Jeep Grand Cherokee WK. Manual — part 1061
P1647-HYDRAULIC COOLING FAN CONTROL CIRCUIT HIGH (CONTINUED)
5.
FRONT CONTROL MODULE
NOTE: Before continuing, check the FCM harness connector terminals for corrosion, damage, or terminal
push out. Repair as necessary.
Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and
Ground circuits.
Were there any problems found?
Yes
>> Repair as necessary.
Perform BODY VERIFICATION TEST VER - 1.
No
>> Replace and program the Front Control Module per Service Information.
Perform BODY VERIFICATION TEST VER - 1.
9 - 840
ENGINE ELECTRICAL DIAGNOSTICS
WK
P1696-EEPROM MEMORY WRITE DENIED/INVALID
For the Engine circuit diagram (Refer to 9 - ENGINE - SCHEMATICS AND DIAGRAMS).
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
Continuously with the ignition on.
•
Set Condition:
An attempt to program/write to the internal EEPROM failed, Also checks at power down. One Trip Fault. Three
good trips to turn off the MIL.
Possible Causes
PCM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING).
Diagnostic Test
1.
SCAN TOOL DISPLAYS A WRITE FAILURE
With a scan tool, perform the SRI Memory Test.
Does scan tool display Write Failure?
Yes
>> Replace and program the Powertrain Control Module per Service Information.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Go To 2
2.
SCAN TOOL DISPLAYS A WRITE REFUSED
With the a scan tool, perform the SRI Memory Test.
Does the scan tool display Write Refused?
Yes
>> Go To 3
No
>> Go To 4
3.
PCM REFUSED 2ND TEST
With a scan tool, perform the SRI Memory Test a third time.
NOTE: Retest the SRI Memory two more times.
Does the scan tool display Write Refused again?
Yes
>> Replace and program the Powertrain Control Module per Service Information.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Test Complete.
4.
SCAN TOOL DISPLAYS SRI MILEAGE INVALID
With a scan tool, perform the SRI Memory Test.
Does the scan tool display SRI Mileage Invalid?
Yes
>> Update the mileage and retest the SRI Memory.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Go To 5
WK
ENGINE ELECTRICAL DIAGNOSTICS
9 - 841
P1696-EEPROM MEMORY WRITE DENIED/INVALID (CONTINUED)
5.
COMPARE SRI MILEAGE WITH ODOMETER
Compare the SRI Mileage stored with the Instrument Panel Odometer.
Is the mileage within the specified range displayed on the scan tool?
Yes
>> Test Complete.
No
>> Update the mileage and retest the SRI Memory.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
9 - 842
ENGINE ELECTRICAL DIAGNOSTICS
WK
P1697-EMR (SRI) MILEAGE NOT STORED
For the Engine circuit diagram (Refer to 9 - ENGINE - SCHEMATICS AND DIAGRAMS).
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
Continuously with the ignition on.
•
Set Condition:
An attempt to program/write to the internal EEPROM failed, Also checks at powerdown. One Trip Fault. Three
good trips to turn off the MIL.
Possible Causes
PCM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING).
Diagnostic Test
1.
SCAN TOOL DISPLAYS A WRITE FAILURE
With a scan tool, perform the SRI Memory Test.
Does scan tool display Write Failure?
Yes
>> Replace and program the Powertrain Control Module per Service Information.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Go To 2
2.
SCAN TOOL DISPLAYS A WRITE REFUSED
With the a scan tool, perform the SRI Memory Test.
Does the scan tool display Write Refused?
Yes
>> Go To 3
No
>> Go To 4
3.
PCM REFUSED 2ND TEST
With a scan tool, perform the SRI Memory Test a third time.
NOTE: Retest the SRI Memory two more times.
Does the scan tool display Write Refused again?
Yes
>> Replace and program the Powertrain Control Module per Service Information.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Test Complete.
4.
SCAN TOOL DISPLAYS SRI MILEAGE INVALID
With a scan tool, perform the SRI Memory Test.
Does the scan tool display SRI Mileage Invalid?
Yes
>> Update the mileage and retest the SRI Memory.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Go To 5
WK
ENGINE ELECTRICAL DIAGNOSTICS
9 - 843
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