Jeep XJ. Manual — part 889
TEST
ACTION
APPLICABILITY
19
Turn the ignition off.
Disconnect the TRS harness connector.
Disconnect the TCM harness connector.
NOTE: Check connectors - Clean/repair as necessary.
Turn the ignition on.
Measure the voltage of the TRS 1-2 Sense circuit in the TCM connector.
Is there any voltage present?
All
Yes
→
Repair the TRS 1-2 Sense circuit for a short to voltage.
Perform AW4 TRANS VERIFICATION TEST-VER1.
No
→
20
Turn the ignition off.
Disconnect the TRS harness connector.
NOTE: Check connectors - Clean/repair as necessary.
With the DRBIII
t in Inputs/Outputs, read the TRS state.
Connect a jumper wire to B(+).
Momentarily connect the other end of the jumper wire to each of the TRS Sense
circuit’s.
NOTE: The TRS switch state should display ON with the voltage applied.
Did all the TRS switch states indicate ON while 12 volts was applied?
All
Yes
→
No
→
Replace the TCM.
Perform AW4 TRANS VERIFICATION TEST-VER1.
21
If there are no possible causes remaining, view repair.
All
Repair
Replace the Transmission Range Sensor.
Perform AW4 TRANS VERIFICATION TEST-VER1.
25
TRANSMISSION
P0705-RANGE SENSOR —
Continued
Symptom:
P0715-INPUT SPEED SENSOR ERROR
When Monitored and Set Condition:
P0715-INPUT SPEED SENSOR ERROR
When Monitored:
Continuously while in 1st, 2nd, and 3rd gears with an Output Speed
Sensor signal present and vehicle speed is over 8 MPH.
Set Condition:
No signal from the Input Speed Sensor (ISS) with an Output Speed Sensor
signal present. The DTC will be set when the TCM verifies that there is no ISS for 1 second
in 2nd gear.
POSSIBLE CAUSES
INTERMITTENT WIRING AND/OR CONNECTORS
INPUT SPEED SENSOR GROUND CIRCUIT OPEN
INPUT SPEED SENSOR SIGNAL CIRCUIT OPEN
INPUT SPEED SENSOR GROUND CIRCUIT SHORT TO GROUND
INPUT SPEED SENSOR SIGNAL CIRCUIT SHORT TO GROUND
ISS SIGNAL CIRCUIT SHORTED TO ISS GROUND CIRCUIT
INPUT SPEED SENSOR GROUND CIRCUIT SHORT TO VOLTAGE
INPUT SPEED SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE
INPUT SPEED SENSOR - OUT OF RANGE
TCM-INPUT SPEED SENSOR
26
TRANSMISSION
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, 2nd, and 3rd gears with an Output
Speed Sensor signal present and vehicle speed is over 8 MPH.
When set: No signal from the Input Speed Sensor (ISS) with an Output Speed Sensor
signal present. The DTC will be set when the TCM verifies that there is no ISS for
1 second in 2nd gear.
This is the When monitored / When set conditions for DTC P0715.
All
Continue
3
Raise the Drive wheels off the ground.
CAUTION: Properly support the vehicle.
WARNING: BE SURE TO KEEP HANDS AND FEET CLEAR OF ROTATING
WHEELS.
With the DRBIII
t in Inputs/Outputs, read the Input Speed Sensor state.
Place the gear selector in the 1-2 position and let the wheels spin.
Is the Input Shaft speed above 0 RPM?
All
Yes
→
No
→
4
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.
27
TRANSMISSION
P0715-INPUT SPEED SENSOR ERROR —
Continued
TEST
ACTION
APPLICABILITY
5
Turn ignition switch to the lock position
Disconnect the TCM harness connector.
Disconnect the Input Speed Sensor harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Input Speed Sensor Ground circuit from the TCM
harness connector to the Input Speed Sensor harness connector.
Is the resistance above 5.0 ohms?
All
Yes
→
Repair the open Input Speed Sensor Ground circuit.
Perform AW4 TRANS VERIFICATION TEST-VER1.
No
→
6
Turn ignition switch to the lock position
Disconnect the TCM harness connector.
Disconnect the Input Speed Sensor harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Input Speed Sensor Signal circuit from the TCM
connector to the Input Speed Sensor connector.
Is the resistance above 5.0 ohms?
All
Yes
→
Repair open Input Speed Sensor Signal circuit
Perform AW4 TRANS VERIFICATION TEST-VER1.
No
→
7
Turn ignition switch to the lock position.
Disconnect the TCM harness connector.
Disconnect the Input Speed Sensor harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance between the Speed Sensor Ground circuit and ground.
Is the resistance Below 5.0 ohms?
All
Yes
→
Repair Input Speed Sensor Ground circuit short to ground.
Perform AW4 TRANS VERIFICATION TEST-VER1.
No
→
8
Turn ignition switch to the lock position.
Disconnect the TCM harness connector.
Disconnect the Input Speed Sensor harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance between the Input Speed Sensor Signal circuit and ground.
Is the resistance Below 5.0 ohms?
All
Yes
→
Repair Input Speed Sensor Signal circuit short to ground.
Perform AW4 TRANS VERIFICATION TEST-VER1.
No
→
9
Turn ignition off to the lock position.
Disconnect the TCM harness connector.
Disconnect the Input Speed Sensor harness connector.
NOTE: Check connectors - Clean/repair as necessary.
Measure the resistance between Input Speed Sensor Ground circuit and the Input
Speed Sensor Signal circuit.
Is the resistance below 5.0 ohms?
All
Yes
→
Repair the ISS Signal circuit shorted to the ISS Ground Circuit.
Perform AW4 TRANS VERIFICATION TEST-VER1.
No
→
28
TRANSMISSION
P0715-INPUT SPEED SENSOR ERROR —
Continued
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