ignition ISUZU KB P190 2007 Workshop Repair Manual

ENGINE CONTROL SYSTEM (4JK1/4JJ1) 6E-33
Pin No. Wire ColorPin Function
43 — Not used
44 RED/ WHT Starter switch signal
45 BLU/ RED ECM main relay control
46 — Not used
47 — Not used
48 — Not used
49 GRN/ YEL Cruise set lamp control
50 GRN/ WHT Cruise main lamp control
51 — Not used
52 RED/ WHT Battery voltage (Back-up)
53 — Not used
54 ORN/ BLK Fuel pump relay control
55 GRY/ RED A/C compressor relay control
56 RED/ WHT Accelerator pedal position signal
output
57 BRN/ YEL MIL control
58 — Not used
59 — Not used
60 — Not used
61 — Not used
62 BLK/ YEL VSS signal
63 BLK Ground
64 — Not used
65 BLU/ RED ECM main relay control
66 YEL CAN High
67 BLU CAN Low
68 — Not used
69 BRN/ RED Fuel filter lamp control
70 ORN/ WHT Fuel consumption signal output
71 PNK/ WHT SVS lamp control (Euro 4
specification)
72 WHT/ GRN Ignition voltage
73 RED/ BLU Battery voltage

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ENGINE CONTROL SYSTEM (4JK1/4JJ1) 6E-35
Brake SwitchClutch Switch
Camshaft Position (CMP) Sensor
Connector No.
E-107
Connector Color Black
Test Adapter No. J-35616-64A
Pin No. Wire Color Pin Function
1 YEL Sensor signal
2 BLU Sensor low reference
3 GRN Sensor 5V reference
Connector No. C-44
Connector Color White
Test Adapter No. J-35616-40 (Pin1-2)
J-35616-2A (Pin3-4)
Pin No. Wire Color Pin Function
1GRN Switch 1 (stop lamp switch)
battery voltage feed
2 RED Switch 1 (stop lamp switch) signal
3 ORN Switch 2 signal
4WHT/ GRN Brake switch 2 ignition voltage
feed
RTW76ESH000801
12
34Connector No. C-77
Connector Color White
Test Adapter No. J-35616-42
Pin No. Wire Color Pin Function
1 WHT/ GRN Ignition voltage feed
2 YEL Switch signal
LNW46ESH000801
1
2
RTW76ESH000701
123

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6E-36 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
Crankshaft Position (CKP) SensorCruise Main Switch
Data Link Connector (DLC)
Connector No.
E-39
Connector Color Black
Test Adapter No. J-35616-64A
Pin No. Wire Color Pin Function
1 WHT Sensor signal
2 BLK Sensor low reference
3 RED Sensor 5V reference
Connector No. E-52
Connector Color Black
Test Adapter No. J-35616-64A
Pin No. Wire Color Pin Function
1 YEL Sensor signal
2 BLU Sensor low reference
3 GRN Sensor 5V reference
RTW76ESH000701
123
Connector No. B-67
Connector Color White
Test Adapter No. J-35616-33
Pin No. Wire Color Pin Function
1 RED/ GRN Illumination lamp ground
2 GRN/ RED Illumination lamp voltage feed
3 WHT/ GRN Cruise main switch signal
4WHT/ GRN Cruise main switch ignition
voltage
5 — Not used
6 GRN/ WHT Cruise main switch ignition lamp
ground
RTW76ESH001101
123456
LNW36ESH015801
87654321
16151413121110
9

