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
Go To
2
2
When monitored: Continuously with the ignition key on.
When set: No Transmission Range Sensor signals are received or two conflicting
signals are received from the Transmission Range Sensor at the same time by the
TCM.
This is the When monitored / When set conditions for DTC P0705.
All
Continue
Go To
3
3
With the DRBIII
t, read the PCM DTC’s.
Is there a Park/Neutral DTC present?
All
Yes
→
Refer to symptom P1899 P/N STUCK IN PARK OR IN GEAR in
the DRIVEABILITY category.
Perform AW4 TRANS VERIFICATION TEST-VER1.
No
→
Go To
4
4
While monitoring the INPUT/OUTPUT (SLP) with the DRBIII
t, place the gear
selector in each gear position.
Does the DRBIII
t display the current gear position selected?
All
Yes
→
Go To
5
No
→
Go To
6
5
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.
21
TRANSMISSION
P0705-RANGE SENSOR —
Continued