Engine Control System (4HK1) 1A-269
DTC P2146 or P2149 (Flash Code 158 or 159)
Circuit Description
The ECM calculates the optimum fuel injection ON time
using data sent from various engine sensors. The
common 1 and 2 fuel injector charge voltage circuits
are high-voltage supply, which drives fuel injectors for
each cylinder in conjunction with the ECM grounding
the fuel injector solenoid control circuit. The common 1
covers fuel injectors in cylinders #1 and #4, and the
common 2 covers fuel injectors in cylinders #2 and #3.
If the common 1 or 2 fuel injector charge voltage circuit
is open circuit, shorted to ground or shorted to voltage
circuit, DTC P2146 or P2149 will set depending upon
which bank injector common circuit failed. If the fuel
injector solenoid control circuit is shorted to ground,
this DTC will also set.
Condition for Running the DTC
• DTCs P0201 and P0204 are not set. (DTC P2146)
• DTCs P0202 and P0203 are not set. (DTC P2149)
• The battery voltage is between 18 to 32 volts.
• The ignition switch is ON.
• The engine is running.
Condition for Setting the DTC
• The ECM detects that the common 1 fuel injector
charge voltage circuit is open circuit, shorted to
ground or shorted to voltage circuit, or cylinder #1
or #4 fuel injector solenoid coil control circuit is
shorted to ground. (DTC P2146)
• The ECM detects that the common 2 fuel injector
charge voltage circuit is open circuit, shorted to
ground or shorted to voltage circuit, or cylinder #2
or #3 fuel injector solenoid coil control circuit is
shorted to ground. (DTC P2149)
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.
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 P2146
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 in-line harness connector from
the cylinder head cover case.
3.
Turn ON the ignition, with the engine OFF.
4.
Connect a DMM between the cylinder #1 or #4
solenoid control circuit female side) and a
known good ground.
Is the DMM voltage more than the specified
value?
12.0 volts
Go to Step 4
Go to Step 6
4
Connect a test lamp between the charge voltage
circuit and a known good ground.
Does the test lamp illuminate?
—
Go to Step 7
Go to Step 5
LG4HKED-WE-0871.book 269
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