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ENGINE CONTROL SYSTEM (4JK1/4JJ1) 6E-41
Intake Throttle ValveSwirl Control Solenoid Valve
Turbocharger Nozzle Control Solenoid Valve
Connector No. E-47
Connector Color Black
Test Adapter No. J-35616-64A
Pin No. Wire Color Pin Function
1 RED/ BLU MAF sensor ignition voltage feed
2 WHT/ BLU MAF sensor low reference
3 ORN/ BLU MAF sensor signal
4 BLU/ RED IAT sensor signal
5 BLU/ GRN IAT sensor low reference
Connector No. E-38
Connector Color Black
Test Adapter No. J-35616-64A
Pin No. Wire Color Pin Function
1 RED Solenoid control low side (PWM)
2 WHT Solenoid drive voltage
3 BLU Position sensor low reference
4 — Not used
5 ORN Position sensor signal
6 GRY Position sensor 5V reference
RTW76ESH000401
456
123
Connector No. E-67
Connector Color Brown
Test Adapter No. J-35616-64A
Pin No. Wire Color Pin Function 1 YEL Solenoid valve control
2 RED/ BLU Ignition voltage feed
RTW76ESH000201
12
RTW76ESH000101
21

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6E-42 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
Vehicle Speed Sensor (VSS)
Connector No.E-106
Connector Color Brown
Test Adapter No. J-35616-64A
Pin No. Wire Color Pin Function
1 YEL/ BLK Solenoid valve control (PWM)
2 RED/ BLU Ignition voltage feed
Connector No. E-44
Connector Color Gray
Test Adapter No. J-35616-64A
Pin No. Wire Color Pin Function
1 YEL Ignition voltage feed
2 GRN/ WHT Sensor low reference
3 BLK/ YEL Sensor signal
LNW46ESH001401
12 3

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6E-44 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
Diagnostic Starting Point - Engine Controls
Begin the system diagnosis with Diagnostic System
Check - Engine Controls. The Diagnostic System
Check - Engine Controls will provide the following
information:
• The identification of the control modules which command the system.
• The ability of the control modules to communicate through the serial data circuit.
• The identification of any stored diagnostic trouble codes (DTCs) and the their statuses.
The use of the Diagnostic System Check - Engine
Controls will identify the correct procedure for
diagnosing the system and where the procedure is
located.
Important: Engine Control System Check Sheet must
be used to verify the complaint vehicle, you need to
know the correct (normal) operating behavior of the
system and verify that the customer complaint is a valid
failure of the system. Reading Flash Diagnostic Trouble Codes (DTC)
The provision for communicating with the ECM is the
Data Link Connector (DLC). The DTC(s) stored in the
ECM memory can be read either through a hand-held
diagnostic scanner such as Tech 2 plugged into the
DLC or by counting the number of flashes of the
malfunction indicator lamp (MIL) or the service vehicle
soon (SVS) lamp when the diagnostic test terminal of
the DLC is grounded. The DLC terminal "1" (diagnostic
request) is pulled "Low" (grounded) by jumped to DLC
terminal "4", which is a ground wire. Once terminals "1"
and "4" have been connected, turn the ignition switch
ON, with the engine OFF. The MIL (except Euro 4
specification) or the SVS lamp (Euro 4 specification)
will indicate a DTC three times is a DTC is present and
history. If more than one DTC has been stored in the
ECM's memory, the DTCs will be output set order with
each DTC being displayed three times. The flash DTC
display will continue as long as the DLC is shorted.
RTW76ESF000301
ON
OFF
ON
OFF
1.2
3.2
2.62.6
2nd digit number1st digit number
3.20.6 2
1.2
0.60.60.6
0.30.30.3
0.30.30.30.30.3
Example:DTC 23 stored
Unit: Second
Example:DTC 225 stored
3rd digit
number 2nd digit number1st digit number
0.60.60.60.60.60.60.60.6
3
0.30.31.21.2
2
25

