2007 ISUZU KB P190 Workshop Repair Manual

auxiliary battery location fog light fuse timing belt clock reset differential

Page 1817 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 6E-200 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
DTC P0633 (Flash Code 176)
Circuit Description
The electronically erasable & programmable read only
memory (EEPROM) memorizes immobilizer security
informat

6E-200 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
DTC P0633 (Flash Code 176)
Circuit Description
The electronically erasable & programmable read only
memory (EEPROM) memorizes immobilizer security
information for communication with the immobilizer
control unit (ICU) and enabling the engine to start. If the
ECM detects immobilizer security information are not
programmed into the ECM, this DTC will set.
Condition for Setting the DTC • The ECM detects that the immobilizer security information is not programmed.
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)
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 • Non-programmed ECM sets this DTC.
Circuit/ System Testing DTC P0633
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. Turn ON the ignition, with the engine OFF.
4. Monitor the DTC Information with a scan tool.
Does the DTC fail this ignition? —
Go to Step 3 Go to Diagnostic
Aids
3 Program immobilizer security information into the
ECM. Refer to Resetting and Programming
Guidelines in immobilizer section.
Did you complete the programming? —
Go to Step 4
—
41. Clear the DTCs with a scan tool.
2. Turn OFF the ignition for 30 seconds.
3. Start the engine.
4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the
vehicle within the conditions that you
observed from the Freeze Frame/ Failure
Records.
Did the DTC fail this ignition? —
Go to Step 3 Go to Step 5
5 Observe the DTC Information with a scan tool.
Are there any DTCs that you have not diagnosed? —
Go to DTC List System OK

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Page 1818 of 6020

ISUZU KB P190 2007 Workshop Repair Manual ENGINE CONTROL SYSTEM (4JK1/4JJ1) 6E-201
DTC P0638 (Flash Code 61)
Circuit Description
The ECM controls the intake throttle valve opening
based on the engine running condition and by
controlling t

ENGINE CONTROL SYSTEM (4JK1/4JJ1) 6E-201
DTC P0638 (Flash Code 61)
Circuit Description
The ECM controls the intake throttle valve opening
based on the engine running condition and by
controlling the intake throttle solenoid. The intake
throttle valve position is detected by the position
sensor, and relayed to the ECM. If the ECM detects a
variance between the actual intake throttle position and
desired intake throttle position while the intake throttle
solenoid is commanded ON, this DTC will set.
Condition for Running the DTC • DTCs P0122, P0123, P0698 and P0699 are not set.
• The battery voltage is between 11 to 16 volts.
• The ignition switch is ON.
• The intake throttle solenoid commanded ON.
• The desired intake throttle position is stable.
Condition for Setting the DTC • The ECM detects that the difference between the actual and the desired intake throttle position is
more than 10% for 5 seconds. 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 limits fuel injection quantity.
• The ECM inhibits pilot injection.
• The ECM inhibits EGR control.
• 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.
• A sticking or intermittently sticking intake throttle valve may set this DTC.
• A sticking intake throttle valve at full closed position will cause engine starting problem.
Schematic Reference: Engine Controls Schematics
Connector End View Reference: Engine Controls
Connector End Views or ECM Connector End Views
Circuit/ System Testing DTC P0638
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.
4. Monitor the DTC Information with a scan tool.
Is DTC P0122, P0123, P2100, P2101 or P2103
also set? —
Go to Applicable DTC Go to Step 3
3 1. Perform the Intake Throttle Solenoid Control
with a scan tool several times.
2. Command the Desired Intake Throttle Position Increase and Decrease while observing the
Intake Throttle Position.
Does the Intake Throttle Position parameter follow
within the specified value quick enough (compare
with a similar unit if available)? ±
5%
Go to Diagnostic Aids Go to Step 4

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Page 1819 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 6E-202 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
41. Remove the intake duct that is connected to
the intake throttle valve.
2. Inspect the intake throttle valve for the following conditions:
• Restricted

