2007 ISUZU KB P190 Workshop Repair Manual

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Page 1745 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 6E-128 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
DTC P0201, P0202, P0203 or P0204 (Flash Code 271, 272, 273 or 274)
Circuit Description
The ECM calculates the optimum fuel injection ON time
using data sen

6E-128 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
DTC P0201, P0202, P0203 or P0204 (Flash Code 271, 272, 273 or 274)
Circuit Description
The ECM calculates the optimum fuel injection ON time
using data sent from various engine sensors. The ECM
supplies a high voltage along with grounding the fuel
injector control circuit when it needs to energize the fuel
injector (turn it ON). If the fuel injector charge voltage
circuit or solenoid control circuit is open circuit, this
DTC will set. DTC P0201 - P0204 will set depending
upon which cylinder injector circuit failed.
Condition for Running the DTC • DTCs P2146, P2147 and P2148 are not set. (DTC P0201 or P0204)
• DTCs P2149, P2150 and P2151 are not set. (DTC P0203 or P0204)
• The battery voltage is more than 9 volts.
• The ignition switch is ON.
• The engine is running.
• The engine speed is lower than 2000RPM.
Condition for Setting the DTC • The ECM detects an open circuit on the fuel injector solenoid circuits. 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.
Notice: • Each DTC agrees with engine cylinder order.
- P0201: Cylinder #1
- P0202: Cylinder #2
- P0203: Cylinder #3
- P0204: Cylinder #4
Schematic Reference: Engine Controls Schematics
Connector End View Reference: Engine Controls
Connector End Views or ECM Connector End Views
Circuit/ System Testing DTC P0201
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 cylinder #1 fuel injector harness connector.
3. Inspect for an intermittent and for poor connections at the harness connector (pins 1
and 2 of E-13).
4. Repair the connection(s) as necessary.
Did you find and correct the condition? —
Go to Step 11 Go to Step 4
4 Measure the resistance of cylinder #1 fuel injector
solenoid.
Is the resistance less the specified value? 2.0
Ω
Go to Step 5 Go to Step 9

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Page 1746 of 6020

ISUZU KB P190 2007 Workshop Repair Manual ENGINE CONTROL SYSTEM (4JK1/4JJ1) 6E-129
51. Disconnect the cylinder #4 fuel injector
harness connector.
2. Measure the resistance of the charge voltage circuit between the cylinder #1 and #4 fuel

ENGINE CONTROL SYSTEM (4JK1/4JJ1) 6E-129
51. Disconnect the cylinder #4 fuel injector
harness connector.
2. Measure the resistance of the charge voltage circuit between the cylinder #1 and #4 fuel
injector (pin 2 of E-13 and pin 2 of E-16).
Is the resistance less than the specified value? 1.0
Ω
Go to Step 6 Go to Step 7
6 1. Test the control circuit between the ECM (pin
33 of E-90) and the cylinder #1 fuel injector
(pin 1 of E-13) for an open circuit or high
resistance.
2. Repair the circuit(s) as necessary.
Did you find and correct the condition? —
Go to Step 11 Go to Step 8
7 1. Test the charge voltage circuit between the
ECM (pin 52 of E-90) and the cylinder #1 fuel
injector (pin 2 of E-13) for an open circuit or
high resistance.
2. Repair the circuit(s) as necessary.
Did you find and correct the condition? —
Go to Step 11 Go to Step 8
8 1. Turn OFF the ignition.
2. Disconnect the ECM harness connector.
3. Inspect for an intermittent and for poor connections at the harness connector of the
ECM (pins 33 and 52 of E-90).
4. Repair the connection(s) as necessary.
Did you find and correct the condition? —
Go to Step 11 Go to Step 10
9 Important:
Replacement fuel injector must be
programmed.
Replace the cylinder #1 fuel injector. Refer to Fuel
Injector Replacement/ Fuel Injector ID Code Data
Programming.
Did you complete the replacement? —
Go to Step 11
—
10Important:
Replacement ECM must be
programmed and learned.
Replace the ECM. Refer to ECM Replacement.
Did you complete the replacement? —
Go to Step 11
—
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

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Page 1747 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 6E-130 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
Circuit/ System Testing DTC P0202
StepAction Value(s)Yes No
1 Did you perform the Diagnostic System Check -
Engine Controls? —
Go to Step 2 Go to Diagnost

