DTC P0201, P0202, P0203, or P0204 - LLU
Diagnostic Instructions
DTC Descriptors
DTC P0201 00: Cylinder 1 Injector Control
Circuit
DTC P0202 00: Cylinder 2 Injector Control
Circuit
DTC P0203 00: Cylinder 3 Injector Control
Circuit
DTC P0204 00: Cylinder 4 Injector Control
Circuit
Diagnostic Fault Information
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
Ignition Voltage
|
P0689 00
|
P0201 00**, P0202 00**, P0203 00**,
P0204 00**, P0689 00*
|
-
|
-
|
Injector 1 Control Circuit
|
P0201 00, P0300 00
|
P0201 00, P0300 00
|
P0201 00, P0300 00
|
-
|
Injector 2 Control Circuit
|
P0202 00, P0300 00
|
P0202 00, P0300 00
|
P0202 00, P0300 00
|
-
|
Injector 3 Control Circuit
|
P0203 00, P0300 00
|
P0203 00, P0300 00
|
P0203 00, P0300 00
|
-
|
Injector 4 Control Circuit
|
P0204 00, P0300 00
|
P0204 00, P0300 00
|
P0204 00, P0300 00
|
-
|
* Engine cranks but does not start. Open fuse, cranks no
start
** If the condition is between the injector and the splice.
|
Circuit/System Description
The control module enables the appropriate fuel injector pulse
for each cylinder. Ignition voltage is supplied to the fuel
injectors. The control module controls each fuel injector by
grounding the control circuit via a solid state device called a
driver. The control module monitors the status of each driver. If
the control module detects an incorrect voltage for the commanded
state of the driver, a fuel injector control circuit DTC sets.
Conditions for Running the DTC
• |
The battery voltage is greater than 9 V. |
• |
These DTCs run continuously when the above
conditions are met. |
Conditions for Setting the DTC
• |
The control module detects an incorrect voltage on
the fuel injector control circuit. |
• |
The above condition is met for 5 s. |
Action Taken When the DTC Sets
DTCsP0201 00, P0202 00, P0203 00, P0204 00
are Type B DTCs.
Conditions for Clearing the DTC
DTCsP0201 00, P0202 00, P0203 00, P0204 00,
are Type B DTCs.
Diagnostic Aids
• |
The MIL indicator flashes when there is an engine
misfire. |
• |
High resistance in the circuits of the injectors
may set a misfire DTC without setting an injector DTC. Test the
injector circuits of the affected cylinder(s) for a high resistance
if you suspect a condition. |
Reference Information
Schematic Reference
Engine Controls Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Fuel System Description
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 Testing
- Ignition OFF, disconnect the harness connector at the
appropriate Q17A Fuel Injector 1, Q17B Fuel
Injector 2, Q17C Fuel Injector 3, or Q17D Fuel
Injector 4.
- Ignition ON, verify that a test lamp illuminates
between the ignition circuit terminal 1 and ground.
⇒ |
If the test lamp does not illuminate, test the
ignition circuit for a short to ground or an open/high resistance.
If the circuit tests normal and the ignition circuit fuse is open,
test or replace the appropriate Q17 Fuel Injector. |
- Ignition OFF, connect a test lamp between the control
circuit terminal 2 and the ignition circuit terminal 1 of
Q17A Fuel Injector 1, Q17B Fuel Injector 2,
Q17C Fuel Injector 3, or Q17D Fuel
Injector 4.
- Engine cranking, the test lamp should flash.
⇒ |
If the test lamp is always ON, test the control
circuit for a short to ground. If the circuit tests normal, replace
the K20 Engine Control Module. |
⇒ |
If the test lamp is always OFF, test the control
circuit for a short to voltage or an open/high resistance. If the
circuit tests normal, replace the K20 Engine Control
Module. |
- If all circuits test normal, test or replace the
Q17A Fuel Injector 1, Q17B Fuel Injector 2,
Q17C Fuel Injector 3, or Q17D Fuel
Injector 4.
Component Testing
Static Test
- Ignition OFF, disconnect the harness connector at the
appropriate Q17A Fuel Injector 1, Q17B Fuel
Injector 2, Q17C Fuel Injector 3, or Q17D Fuel
Injector 4.
Note: The engine coolant
temperature (ECT) sensor must be between 10-32°C (50-90°F)
in order for an accurate measurement.
- Test for 11-14Ω between the ignition voltage
terminal A and the control terminal B.
⇒ |
If not within the specified range, replace the
Q17A Fuel Injector 1, Q17B Fuel Injector 2,
Q17C Fuel Injector 3, or Q17D Fuel
Injector 4. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
|