Page 1820 of 6020

ISUZU KB P190 2007 Workshop Repair Manual ENGINE CONTROL SYSTEM (4JK1/4JJ1) 6E-203
DTC P0642 or P0643 (Flash Code 55)
Circuit Description
The ECM provides 5 volts reference voltage through
the reference circuit 1 to the accelerator pedal

ENGINE CONTROL SYSTEM (4JK1/4JJ1) 6E-203
DTC P0642 or P0643 (Flash Code 55)
Circuit Description
The ECM provides 5 volts reference voltage through
the reference circuit 1 to the accelerator pedal position
(APP) sensor 1. The ECM monitors the voltage on the
5 volts reference circuit 1. If the ECM detects the
voltage is excessively low or high, DTC P0642 or
P0643 will set.
Condition for Running the DTC • The battery voltage is more than 6 volts.
• The ignition switch is ON.
Condition for Setting the DTC • The ECM detects that the 5 volts reference circuit 1 voltage is less than 4.7 volts. (DTC P0642)
• The ECM detects that the 5 volts reference circuit 1 voltage is more than 5.3 volts. (DTC P0643)
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
• The ECM inhibits cruise control.
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 • If an intermittent condition is suspected, refer to Intermittent Conditions in this section.
Schematic Reference: Engine Controls Schematics
Connector End View Reference: Engine Controls
Connector End Views or ECM Connector End Views
Circuit/ System Testing DTC P0642
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.
4. Monitor the DTC Information with a 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 accelerator pedal position (APP) sensor harness connector.
3. Connect a DMM between the 5 volts reference circuit (pin 10 of C-40) and a known good
ground.
4. Turn ON the ignition, with engine OFF.
Is the DMM voltage more than the specified value? 4.7 volts
Go to Step 5 Go to Step 4
4 1. Test the 5 volts reference circuit between the
ECM (pin 11 of C-58) and the APP sensor (pin
10 of C-40) for the following conditions:
• A short to ground
• A short to the low reference circuit
2. Repair the circuit(s) as necessary.
Did you find and correct the condition? —
Go to Step 7 Go to Step 6

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Page 1821 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 6E-204 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
Circuit/ System Testing DTC P0643
5Replace the APP sensor. Refer to APP Sensor
Replacement.
Did you complete the replacement? —
Go to Step 7
—
6Importa

Page 1822 of 6020

ISUZU KB P190 2007 Workshop Repair Manual ENGINE CONTROL SYSTEM (4JK1/4JJ1) 6E-205
51. Reconnect all previously disconnected
harness connector(s).
2. Clear the DTCs with a scan tool.
3. Turn OFF the ignition for 30 seconds.
4. Start the e

Page 1823 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 6E-206 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
DTC P0650 (Flash Code 77)
Circuit Description
The malfunction indicator lamp (MIL) is located on the
instrument panel (IP) cluster. The MIL informs the
dri