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ENGINE CONTROL SYSTEM (4JK1/4JJ1) 6E-45
Diagnostic System Check - Engine Controls
Description
The Diagnostic System Check - Engine Controls is an
organized approach to identifying a condition that is
created by a malfunction in the electronic engine
control system. The Diagnostic System Check must be
the starting point for any driveability concern. The
Diagnostic System Check directs the service technician
to the next logical step in order to diagnose the
concern. Understanding and correctly using the
diagnostic table reduces diagnostic time, and prevents
the replacement of good parts.
Test Description
The numbers below refer to the step numbers on the
diagnostic table.
2. Lack of communication may be because of a partial
or a total malfunction of the serial data circuit.
7. The presence of DTCs which begin with U, indicate
that some other module is not communicating.
10. If there are other modules with DTCs set, refer to
the DTC list. The DTC list directs you to the appropriate
diagnostic procedure. If the control module stores
multiple DTCs, diagnose the DTCs in the following
order:
• Component level DTCs, such as sensor DTCs, solenoid DTCs, actuator DTCs, and relay DTCs.
Diagnose the multiple DTCs within this category in
numerical order. Begin with the lowest numbered
DTC, unless the diagnostic table directs you
otherwise. Diagnostic System Check Engine Controls
Important:
• DO NOT perform this diagnostic if there is not a driveability concern, unless another procedure
directs you to this diagnostic.
• Before you proceed with diagnosis, search for applicable service bulletins.
• Unless a diagnostic procedure instructs you, DO NOT clear the DTCs.
• If there is a condition with the starting system, refer to the starting system section in the engine
mechanical.
• Ensure the battery has a full charge.
• Ensure the battery cables (+) (-) are clean and tight.
• Ensure the ECM grounds are clean, tight, and in the correct location.
• Ensure the ECM harness connectors are clean and correctly connected. DO NOT attempt to
crank the engine with ECM harness connectors
disconnect.
• Ensure the ECM terminals are clean and correctly mating.
• Ensure the fuel injector ID code data is correctly programmed in to the ECM.
• Ensure the immobilizer security information is correctly programmed into the ECM and
immobilizer control unit (ICU).
• If there are fuel system DTC’s (P0087, P0088, P0089, P0093, P1093 or P1094), diagnose sensor
DTCs, solenoid DTCs, actuator DTCs and relay
DTCs first.
Diagnostic System Check - Engine Controls
Step Action Value(s)Yes No
1 Install a scan tool.
Does the scan tool turn ON? —
Go to Step 2 Go to Scan Tool
Does Not Power Up
2 1. Turn ON the ignition, with the engine OFF.
2. Attempt to establish communication with the listed control modules.
•ECM
• Immobilizer control unit (ICU) (If so equipped)
• Transmission control module (TCM) (AISIN A/T only)
Does the scan tool communicate with all the listed
control modules? —
Go to Step 3 Go to Scan Tool
Does Not
Communicate with CAN Device

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6E-48 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
Fuel Rail Pressure SensorVolts1.4 to 1.5 volts More than 2.1 volts (4JJ1 Euro 4
specification)
More than 1.8 volts (4JJ1 except Euro 4 specification)
More than 1.9 volts (4JK1)
FRP Regulator Command (Fuel Rail Pressure) %
35 to 50 % 35 to 45 %
FRP Regulator Commanded Fuel Flow mm
3/sec More than 1,000 mm3/sec More than 2,000 mm3/sec
FRP Regulator Feedback (Fuel Rail Pressure) mA
1,600 to 2,000 mA 1,500 to 1,800 mA
Accelerator Pedal Position %0% 10 to 25 %
APP Sensor 1 (Accelerator Pedal Position) Volts
0.2 to 1.0 volts 1.0 to 1.7 volts
APP Sensor 2 (Accelerator Pedal Position) Volts
3.8 to 4.6 volts 3.3 to 3.9 volts
APP Sensor 3 (Accelerator Pedal Position) Volts
3.8 to 4.6 volts 3.7 to 4.0 volts
EGR Solenoid Command %Less than 30 % Less than 30 %
Desired EGR Position %Less than 70 % Less than 80 %
EGR Position %Less than 70 % Less than 80 %
EGR Position Sensor VoltsLess than 2.9 volts Less than 3.1 volts
Intake Throttle Solenoid Command %
Less than 30 % Less than 40 %
Desired Intake Throttle Position %Less than 30 % Less than 80 %
Intake Throttle Position %Less than 30 % Less than 80 %
Intake Throttle Position Sensor Volts Less than 1.6 voltsLess than 3.3 volts
Desired Injection Quantity mm
37 to 12 mm37 to 12 mm3
Main Injection Quantitymm33 to 8 mm35 to 10 mm3
Main Injection Timing°CA 2 to 12 °CA 0 to 10 °CA
Main Injection On Time ms600 to 800 ms 400 to 550 ms
Pre Injection Quantity mm
31 to 4 mm32 to 4 mm3
Pre Injection Interval°CA 3 to 20 °CA 10 to 30 °CA
Fuel Compensation Cyl. 1 mm
3-5.0 to 5.0 mm3 (varies)0.0 mm3
Fuel Compensation Cyl. 2 mm3-5.0 to 5.0 mm3 (varies)0.0 mm3
Fuel Compensation Cyl. 3 mm3-5.0 to 5.0 mm3 (varies)0.0 mm3
Fuel Compensation Cyl. 4 mm3-5.0 to 5.0 mm3 (varies)0.0 mm3
Cylinder Balancing Update Enabled/ Disabled EnabledDisabled
Fuel Supply Pump Status Not Learn/ Learning/ LearnedLearning or Learned
Learning or Learned
Rail Pressure Feedback Mode Wait Mode/ Feedback Mode/ Shutoff Mode Feedback Mode
Feedback Mode
Engine Running Status Off/ Ignition On/ Cranking/ Running Running
Running
Scan Tool Parameter Units Displayed Typical Data Value at Engine Idle Typical Data Value at 2000RPM

