Jeep XJ. Manual — part 893
TEST
ACTION
APPLICABILITY
2
When monitored: Continually while the vehicle is at high vehicle speeds and higher
engine load conditions.
When set: The gear ratio is incorrect for the current gear requested. The vehicle must
be driven on the road to set the DTC. This DTC will not set on the hoist.
This is the When monitored / When set conditions for DTC P0756.
All
Continue
3
With the DRBIII
t, erase DTC’s.
Test drive the vehicle.
Maintain a steady speed of 55 MPH for 30 seconds.
Bring the vehicle slowly to a complete stop.
NOTE: Check shift patterns while the vehicle is upshifting and downshift-
ing.
Did the transmission hang in 1st gear or launch in 4th gear during the test drive?
All
Yes
→
No
→
4
With the DRBIII
t, read TCM DTC’s.
Is the P0122 TCM TPS DTC present?
All
Yes
→
Refer to the Transmission category and perform the appropriate
TCM Throttle Position DTC diagnostic before continuing.
Perform AW4 TRANS VERIFICATION TEST-VER1.
No
→
5
With the DRBIII
t, read PCM DTC’s.
Are there any PCM TPS DTC’s present?
All
Yes
→
Refer to the Driveability category and perform all the appropriate
PCM Throttle Position DTC’s diagnostic’s before continuing.
Perform AW4 TRANS VERIFICATION TEST-VER1.
No
→
6
With the DRBIII
t, read TCM DTC’s.
Is the DTC P1746 and/or P1747 present?
All
Yes
→
If P1746 or P1747 are present refer to the transmission category
and perform the appropriate symptom. If both DTC’s are present
perform test P1747 first. If the problem is still present, perform
the diagnostic test P1746.
Perform AW4 TRANS VERIFICATION TEST-VER1.
No
→
7
Turn ignition off to the lock position.
Remove the transmission oil pan per the service information.
Inspect the pan and fluid for excessive debris or friction material.
Is the oil burnt and/or does the pan contain excessive debris or friction material.
All
Yes
→
Repair internal transmission problem.
Perform AW4 TRANS VERIFICATION TEST-VER1.
No
→
41
TRANSMISSION
P0756-SOLENOID B FUNCTIONAL FAULT —
Continued
TEST
ACTION
APPLICABILITY
8
Turn ignition off to the lock position.
Replace Solenoid B.
With the DRBIII
t, erase DTC’s.
Test drive the vehicle, maintain a steady speed of 55 MPH for at least 30 seconds.
Slowly come to a complete stop.
NOTE: Check the shift patterns while the vehicle is upshifting and down-
shifting.
Is the problem repaired?
All
Yes
→
Test Complete.
No
→
Repair internal transmission problem as necessary.
Perform AW4 TRANS VERIFICATION TEST-VER1.
9
Using the when monitored / when set conditions, attempt to reset the DTC. If the
DTC can be reset return to the symptom list and perform the appropriate diagnostic
test.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
NOTE: Check the Technical Service Bulletins.
Were any problems found?
All
Yes
→
Repair the wiring and/or connectors as necessary.
Perform AW4 TRANS VERIFICATION TEST-VER1.
No
→
Test Complete.
42
TRANSMISSION
P0756-SOLENOID B FUNCTIONAL FAULT —
Continued
Symptom:
P1694-CCD MESSAGE FROM JTEC FAILURE
When Monitored and Set Condition:
P1694-CCD MESSAGE FROM JTEC FAILURE
When Monitored:
Continuously with the key on.
Set Condition:
No CCD bus messages or invalid CCD bus messages are received from the
PCM for 20 seconds.
POSSIBLE CAUSES
INTERMITTENT WIRING AND/OR CONNECTORS
CCD BUS (+) CIRCUIT OPEN TO PCM
CCD BUS (-) CIRCUIT OPEN TO PCM
TCM - CCD BUS OPEN
TEST
ACTION
APPLICABILITY
1
When monitored: Continuously with the ignition key on.
When set: No CCD bus messages or invalid CCD bus messages are received from the
PCM for 20 seconds.
This is the When monitored / When set conditions for DTC P1694.
All
Continue
2
With the DRBIII
t, erase DTC’s.
Start the engine.
Allow the engine to idle for 2 minutes.
With the DRBIII
t, read DTC’s.
Did the DTC P1694 NO CCD MESSAGE FROM PCM return?
All
Yes
→
No
→
3
Turn ignition off to the lock position.
Disconnect the PCM harness connector(s).
Disconnect the TCM harness connector.
NOTE: Check connectors - Clean/repair as necessary.
Measure the resistance of the CCD Bus (+) circuit between the PCM harness
connector and the TCM harness connector.
Is the resistance below 5.0 ohms?
All
Yes
→
No
→
Repair the CCD Bus (+) circuit for an open.
Perform AW4 TRANS VERIFICATION TEST-VER1.
43
TRANSMISSION
TEST
ACTION
APPLICABILITY
4
Turn ignition off to the lock position.
Disconnect the PCM harness connector(s).
Disconnect the TCM harness connector.
NOTE: Check connectors - Clean/repair as necessary.
Measure the resistance of the CCD Bus (-) circuit between the PCM harness
connector and the TCM harness connector.
Is the resistance below 5.0 ohms?
All
Yes
→
No
→
Repair the CCD Bus (-) circuit for an open.
Perform AW4 TRANS VERIFICATION TEST-VER1.
5
If there are no possible causes remaining, view repair.
All
Repair
Replace the TCM.
Perform AW4 TRANS VERIFICATION TEST-VER1.
6
Using the when monitored / when set conditions, attempt to reset the DTC. If the
DTC can be reset return to the symptom list and perform the appropriate diagnostic
test.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
NOTE: Check the Technical Service Bulletins.
Were any problems found?
All
Yes
→
Repair the wiring and/or connectors as necessary.
Perform AW4 TRANS VERIFICATION TEST-VER1.
No
→
Test Complete.
44
TRANSMISSION
P1694-CCD MESSAGE FROM JTEC FAILURE —
Continued
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