6E-206 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
DTC P0650 (Flash Code 77)
Circuit Description
The malfunction indicator lamp (MIL) is located on the
instrument panel (IP) cluster. The MIL informs the
driver that an emission system fault has occurred and
that the engine control system requires service.
The ECM monitors the MIL control circuit for conditions
that are incorrect for the commanded state of the MIL.
For example, a failure condition exists if the ECM
detects low voltage when the MIL is commanded OFF,
or high voltage when the MIL is commanded ON. If the
ECM detects an improper voltage level on the control
circuit, 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
Either of following condition is met: • The ECM detects a low voltage condition on the MIL control circuit when the lamp is commanded
OFF. • The ECM detects a high voltage condition on the
MIL control circuit when the lamp is commanded
ON.
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.
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.
Schematic Reference: Engine Controls Schematics
Connector End View Reference: Engine Controls
Connector End Views or ECM Connector End Views
Circuit/ System Testing DTC P0650
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. Verify whether the instrument panel (IP)
cluster is operational.
2. Install a scan tool.
3. Perform the Malfunction Indicator Lamp (MIL) Control with a scan tool.
4. Command the lamp ON and OFF.
Does the MIL turn ON and OFF with each
command? —
Go to Diagnostic Aids Go to Step 3
3 1. Turn OFF the ignition.
2. Inspect the Meter (10A) fuse in the cabin fuse block.
Is the Meter (10A) fuse open? —
Go to Step 4 Go to Step 5
4 Replace the Meter (10A) fuse. If the fuse continues
to open, repair the short to ground on one of the
circuits that is fed by the Meter (10A) fuse or
replace the shorted attached component.
Did you complete the repair? —
Go to Step 17
—
51. Turn OFF the ignition.
2. Disconnect the ECM J-2 (C-58) harness connector.
3. Turn ON the ignition, with the engine OFF.
Is the MIL OFF? —
Go to Sep 6 Go to Step 12

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Page 1824 of 6020

ISUZU KB P190 2007 Workshop Repair Manual ENGINE CONTROL SYSTEM (4JK1/4JJ1) 6E-207
61. Remove the Meter (10A) fuse that supplies
voltage to the MIL.
2. Turn ON the ignition, with the engine OFF.
3. Measure the voltage from the MIL control

ENGINE CONTROL SYSTEM (4JK1/4JJ1) 6E-207
61. Remove the Meter (10A) fuse that supplies
voltage to the MIL.
2. Turn ON the ignition, with the engine OFF.
3. Measure the voltage from the MIL control circuit in the ECM harness connector (pin 57
of C-58) to a known good ground.
Is the voltage less than the specified value? 1 volt
Go to Step 7 Go to Step 13
7 1. Turn OFF the ignition.
2. Reinstall the Meter (10A) fuse.
3. Turn ON the ignition, with the engine OFF.
4. Connect a 3-amp fused jumper wire between the ECM harness connector (pin 57 of C-58)
and a known good ground.
Is the MIL illuminated? —
Go to Step 11 Go to Step 8
8 1. Turn OFF the ignition.
2. Remove the IP cluster.
3. Connect a test lamp between the ignition voltage feed circuit of the IP cluster harness
connector (pin 8 of B-24) and a known good
ground.
4. Turn ON the ignition, with the engine OFF.
Does the test lamp illuminate? —
Go to Step 9 Go to Step 14
9 1. Test the control circuit between the ECM (pin
57 of C-58) and the IP cluster (pin 38 of B-23)
for an open circuit or high resistance.
2. Repair the circuit(s) as necessary.
Did you find and correct the condition? —
Go to Step 17 Go to Step 10
10 1. Inspect for an intermittent and for poor
connections at the harness connector of the
IP cluster (pin 8 of B-24 and pin 38 of B-23).
2. Repair the connection(s) as necessary.
Did you find and correct the condition? —
Go to Step 17 Go to Step 15
11 1. Inspect for an intermittent and for a poor
connection at the harness connector of the
ECM (pin 57 of C-58).
2. Repair the connection(s) as necessary.
Did you find and correct the condition? —
Go to Step 17 Go to Step 16
12 Repair the short to ground between the ECM (pin
57 of C-58) and the IP cluster (pin 38 of B-23).
Did you complete the repair? —
Go to Step 17
—
13Repair the short to battery or ignition voltage
between the ECM (pin 57 of C-58) and the IP
cluster (pin 38 of B-23).
Did you complete the repair? —
Go to Step 17
—
14Repair the open circuit or high resistance on the
ignition voltage feed circuit between the Meter
(10A) fuse and the IP cluster (pin 8 of B-24).
Did you complete the repair? —
Go to Step 17
—
15Repair or replace the IP cluster.
Did you complete the repair or replacement? —
Go to Step 17—
Step Action Value(s)Yes No

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