6E-130 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
Circuit/ System Testing DTC P0202
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. 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 cylinder #2 fuel injector harness connector.
3. Inspect for an intermittent and for poor connections at the harness connector (pins 1
and 2 of E-14).
4. Repair the connection(s) as necessary.
Did you find and correct the condition? —
Go to Step 11 Go to Step 4
4 Measure the resistance of cylinder #2 fuel injector
solenoid.
Is the resistance less the specified value? 2.0
Ω
Go to Step 5 Go to Step 9
5 1. Disconnect the cylinder #3 fuel injector
harness connector.
2. Measure the resistance of the charge voltage circuit between the cylinder #2 and #3 fuel
injector (pin 2 of E-14 and pin 2 of E-15).
Is the resistance less than the specified value? 1.0
Ω
Go to Step 6 Go to Step 7
6 1. Test the control circuit between the ECM (pin
24 of E-90) and the cylinder #2 fuel injector
(pin 1 of E-14) for an open circuit or high
resistance.
2. Repair the circuit(s) as necessary.
Did you find and correct the condition? —
Go to Step 11 Go to Step 8
7 1. Test the charge voltage circuit between the
ECM (pin 71 of E-90) and the cylinder #2 fuel
injector (pin 2 of E-14) for an open circuit or
high resistance.
2. Repair the circuit(s) as necessary.
Did you find and correct the condition? —
Go to Step 11 Go to Step 8
8 1. Turn OFF the ignition.
2. Disconnect the ECM harness connector.
3. Inspect for an intermittent and for poor connections at the harness connector of the
ECM (pins 24 and 71 of E-90).
4. Repair the connection(s) as necessary.
Did you find and correct the condition? —
Go to Step 11 Go to Step 10
9 Important:
Replacement fuel injector must be
programmed.
Replace the cylinder #2 fuel injector. Refer to Fuel
Injector Replacement/ Fuel Injector ID Code Data
Programming.
Did you complete the replacement? —
Go to Step 11
—

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Page 1748 of 6020

ISUZU KB P190 2007 Workshop Repair Manual ENGINE CONTROL SYSTEM (4JK1/4JJ1) 6E-131
Circuit/ System Testing DTC P0203
10Important:
Replacement ECM must be
programmed and learned.
Replace the ECM. Refer to ECM Replacement.
Did you complete

Page 1749 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 6E-132 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
Circuit/ System Testing DTC P0204
61. Test the control circuit between the ECM (pin
25 of E-90) and the cylinder #3 fuel injector
(pin 1 of E-15) for an ope

6E-132 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
Circuit/ System Testing DTC P0204
61. Test the control circuit between the ECM (pin
25 of E-90) and the cylinder #3 fuel injector
(pin 1 of E-15) for an open circuit or high
resistance.
2. Repair the circuit(s) as necessary.
Did you find and correct the condition? —
Go to Step 11 Go to Step 8
7 1. Test the charge voltage circuit between the
ECM (pin 51 of E-90) and the cylinder #3 fuel
injector (pin 2 of E-15) for an open circuit or
high resistance.
2. Repair the circuit(s) as necessary.
Did you find and correct the condition? —
Go to Step 11 Go to Step 8
8 1. Turn OFF the ignition.
2. Disconnect the ECM harness connector.
3. Inspect for an intermittent and for poor connections at the harness connector of the
ECM (pins 25 and 51 of E-90).
4. Repair the connection(s) as necessary.
Did you find and correct the condition? —
Go to Step 11 Go to Step 10
9 Important:
Replacement fuel injector must be
programmed.
Replace the cylinder #3 fuel injector. Refer to Fuel
Injector Replacement/ Fuel Injector ID Code Data
Programming.
Did you complete the replacement? —
Go to Step 11
—
10Important:
Replacement ECM must be
programmed and learned.
Replace the ECM. Refer to ECM Replacement.
Did you complete the replacement? —
Go to Step 11
—
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
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

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Page 1750 of 6020

ISUZU KB P190 2007 Workshop Repair Manual ENGINE CONTROL SYSTEM (4JK1/4JJ1) 6E-133
21. 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

