Description
The ECM monitors the ignition voltage on the ignition
feed terminal to make sure that the voltage stays within
the proper range. If the ECM detects an excessively
low or high ignition voltage, DTC P0562 or P0563 will
set.
Condition for Running the DTC • The battery voltage is more than 9 volts.
Condition for Setting the DTC • The ECM detects that the ignition voltage feed circuit is less than 8 volts for 5 seconds. (DTC
P0562)
• The ECM detects that the ignition voltage feed circuit is more than 16 volts for 5 seconds. (DTC
P0563)
Action Taken When the DTC Sets • The ECM illuminates the SVS lamp when the diagnostic runs and fails. Refer to DTC Type
Definitions for Action Taken When the DTC Sets -
Type C. (Euro 4 Specification) • The ECM illuminates the MIL when the diagnostic
runs and fails. Refer to DTC Type Definitions for
Action Taken When the DTC Sets - Type A.
(Except Euro 4 Specification)
• The ECM limits fuel injection quantity. (DTC P0563)
• The ECM inhibits pilot injection. (DTC P0563)
• The ECM inhibits cruise control. (DTC P0563)
Condition for Clearing the DTC • Refer to DTC Type Definitions for Condition for Clearing the SVS Lamp/ DTC - Type C. (Euro 4
Specification)
• Refer to DTC Type Definitions for Condition for Clearing the MIL/ DTC - Type A. (Except Euro 4
Specification)
Diagnostic Aids • A charging system problem may set this DTC.
• The weakened battery may set DTC P0562.
• Jump starting the vehicle or a battery charger may have set this DTC P0563.
Schematic Reference: Engine Controls Schematics
Connector End View Reference: Engine Controls
Connector End Views or ECM Connector End Views
Circuit/ System Testing DTC P0562
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 a scan tool.
2. Turn OFF the ignition for 30 seconds.
3. Start the engine and let idle.
4. Load the electrical system by turning ON the headlights, A/C, etc. while observing the
Ignition Voltage parameter with a scan tool.
Does the scan tool indicate more than the specified
value? 10.0 volts
Go to Diagnostic Aids Go to Step 3
3 Test the charging system. Refer to Diagnosis of
The Charging System in the Charging System
Section.
Did you find a charging system problem? —
Go to Step 4 Go to Step 5
4 Repair the charging system. Refer to Diagnosis of
The Charging System in the Charging System
Section.
Did you complete the repair? —
Go to Step 6
—

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ISUZU KB P190 2007

Page 1798 of 6020

ISUZU KB P190 2007 Workshop Repair Manual ENGINE CONTROL SYSTEM (4JK1/4JJ1) 6E-181
Circuit/ System Testing DTC P0563
51. Turn OFF the ignition.
2. Disconnect the ECM harness connector.
3. Inspect for an intermittent, for a poor connection

Page 1799 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 6E-182 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
61. 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

Page 1800 of 6020

ISUZU KB P190 2007 Workshop Repair Manual ENGINE CONTROL SYSTEM (4JK1/4JJ1) 6E-183
DTC P0565 (Flash Code 515)
Circuit Description
The cruise control keeps the vehicle speed at a drivers
set speed. When the cruise main switch is turned ON

ENGINE CONTROL SYSTEM (4JK1/4JJ1) 6E-183
DTC P0565 (Flash Code 515)
Circuit Description
The cruise control keeps the vehicle speed at a driver's
set speed. When the cruise main switch is turned ON,
signal is provided to the ECM and the cruise main
indicator lamp on the switch or the instrument panel
cluster will light up. If the ECM detects the cruise main
switch signal repeats ON/ OFF or continuously ON, this
DTC will set.
Condition for Running the DTC • The ignition switch is ON.
• The engine is running.
Condition for Setting the DTC
Either of following condition is met: • The ECM detects that the cruise main switch signal is repeated ON/ OFF continuously within a
very short calibrated time.
• The ECM detects that the cruise main switch signal is stuck at the ON position (high voltage) for
longer than 15 seconds. Action Taken When the DTC Sets
• The ECM will not illuminate the MIL or SVS lamp. Refer to DTC Type Definitions for Action Taken
When the DTC Sets - Type D.
• The ECM inhibits cruise control.
Condition for Clearing the DTC • Refer to DTC Type Definitions for Condition for Clearing the DTC - Type D.
Diagnostic Aids • If an intermittent condition is suspected, refer to Intermittent Conditions in this section.
Notice: • This DTC will set if the cruise main switch continues being pushed for longer than 15
seconds.
Schematic Reference: Engine Controls Schematics
Connector End View Reference: Engine Controls
Connector End Views or ECM Connector End Views
Circuit/ System Testing DTC P0565
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 a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. Observe the Cruise Main Switch parameter with a scan tool.
Does the scan tool indicate ON when the switch is
pushed and OFF when the switch is released? —
Go to Diagnostic Aids Go to Step 3
3 1. Turn OFF the ignition.
2. Disconnect the cruise main switch harness connector. (Remove the switch from the IP
bezel as necessary)
3. Turn ON the ignition, with the engine OFF.
Does the Cruise Main Switch indicate OFF? —
Go to Step 5 Go to Step 4
4 1. Test the signal circuit between the ECM (pin
14 of C-58) and the cruise main switch (pin 3
of B-67) for a short to battery or 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 Repair or replace the cruise main switch.
Did you complete the repair or replacement? —
Go to Step 7
—
6Important:
Replacement ECM must be
programmed and learned.
Replace the ECM. Refer to ECM Replacement.
Did you complete the replacement? —
Go to Step 7
—

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ISUZU KB P190 2007

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