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ENGINE CONTROL SYSTEM (4JK1/4JJ1) 6E-49
Cam/ Crank Sensor Signal Synchronization Status Asynchronous/ No
Crank Signal/ Synchronous Synchronous Synchronous
Engine Runtime Time (hour: minute: second) Va r i e s
Va r i e s
Vehicle Speed km/h / MPH0 km/h / 0 MPH 0 km/h / 0 MPH
Transmission Gear Out of gear/ 1st/ 2nd/ 3rd/ 4th/ 5th Out of gear
Out of gear
Starter Switch On/OffOn On
Ignition Switch On/OffOn On
Ignition Voltage Volts11.0 to 15.0 volts 11.0 to 15.0 volts
Battery Voltage Volts11.0 to 15.0 volts 11.0 to 15.0 volts
Fuel Pump Relay Command On/ Off OnOn
Swirl Control Solenoid Command On/ Off OnOn
Fuel Filter Switch On/ OffOn On
A/C Request Signal On/ OffOff Off
A/C Relay Command On/ OffOff Off
Park/ Neutral Switch Neutral/ In Gear NeutralNeutral
Glow Relay Command On/ OffOff Off
Glow Plug Lamp Command On/ Off OffOff
Brake Switch 1 Applied/ Released Released Released
Brake Switch 2 Applied/ Released Released Released
Clutch Pedal Switch Applied/ Released ReleasedReleased
Cruise Main Lamp Command On/ Off OffOff
Cruise Main Switch On/ OffOff Off
Cruise Cancel Switch On/ OffOn On
Cruise Resume Switch On/ OffOff Off
Cruise Set Switch On/ OffOff Off
MIL Command (Malfunction Indicator Lamp) On/ Off
Off Off
SVS Lamp Command (Service Vehicle Soon) On/ Off
Off Off
Limp Home Mode None/ 1/ 2/ 3/ 4 None None
Distance While MIL is Activated km/ Mile 0 km/ 0 Mile0 km/ 0 Mile
Engine Runtime With MIL Active minutes 00
Total Engine Overspeed Event Counter VariesVaries
Total Engine Coolant
Overtemperature Event Counter
Varies Varies
Total Fuel Temperature
Overtemperatrure Event Counter
Varies Varies
Total Intake Air Temperature Overtemperaure Event Counter
Varies Varies
Immobilizer Function Programmed Ye s / N o
Ye s Ye s
Wrong Immobilizer Signal Yes/ NoNo No
Scan Tool Parameter Units Displayed Typical Data Value at Engine Idle Typical Data Value at 2000RPM

