Jeep XJ. Manual - part 614

TEST

ACTION

APPLICABILITY

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Yes

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Repair the Control Sleeve Position Sensor circuits that measured
below 100 kohms for a short together.
Perform ROAD TEST VERIFICATION - VER-2.

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Go To

Turn the ignition off.
Disconnect the Fuel Injection Pump harness connector.
Disconnect the ECM harness connectors.
Measure the resistance between ECM harness connector C2 cavity 56 and Fuel
Injection Pump harness connector cavity 1.
Measure the resistance between ECM harness connector C2 cavity 57 and Fuel
Injection Pump harness connector cavity 2.
Measure the resistance between ECM harness connector C2 cavity 58 and Fuel
Injection Pump harness connector cavity 3.
Is the resistance below 5.0 ohms for each of the measurements?

All

Yes

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Go To

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Repair the Control Sleeve Position Sensor circuit(s) that mea-
sured above 5.0 ohms for an open.
Perform ROAD TEST VERIFICATION - VER-2.

If there are no possible causes remaining, view repair.

All

Repair

Replace and program the Engine Control Module in accordance
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.

WARNING: KEEP CLEAR OF THE ENGINE’S MOVING PARTS.
NOTE: The conditions that set the DTC are not present at this time. The
following list may help in identifying the intermittent condition.
With the engine running at normal operating temperature, monitor the DRB
parameters related to the DTC while wiggling the wiring harness. Look for param-
eter values to change and/or a DTC to set.
Review the DTC When Monitored and Set Conditions. If possible, try to duplicate the
conditions under which the DTC was set.
Refer to any Technical Service Bulletins (TSB) that may apply.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Were any of the above conditions present?

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Yes

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Repair as necessary
Perform ROAD TEST VERIFICATION - VER-2.

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Test Complete.

108

DRIVEABILITY - DIESEL

P1225-CONTROL SLEEVE SENSOR SIGNAL HIGH EXCEEDED —

Continued

Symptom List:

P1225-CONTROL SLEEVE SENSOR START END POS. NOT AT-
TAINED
P1225-CONTROL SLEEVE SENSOR STOP END POS. NOT AT-
TAINED

Test Note:

All symptoms listed above are diagnosed using the same tests.

The title for the tests will be P1225-CONTROL SLEEVE SEN-
SOR START END POS. NOT ATTAINED.

When Monitored and Set Condition:

P1225-CONTROL SLEEVE SENSOR START END POS. NOT ATTAINED

When Monitored:

With the ignition on.

Set Condition:

The control sleeve sensor signal indicates the control sleeve did not reach

its start position.

P1225-CONTROL SLEEVE SENSOR STOP END POS. NOT ATTAINED

When Monitored:

With the ignition on.

Set Condition:

The control sleeve position sensor signal indicates the control sleeve is not

at its ending position.

POSSIBLE CAUSES

ENGINE CONTROL MODULE

REPLACE THE FUEL INJECTION PUMP

INTERMITTENT CONDITION

TEST

ACTION

APPLICABILITY

NOTE: If other Control Sleeve Position Sensor or Fuel Quantity Actuator
DTCs are present, diagnose the other DTCs before continuing.
Turn the ignition on.
With the DRB, erase ECM DTCs.
Perform several drive cycles, turning the ignition off for at least 10 seconds between
each drive cycle.
Monitor the DRB for ECM DTCs.
Did this DTC reset?

All

Yes

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Go To

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Go To

109

DRIVEABILITY - DIESEL

TEST

ACTION

APPLICABILITY

Replace the Fuel Injection Pump in accordance with the Service Information.
With the DRB, erase ECM DTCs.
Perform several drive cycles, turning the ignition off for at least 10 seconds between
each drive cycle.
Monitor the DRB for ECM DTCs.
Did this DTC reset?

All

Yes

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Replace and program the Engine Control Module in accordance
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.

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The repair is complete.
Perform ROAD TEST VERIFICATION - VER-2.

All

Yes

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Repair as necessary
Perform ROAD TEST VERIFICATION - VER-2.

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Test Complete.

110

DRIVEABILITY - DIESEL

P1225-CONTROL SLEEVE SENSOR START END POS. NOT ATTAINED —

Continued

Symptom:

P1230-TIMING GOVERNING NEGATIVE GOVERNOR DEVIATION

When Monitored and Set Condition:

P1230-TIMING GOVERNING NEGATIVE GOVERNOR DEVIATION

When Monitored:

With the engine speed between 1000 and 4800 RPM.

Set Condition:

The ECM detects 3 degrees of excess timing retard for at least 10 seconds.

POSSIBLE CAUSES

CHECK FOR OTHER DTCS

ENGINE CONTROL MODULE

REPLACE THE FUEL INJECTION PUMP

INTERMITTENT CONDITION

FUEL INJECTION PUMP TIMING INCORRECT

TEST

ACTION

APPLICABILITY

Turn the ignition on.
With the DRB, erase ECM DTCs.
Turn the ignition off, wait 30 seconds, then attempt to start the engine.
With the DRB, read ECM DTCs.
Did this DTC reset?

All

Yes

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Go To

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NOTE: This DTC will set due to noise on the Needle Movement Sensor
circuit.
Turn the ignition on.
With the DRB, check for additional DTCs.
Are other DTCs present?

All

Yes

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Refer to the Symptom List for diagnosis of the other DTCs before
continuing.
Perform ROAD TEST VERIFICATION - VER-2.

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Go To

Check the Fuel Injection Pump timing using the Service Information.
Is the Fuel Injection Pump timed correctly?

All

Yes

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Go To

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Reset the Fuel Injection Pump timing in accordance with the
Service Information.
Perform ROAD TEST VERIFICATION - VER-2.

111

DRIVEABILITY - DIESEL

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