2007 ISUZU KB P190 ECO mode

6E-284 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
Circuit/ System Testing DTC P2147
StepAction 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 1. Turn OFF the ignition.
2. Disconnect the cylinder #1 and #4 fuel injector harness connector.
3. Disconnect the ECM harness connector.
4. Measure continuity between each fuel injector circuit and a known good ground.
• #1 (pins 1 and 2 of E-13) and a known good ground
• #4 (pins 1 and 2 of E-16) and a known good ground
5. Repair the short to ground if continuity exists for any measurement.
Did you find and correct the condition? —
Go to Step 7 Go to Step 4
4 Measure insulation resistance of the cylinder #1
and #4 fuel injector between each fuel injector
terminal and a known good ground.
Is the resistance more than the specified value? 1M
Ω
Go to Step 6 Go to Step 5
5 Important:
Replacement fuel injector must be
programmed.
Replace the appropriate fuel injector that was less
insulation resistance found at step 4.
Refer to Fuel Injector Replacement/ Fuel Injector
ID Code Data Programming.
Did you complete the 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
—
71. Reconnect all previously disconnected
harness connector(s).
2. Clear the DTCs with a scan tool.
3. Turn OFF the ignition for 30 seconds.
4. Turn ON the ignition, with the engineOFF.
5. 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 8
8 Observe the DTC Information with a scan tool.
Are there any DTCs that you have not diagnosed? —
Go to DTC List System OK

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

ENGINE CONTROL SYSTEM (4JK1/4JJ1) 6E-285
Circuit/ System Testing DTC P2148
StepAction 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 1. Turn OFF the ignition.
2. Disconnect the cylinder #1 and #4 fuel injector harness connector.
3. Turn ON the ignition, with the engine OFF.
4. Connect a test lamp between each fuel injector circuit and a known good ground.
• #1 (pins 1 and 2 of E-13) and a known good ground
• #4 (pins 1 and 2 of E-16) and a known good ground
5. Repair the short to battery or ignition voltage if the test lamp illuminates.
Did you find and correct the condition? —
Go to Step 5 Go to Step 4
4 Important:
Replacement ECM must be
programmed and learned.
Replace the ECM. Refer to ECM Replacement.
Did you complete the replacement? —
Go to Step 5
—
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. Turn ON the ignition, with the engineOFF.
5. 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 6
6 Observe the DTC Information with a scan tool.
Are there any DTCs that you have not diagnosed? —
Go to DTC List System OK

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

6E-286 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
DTC P2149, P2150 or P2151 (Flash Code 159)
Circuit Description
The ECM calculates the optimum fuel injection ON time
using data sent from various engine sensors. The
common 2 fuel injector charge voltage circuit is a high-
voltage supply which drives fuel injectors for cylinder #2
and #3 in conjunction with the ECM grounding the fuel
injector solenoid control circuit. If the common 2 fuel
injector charge voltage circuit is shorted to cylinder #2
or #3 fuel injector solenoid control circuit, shorted to
ground or shorted voltage circuit DTC P2149, P2150 or
P2151 will set. If the cylinder #2 and #3 fuel injector
solenoid control circuit is shorted each other, shorted to
ground or shorted voltage circuit DTC P2149, P2150 or
P2151 will also set.
Condition for Running the DTC • DTCs P0202, P0203, P2150 and P2151 are not set. (DTC P2149)
• The battery voltage is more than 9 volts.
• The ignition switch is ON.
• The engine is running.
Condition for Setting the DTC • The ECM detects that the common 2 fuel injector charge voltage circuit is shored to cylinder #2 or #3
fuel injector solenoid control circuit, or cylinder #2
and #3 fuel injector solenoid control circuit is
shorted each other. (DTC P2149). • The ECM detects that the common 2 fuel injector
charge voltage circuit, or cylinder #2 or #3 fuel
injector solenoid control circuit is shorted to
ground. (DTC P2150)
• The ECM detects that the common 2 fuel injector charge voltage circuit, or cylinder #2 or #3 fuel
injector solenoid control circuit is shorted to
voltage circuit. (DTC P2151)
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 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.
Schematic Reference: Engine Controls Schematics
Connector End View Reference: Engine Controls
Connector End Views or ECM Connector End Views
Circuit/ System Testing DTC P2149
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. Accelerate the engine and keep the accelerator pedal at any position.
5. Monitor the DTC Information with a scan tool.
Does the DTC fail this ignition? —
Go to Step 3 Go to Diagnostic
Aids

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

ENGINE CONTROL SYSTEM (4JK1/4JJ1) 6E-287
31. Turn OFF the ignition.
2. Disconnect the cylinder #2 and #3 fuel injector harness connector.
3. Disconnect the ECM harness connector.
4. Measure continuity through the fuel injector harness connector(s).
• Each #2 fuel injector circuit (pins 1 and 2 of E-14)
• Each #3 fuel injector circuit (pins 1and 2 of E-15)
• #2 and #3 solenoid control circuits (pin 1 of E-14 and pin 1 of E-15)
• #2 solenoid control circuit (pin 1 of E-14) and #3 charge voltage circuit (pin 2 of E-
15)
• #2 charge voltage circuit (pin 2 of E-14) and #3 solenoid control circuit (pin 1 of E-
15)
5. Repair the short circuit if continuity exists for any measurement.
Did you find and correct the condition? —
Go to Step 7 Go to Step 4
4 Measure the resistance of cylinder #2 and #3 fuel
injector solenoid.
Is the resistance less than the specified value? 0.5
Ω
Go to Step 6 Go to Step 5
5 Important:
Replacement fuel injector must be
programmed.
Replace the appropriate fuel injector that was less
solenoid resistance found at Step 4. Refer to Fuel
Injector Replacement/ Fuel Injector ID Code Data
Programming.
Did you complete the 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
—
71. 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 engine.
5. 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 8
8 Observe the DTC Information with a scan tool.
Are there any DTCs that you have not diagnosed? —
Go to DTC List System OK
Step
Action Value(s)Yes No