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6E-52 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
Desired EGR Position
This parameter displays EGR position desired by the
ECM based on current driving conditions. This can be
compared to the actual EGR position to determine
sensor accuracy or EGR control problems.
EGR Position
This parameter displays the EGR valve position
calculated by the ECM using the signal from EGR
position sensor. The scan tool will display a low
percentage when the EGR valve is closed, and a high
percentage when the ERG valve is opened.
EGR Position Sensor
This parameter displays the voltage signal sent to the
ECM from the EGR position sensor. EGR position
sensor is a range of value indicating a low voltage
when the EGR valve is closed, and a high voltage when
the EGR valve is opened.
Intake Throttle Solenoid Command
This parameter displays the intake throttle solenoid
valve control duty ratio based on inputs to the ECM
from various engine sensors. The scan tool will display
a lower percentage when the intake throttle solenoid
valve is controlled to open. The scan tool will display a
higher percentage when the intake throttle solenoid
valve is controlled to close.
Desired Intake Throttle Position
This parameter displays intake throttle position desired
by the ECM based on current driving conditions. This
can be compared to the actual intake throttle position to
determine sensor accuracy or intake throttle control
problems.
Intake Throttle Position
This parameter displays the intake throttle valve
position calculated by the ECM using the signal from
intake throttle position sensor. The scan tool will display
a low percentage when the intake throttle valve is
closed, and a high percentage when the intake throttle
valve is opened. Note that the intake throttle position
indicates over 100% if the solenoid is commanded
OFF.
Intake Throttle Position Sensor
This parameter displays the voltage signal sent to the
ECM from the intake throttle position sensor. Intake
throttle position sensor is a range of value indicating a
low voltage when the intake throttle valve is closed to a
high voltage when the intake throttle valve is opened.
Desired Injection Quantity
This parameter displays a total injection quantity (main
injection quantity + pre injection quantity) desired by
the ECM based on current driving conditions.
Main Injection Quantity
This parameter displays a main injection quantity
desired by the ECM based on current driving
conditions. Main Injection Timing
This parameter displays a main injection timing desired
by the ECM based on current driving conditions.
Main Injection On Time
This parameter displays the time the ECM turns ON the
fuel injectors. The scan tool will display a higher value
with a longer pulse width, or a lower value with a
shorter pulse width.
Pre Injection Quantity
This parameter displays a pilot injection quantity
desired by the ECM based on current driving
conditions.
Pre Injection Interval
This parameter displays a injection interval between
end of pilot injection and start of main injection desired
by the ECM based on current driving condition.
Fuel Compensation Cyl. 1 to 4
This parameter displays the adjustment of fuel volume
for each cylinder at low engine speed area as
calculated by the ECM. The scan tool will display a
negative value if the fuel volume is lowered. The scan
tool will display a positive value if the fuel volume is
increased. If there is a cylinder that is excessively high
or low value, it may indicate faulty fuel injector, weak or
slightly seized cylinder or an incorrectly programmed
fuel injector ID code.
Cylinder Balancing Update
This parameter displays the state of the fuel
compensation for each cylinder. Enabled indicates the
adjustment of fuel volume for each cylinder is being
executed by the ECM when the engine is idle speed,
the engine coolant temperature sensor, the intake air
temperature sensor, barometric pressure sensor and
the vehicle speed sensor inputs are normal state.
Fuel Supply Pump Status
This parameter displays the learning state of the fuel
supply pump. Not Learn indicates initialized state that is
replaced to a new ECM or adjustment value is reset.
After engine is warm upped, leaning will start at idle
speed. Learning indicates learning state. Learned
indicates learning process is completed state.
Rail Pressure Feedback Mode
This parameter displays the state of the fuel rail
pressure feedback to the ECM. Wait Mode indicates
the ignition switch is turned ON position. Feedback
Mode indicates the engine is during crank or run.
Shutoff Mode indicates the ignition switch is turned
OFF position.
Engine Mode
This parameter displays the state of engine. Ignition On
indicates the ignition switch is turned ON position.
Cranking indicates the engine is during crank. Running
indicates the engine is run. Off indicates the ignition
switch is tuned OFF position.

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