ENGINE CONTROL SYSTEM (4JK1/4JJ1) 6E-133
21. 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 cylinder #4 fuel injector harness connector.
3. Inspect for an intermittent and for poor connections at the harness connector (pins 1
and 2 of E-16).
4. Repair the connection(s) as necessary.
Did you find and correct the condition? —
Go to Step 11 Go to Step 4
4 Measure the resistance of cylinder #4 fuel injector
solenoid.
Is the resistance less the specified value? 2.0
Ω
Go to Step 5 Go to Step 9
5 1. Disconnect the cylinder #1 fuel injector
harness connector.
2. Measure the resistance of the charge voltage circuit between the cylinder #1 and #4 fuel
injector (pin 2 of E-13 and pin 2 of E-16).
Is the resistance less than the specified value? 1.0
Ω
Go to Step 6 Go to Step 7
6 1. Test the control circuit between the ECM (pin
53 of E-90) and the cylinder #4 fuel injector
(pin 1 of E-16) for an open circuit or high
resistance.
2. Repair the circuit(s) as necessary.
Did you find and correct the condition? —
Go to Step 11 Go to Step 8
7 1. Test the charge voltage circuit between the
ECM (pin 72 of E-90) and the cylinder #4 fuel
injector (pin 2 of E-16) for an open circuit or
high resistance.
2. Repair the circuit(s) as necessary.
Did you find and correct the condition? —
Go to Step 11 Go to Step 8
8 1. Turn OFF the ignition.
2. Disconnect the ECM harness connector.
3. Inspect for an intermittent and for poor connections at the harness connector of the
ECM (pins 53 and 72 of E-90).
4. Repair the connection(s) as necessary.
Did you find and correct the condition? —
Go to Step 11 Go to Step 10
9 Important:
Replacement fuel injector must be
programmed.
Replace the cylinder #4 fuel injector. Refer to Fuel
Injector Replacement/ Fuel Injector ID Code Data
Programming.
Did you complete the replacement? —
Go to Step 11
—
10Important:
Replacement ECM must be
programmed and learned.
Replace the ECM. Refer to ECM Replacement.
Did you complete the replacement? —
Go to Step 11
—
Step Action Value(s)Yes No

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Page 1751 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 6E-134 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

Page 1752 of 6020

ISUZU KB P190 2007 Workshop Repair Manual ENGINE CONTROL SYSTEM (4JK1/4JJ1) 6E-135
DTC P0217 (Flash Code 542)
Circuit Description
The engine coolant temperature (ECT) sensor is
installed to the thermostat housing. The ECT sensor is
a vari

ENGINE CONTROL SYSTEM (4JK1/4JJ1) 6E-135
DTC P0217 (Flash Code 542)
Circuit Description
The engine coolant temperature (ECT) sensor is
installed to the thermostat housing. The ECT sensor is
a variable resistor and it measures the temperature of
the engine coolant. If the ECM detects an excessive
high coolant temperature, this DTC will set.
Condition for Running the DTC • DTCs P0116, P0117 and P0118 are not set.
• 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 engine coolant temperature is more than 110 °C (230 °F) for 5
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. Condition for Clearing the DTC
• Refer to DTC Type Definitions for Condition for Clearing the DTC - Type D.
Diagnostic Aids • After starting the engine, the ECT should rise steadily to about 80 to 85 °C (176 to 185 °F) then
stabilize when the thermostat opens.
• Use the Temperature vs. Resistance table to test the ECT sensor at various temperature levels to
evaluate the possibility of a skewed sensor. A
skewed sensor could result in poor driveability
concerns.
• The Total Engine Coolant Overtemperature Events parameter on scan tool indicates number of
overheat events.
Notice: • This DTC is caused by an engine overheat condition (e.g. low engine coolant level). Since this
DTC does not illuminate any lamps, clear the DTC
and ensure there are no signs of engine damage.
Excessive engine overheat may damage internal
engine components.
Circuit/ System Testing DTC P0217
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 P0117 also set? —
Go to DTC P0117 Go to Step 3
3 1. Test the engine cooling system for the
following condition. Refer to diagnosis of the
engine cooling system section for testing.
• Engine coolant level
• Engine coolant leakage
• Cooling fan belt slippage
• Cooling fan clutch working
• Thermostat working
• Water pump working
• Radiator clogging
2. Repair or replace as necessary.
Did you find and correct the condition? —
Go to Step 7 Go to Step 4
4 Start the engine and wait until engine is fully warm
upped while observing the Coolant Temperature
parameter with a scan tool.
Does the scan tool indicate more than the specified
value? 11 0
°C (230 °F)
Go to Step 6 Go to Step 5

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