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

6E-288 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
Circuit/ System Testing DTC P2150
StepAction 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 1. Turn OFF the ignition.
2. Disconnect the cylinder #2 and #3 fuel injector harness connector.
3. Disconnect the ECM harness connector.
4. Measure continuity between each fuel injector circuit and a known good ground.
• #2 (pins 1 and 2 of E-14) and a known good ground
• #3 (pins 1 and 2 of E-15) and a known good ground
5. Repair the short to ground if continuity exists for any measurement.
Did you find and correct the condition? —
Go to Step 7 Go to Step 4
4 Measure insulation resistance of the cylinder #2
and #3 fuel injector between each fuel injector
terminal and a known good ground.
Is the resistance more than the specified value? 1M
Ω
Go to Step 6 Go to Step 5
5 Important:
Replacement fuel injector must be
programmed.
Replace the appropriate fuel injector that was less
insulation resistance found at Step 4. Refer to Fuel
Injector Replacement/ Fuel Injector ID Code Data
Programming.
Did you complete the 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
—
71. Reconnect all previously disconnected
harness connector(s).
2. Clear the DTCs with a scan tool.
3. Turn OFF the ignition for 30 seconds.
4. Turn ON the ignition, with the engineOFF.
5. 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 8
8 Observe the DTC Information with a scan tool.
Are there any DTCs that you have not diagnosed? —
Go to DTC List System OK

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

ENGINE CONTROL SYSTEM (4JK1/4JJ1) 6E-289
Circuit/ System Testing DTC P2151
StepAction 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 1. Turn OFF the ignition.
2. Disconnect the cylinder #2 and #3 fuel injector harness connector.
3. Turn ON the ignition, with the engine OFF.
4. Connect a test lamp between each fuel injector circuit and a known good ground.
• #2 (pins 1 and 2 of E-14) and a known good ground
• #3 (pins 1 and 2 of E-15) and a known good ground
5. Repair the short to battery or ignition voltage if the test lamp illuminates.
Did you find and correct the condition? —
Go to Step 5 Go to Step 4
4 Important:
Replacement ECM must be
programmed and learned.
Replace the ECM. Refer to ECM Replacement.
Did you complete the replacement? —
Go to Step 5
—
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. Turn ON the ignition, with the engineOFF.
5. 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 6
6 Observe the DTC Information with a scan tool.
Are there any DTCs that you have not diagnosed? —
Go to DTC List System OK

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

6E-290 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
DTC P2227 (Flash Code 71)
Circuit Description
The barometric pressure (BARO) sensor is located on
the intake manifold. The BARO sensor is a transducer
that varies voltage according to changes the barometric
pressure. Within the ECM, the diagnostic compares the
BARO sensor input to the boost pressure sensor input.
If the ECM detects that the inputs are not within a
specified amount of each other, this DTC will set.
Condition for Running the DTC • DTCs P0101, P0102, P0103, P0107, P0108, P0116, P0117, P0118, P0122, P0123, P0500,
P0501, P0638, P0652, P0653, P0698, P0699,
P2100, P2101, P2103, P2228 and P2229 are not
set.
AND following conditions are met for longer than 3
seconds.
• The ignition switch is ON.
• The engine coolant temperature is more than 5 °C
(41 °F).
• The engine speed is less than 800 RPM.
• The fuel injection quantity is less than a predetermined value.
• The accelerator pedal is not depressed.
• The vehicle is not running.
• The engine run time is longer than 5 seconds. Condition for Setting the DTC
• The ECM detects that the differential pressure between the barometric pressure and the boost
pressure is more than 10 kPa (1.5 psi) for 10
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 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.
Schematic Reference: Engine Controls Schematics
Connector End View Reference: Engine Controls
Connector End Views or ECM Connector End Views
Circuit/ System Testing DTC P2227
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 P0107, P0108, P2228 or P2229 also set? —
Go to Applicable DTC Go to Step 3
3 1. Turn ON the ignition, with the engine OFF.
2. Compare the Boost Pressure parameter to the Barometric Pressure (BARO) parameter with
a scan tool.
Are both parameter within the range specified of
each other? 10 kPa (1.5
psi)
Go to Diagnostic Aids Go to Step 4
4 Determine the outside barometric pressure from
your location specified in the altitude vs barometric
pressure table. Refer to Altitude vs Barometric
Pressure.
Is the BARO parameter on the scan tool close to
the outside barometric pressure? —
Go to Step 5 Go to Step 7

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

6E-292 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
111. 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 engine.
5. 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 12
12 Observe the DTC Information with a scan tool.
Are there any DTCs that you have not diagnosed? —
Go to DTC List System OK
Step
Action Value(s)Yes No

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007