DTC P0261, P0262, P0264, P0265, P0267, P0268, P0270, or
P0271
Diagnostic Instructions
DTC Descriptors
DTC P0261 00: Cylinder 1 Injector Control
Circuit Low Voltage |
DTC P0262 00: Cylinder 1 Injector Control
Circuit High Voltage |
DTC P0264 00: Cylinder 2 Injector Control
Circuit Low Voltage |
DTC P0265 00: Cylinder 2 Injector Control
Circuit High Voltage |
DTC P0267 00: Cylinder 3 Injector Control
Circuit Low Voltage |
DTC P0268 00: Cylinder 3 Injector Control
Circuit High Voltage |
DTC P0270 00: Cylinder 4 Injector Control
Circuit Low Voltage |
DTC P0271 00: Cylinder 4 Injector Control
Circuit High Voltage |
Diagnostic Fault Information
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
Fuel Injector Positive Voltage Control Group 1
|
—
|
P0201 00, P0204 00
|
—
|
—
|
Fuel Injector Positive Voltage Control Group 2
|
—
|
P0202 00, P0203 00
|
—
|
—
|
Fuel Injector 1 Control
|
P0261 00
|
P0201 00
|
P0262 00
|
—
|
Fuel Injector 2 Control
|
P0264 00
|
P0202 00
|
P0265 00
|
—
|
Fuel Injector 3 Control
|
P0267 00
|
P0203 00
|
P0268 00
|
—
|
Fuel Injector 4 Control
|
P0270 00
|
P0204 00
|
P0271 00
|
—
|
|
|
Circuit/System Description
The engine control module (ECM) supplies voltage to each fuel
injector on the injector positive voltage control circuits. The ECM
energizes each fuel injector by grounding the control circuit of
that fuel injector. The ECM monitors the status of the injector
positive voltage control circuits and the fuel injector control
circuits. The injectors are separated into the following two
groups:
• |
Group 1 – Injectors 1
and 4 |
• |
Group 2 – Injectors 2
and 3 |
When a fuel injector circuit condition is detected by the ECM,
the affected fuel injectors will be disabled and may disable the
affected group of fuel injectors.
Conditions for Running the DTC
• |
The ECM monitors for a
condition once per camshaft revolution. |
Conditions for Setting the DTC
The ECM detects that the commanded state of the driver and the
actual state of the control circuit do not match.
Action Taken When the DTC Sets
DTC P0261, P0262, P0264, P0265, P0267, P0268, P0270 and P0271
are Type A DTCs.
Conditions for Clearing the DTC
DTC P0261, P0262, P0264, P0265, P0267, P0268, P0270 and P0271
are Type A DTCs.
Reference Information
Schematic Reference
Engine Controls Schematics
Connector End View Reference
Component Connector End Views
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Operate the vehicle within the Conditions for Running the DTC to
verify the DTC does not reset. You may also operate the vehicle
within the conditions that are captured in the Freeze Frame/Failure
Records Data List.
Circuit/System Testing
1. |
Ignition OFF, disconnect the
harness connector at the appropriate fuel injector. |
2. |
Ignition ON, test for
5.8–7.8 V between the low control circuit terminal 2 and
ground. |
⇒ |
If less than the specified range, test the low
control circuit for an open/high resistance or for a short to
ground. If the circuit tests normal, replace the K20 Engine Control
Module. |
⇒ |
If greater than the specified range, test the low
control circuit for a short to voltage. If the circuit tests
normal, replace the K20 Engine Control Module. |
3. |
Ignition ON, connect a test
lamp between the affected fuel injector low control circuit
terminal 2 and ground. |
4. |
Engine cranking or running,
the test lamp should illuminate or flash. |
⇒ |
If the test lamp does not illuminate or flash
replace the K20 Engine Control Module. |
5. |
Ignition OFF, disconnect the
harness connector X1 at the K20 Engine Control Module. |
6. |
Ignition ON, test for less
than 0.3 V between the high control circuit terminal 1 and
ground. |
⇒ |
If greater than specified range, test the high
control circuit for a short to voltage. If the circuit tests
normal, replace the K20 Engine Control Module. |
7. |
Ignition OFF, test for greater
than 500 kΩ between the control circuit terminal 1 and
ground. |
⇒ |
If less than specified range, test the high
control circuit for a short to earth. If the circuit tests normal,
replace the K20 Engine Control Module. |
8. |
Test for less than 5 Ω
between the control circuit terminal 1 and corresponding terminal
of the injector. |
⇒ |
If greater than the specified range, test the high
control circuit for an open circuit. If the circuit tests normal,
replace the K20 Engine Control Module. |
9. |
If all circuits test normal,
test or replace the appropriate fuel injector. |
Component Testing
Static Test
1. |
Disconnect the harness
connector at the appropriate fuel injector. |
|
Note: The DMM and
test leads must be calibrated to 0 Ω in order to prevent
misdiagnosis.
|
2. |
Test for 0.05–0.30
Ω between the low control terminal 2 and the high control
terminal 1. |
⇒ |
If not within the specified range, replace the
fuel injector. |
3. |
Test for infinite resistance
between each terminal and ground. |
⇒ |
If not the specified value, replace the fuel
injector. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
|