Jeep XJ. Manual — part 896
TEST
ACTION
APPLICABILITY
7
With the DRBIII
t, read TCM DTC’s.
Are DTC’s P1747 and P1749 present in addition to the P1745 DTC?
All
Yes
→
Repair the open or high resistance Transmission Case Ground.
Perform AW4 TRANS VERIFICATION TEST-VER1.
No
→
8
Turn ignition off to the lock position.
Remove the Transmission Oil Pan, refer to the Service Information.
Disconnect the Solenoid A harness connector.
NOTE: Check connectors - Clean/repair as necessary.
Turn the ignition on.
Measure the voltage of the Solenoid A Control circuit in the Solenoid A connector.
Is there any voltage present?
All
Yes
→
Repair the Solenoid A Control circuit for a short to voltage.
Perform AW4 TRANS VERIFICATION TEST-VER1.
No
→
9
Turn ignition off to the lock position.
Remove the Transmission Oil Pan, refer to the service information.
Disconnect the Solenoid A harness connector.
NOTE: Check connectors - Clean/repair as necessary.
Measure the resistance of Solenoid A from the solenoid mounting bracket to the
solenoid wire terminal.
Is the resistance between 11.0 and 15.0 ohms?
All
Yes
→
No
→
Replace Solenoid A.
Perform AW4 TRANS VERIFICATION TEST-VER1.
10
If there are no possible causes remaining, view repair.
All
Repair
Replace the TCM.
Perform AW4 TRANS VERIFICATION TEST-VER1.
11
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.
53
TRANSMISSION
P1745 SOLENOID A SHORTED TO VOLTAGE OR OPEN —
Continued
Symptom:
P1746-SOLENOID B SHORTED TO GROUND
When Monitored and Set Condition:
P1746-SOLENOID B SHORTED TO GROUND
When Monitored:
Continuously while in 1st or 2nd gear.
Set Condition:
Solenoid B is turned on and a low voltage is detected on the Solenoid B
Control circuit.
POSSIBLE CAUSES
INTERMITTENT WIRING AND/OR CONNECTORS
SHORT TO GROUND BETWEEN THE 8-WAY CONNECTOR AND THE TCM CONNECTOR
SHORT TO GROUND BETWEEN THE 8-WAY CONNECTOR AND THE SOLENOID B CONNEC-
TOR
SOLENOID B - RESISTANCE OUT OF RANGE
TCM - SOLENOID B CONTROL CIRCUIT
TEST
ACTION
APPLICABILITY
1
NOTE: Always perform diagnostics with a fully charged battery to avoid
diagnosing false symptoms.
NOTE: Low fluid level can be the cause of many transmission problems. If
the fluid level is low locate and repair the leak then check and adjust the
fluid level per the service information.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
Repair as necessary.
Verify the brake switch input to the TCM is working correctly.
Perform the shift lever position test and adjust the linkage if necessary.
Test drive vehicle to verify customer complaint.
With the DRBIII
t, read the PCM DTC’s. Check and repair all PCM DTC’s before
performing transmission diagnostics.
With the DRBIII
t, read the TCM DTC’s.
Note: Check 1 trip failures and diagnose them as DTC’s (Hard codes)
Most DTC’s set on start up but some must be set by driving the vehicle such that all
diagnostic monitors have run.
Note: Verify flash level of transmission controller. Some problems are
corrected by software upgrades to the transmission controller.
NOTE: Check for applicable TSB’s related to the problem.
Perform this procedure prior to symptom diagnosis.
All
Continue
2
When monitored: Continuously while in 1st or 2nd gear.
When set: Solenoid B is turned on and a low voltage is detected on the Solenoid B
Control circuit.
This is the When monitored / When set conditions for DTC P1746.
All
Continue
54
TRANSMISSION
TEST
ACTION
APPLICABILITY
3
With the DRBIII
t, erase DTC’s.
NOTE: The vehicle must be driven on the road for the next step.
Place the gear selector in the 3 range.
Accelerate the vehicle to 40 MPH and hold for 30 seconds.
Did the DTC P1746 reset?
All
Yes
→
No
→
4
Turn ignition off to the lock position.
Disconnect the TCM harness connector.
Disconnect the Transmission Solenoid 8-Way harness connector.
NOTE: Check connectors - Clean/repair as necessary.
Measure the resistance between ground and the Solenoid B Control circuit.
Is the resistance below 5.0 ohms?
All
Yes
→
Repair the Solenoid B Control circuit for a short to ground.
Perform AW4 TRANS VERIFICATION TEST-VER1.
No
→
5
Turn ignition off to the lock position.
Disconnect the Transmission Solenoid 8-Way harness connector.
Remove the Transmission Oil Pan, refer to the Service Information.
Disconnect the Solenoid B harness connector.
NOTE: Check connectors - Clean/repair as necessary.
Measure the resistance between ground and the Solenoid B Control circuit.
Is the resistance below 5.0 ohms?
All
Yes
→
Repair the Solenoid B Control circuit for a short to ground.
Perform AW4 TRANS VERIFICATION TEST-VER1.
No
→
6
Turn ignition off to the lock position.
Remove the Transmission Oil Pan, refer to the service information.
Disconnect the Solenoid B harness connector.
NOTE: Check connectors - Clean/repair as necessary.
Measure the resistance of Solenoid B from the solenoid mounting bracket to the
solenoid wire terminal.
Is the resistance between 11.0 and 15.0 ohms?
All
Yes
→
No
→
Replace Solenoid B.
Perform AW4 TRANS VERIFICATION TEST-VER1.
7
If there are no possible causes remaining, view repair.
All
Repair
Replace the TCM.
Perform AW4 TRANS VERIFICATION TEST-VER1.
55
TRANSMISSION
P1746-SOLENOID B SHORTED TO GROUND —
Continued
TEST
ACTION
APPLICABILITY
8
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.
56
TRANSMISSION
P1746-SOLENOID B SHORTED TO GROUND —
Continued
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