Chrysler Town, Dodge Caravan. Manual — part 999
Symptom:
P0706-CHECK SHIFTER SIGNAL
When Monitored and Set Condition:
P0706-CHECK SHIFTER SIGNAL
When Monitored:
Continuously with the ignition key on.
Set Condition:
3 occurrences in one key start of an invalid PRNDL code which lasts for
more than 0.1 second.
POSSIBLE CAUSES
CONDITION P0706 PRESENT
TRS T1 SENSE CIRCUIT OPEN
TRS T3 SENSE CIRCUIT OPEN
TRS T41 SENSE CIRCUIT OPEN
TRS T42 SENSE CIRCUIT OPEN
TRS T1 SENSE CIRCUIT SHORT TO GROUND
TRS T3 SENSE CIRCUIT SHORT TO GROUND
TRS T41 SENSE CIRCUIT SHORT TO GROUND
TRS T42 SENSE CIRCUIT SHORT TO GROUND
TRS T1 SENSE CIRCUIT SHORT TO VOLTAGE
TRS T3 SENSE CIRCUIT SHORT TO VOLTAGE
TRS T41 SENSE CIRCUIT SHORT TO VOLTAGE
TRS T42 SENSE CIRCUIT SHORT TO VOLTAGE
TRANSMISSION RANGE SENSOR
TRANSMISSION CONTROL MODULE
INTERMITTENT WIRING AND CONNECTORS
32
TRANSMISSION - EATX
TEST
ACTION
APPLICABILITY
1
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.
NOTE: Always perform diagnostics with a fully charged battery to avoid
false symptoms.
With the DRBIII
t, read the engine DTC’s. Check and repair all engine DTC’s prior
to performing Transmission Symptom Diagnostics.
With the DRBIII
t, read Transmission DTC’s. Record all DTC’s and 1 Trip Failures.
NOTE: Diagnose 1 Trip Failures as a fully matured DTC.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
Repair as necessary.
Perform the Shift Lever Position Test. If the test does not pass, refer to Symptom test
for P0706 Check Shifter Signal.
For Gear Ratio DTC’s, check and record all CVI’s.
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 Control Module. Some problems
are corrected by software upgrades to the Transmission Control Module.
NOTE: Check for applicable TSB’s related to the symptom.
Perform this procedure prior to Symptom diagnosis.
All
Continue
2
Using the DRBIII
t, perform the Shift Lever Position Test.
Select the test outcome from the following:
All
Test passes
Test fails with DTC
Test fails without DTC
Adjust the shift linkage per the Service Information.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
3
The conditions necessary to set this DTC are not present at this time.
Using the schematics as a guide, inspect the wiring and connectors specific to this
circuit.
Wiggle the wiring while checking for shorted and open circuits.
Check the Shift Linkage and cable for proper operation per the Service Information.
Perform *PRNDL FAULT CLEARING PROCEDURE after completion of any repairs.
With the DRBIII
t, check the EATX EVENT DATA to help identify the conditions in
which the DTC was set.
Were there any problems found?
All
Yes
→ Repair as necessary.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No
→ Test Complete.
33
TRANSMISSION - EATX
P0706-CHECK SHIFTER SIGNAL —
Continued
TEST
ACTION
APPLICABILITY
4
Turn the ignition off to the lock position.
Remove the Starter Relay.
CAUTION: Removal of the Starter Relay is to prevent a Transmission, NO
RESPONSE, condition and disable the starter.
Install the Transmission Simulator, Miller tool #8333 and the Electronic Transmis-
sion Adapter kit, Miller tool #8333-1.
Ignition on, engine not running.
With the DRBIII
t, perform the Shift Lever Position Test.
When the DRBIII
t instructs you to put the Gear Selector in a particular position,
you must do so using the Transmission Simulator. The LED for the gear position in
question must be illuminated prior to hitting
9enter9 on the DRBIIIt.
Did the test pass?
All
Yes
→ Go To 5
No
→ Go To 6
NOTE: Disconnect the Transmission Simulator and reconnect all the har-
ness connectors.
5
If there are no possible causes remaining, view repair.
All
Repair
Replace the Transmission Range Sensor per the Service Informa-
tion.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
6
Ignition on, engine not running.
With the DRBIII
t in Inputs/Outputs, read the TRS Sense circuits C1 thru C4.
Move the shift lever thru all gear positions, pausing momentarily in each gear
position. Watch for one of the circuits to not change state.
Pick the one that did not change state.
All
TRS T1 sense (C4)
TRS T3 sense (C3)
TRS T41 sense (C1)
TRS T42 sense (C2)
7
Turn the ignition off to the lock position.
Disconnect the TRS harness connector.
Disconnect the TCM harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the TRS T1 Sense circuit from the TCM harness connector
to the TRS harness connector.
Is the resistance above 5.0 ohms?
All
Yes
→ Repair the TRS T1 Sense circuit for an open.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No
→ Go To 8
34
TRANSMISSION - EATX
P0706-CHECK SHIFTER SIGNAL —
Continued
TEST
ACTION
APPLICABILITY
8
Turn the ignition off to the lock position.
Disconnect the TRS harness connector.
Disconnect the TCM harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance between ground and the TRS T1 circuit in the TCM harness
connector.
Is the resistance below 5.0 ohms?
All
Yes
→ Repair the TRS T1 Sense circuit for a short to ground.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No
→ Go To 9
9
Turn the ignition off to the lock position.
Disconnect the TRS harness connector.
Disconnect the TCM harness connector.
Remove the Transmission Control Relay.
Note: Check connectors - Clean/repair as necessary.
Connect a jumper wire between the Fused B+ circuit and the Transmission Control
Relay Output circuit in the Transmission Control Relay connector.
Ignition on, engine not running.
Measure the voltage of the TRS T1 Sense circuit.
Is the voltage above 0.5 volt?
All
Yes
→ Repair the TRS T1 Sense circuit for a short to voltage.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No
→ Go To 19
10
Turn the ignition off to the lock position.
Disconnect the TRS harness connector.
Disconnect the TCM harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the TRS T3 Sense circuit from the TCM harness connector
to the TRS harness connector.
Is the resistance above 5.0 ohms?
All
Yes
→ Repair the TRS T3 Sense circuit for an open.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No
→ Go To 11
11
Turn the ignition off to the lock position.
Disconnect the TRS harness connector.
Disconnect the TCM harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance between ground and the TRS T3 Sense circuit.
Is the resistance below 5.0 ohms?
All
Yes
→ Repair the TRS T3 Sense circuit for a short to ground.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No
→ Go To 12
35
TRANSMISSION - EATX
P0706-CHECK SHIFTER SIGNAL —
Continued
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