Chrysler Voyager. Manual — part 476
Symptom:
P1684-BATTERY WAS DISCONNECTED
When Monitored and Set Condition:
P1684-BATTERY WAS DISCONNECTED
When Monitored:
Whenever the key is in the Run/Start position.
Set Condition:
This code is set whenever Transmission Control Module (TCM) is
disconnected from battery power B+ or ground. It will also be set during the DRBIII
t
Quick Battery Disconnect procedure.
POSSIBLE CAUSES
QUICK LEARN WAS PERFORMED
RECENT BATTERY DISCONNECTION
TCM WAS REPLACED OR DISCONNECTED
INTERMITTENT WIRING AND CONNECTORS
FUSED B+ CIRCUIT TO TCM OPEN
GROUND CIRCUIT OPEN
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
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TRANSMISSION - EATX
TEST
ACTION
APPLICABILITY
2
Turn ignition off to the lock position.
Disconnect the TCM harness connector.
Ignition on, engine not running.
Measure the voltage of the Fused B+ circuit in the TCM harness connector.
Is the voltage below 10.0 volts?
All
Yes
→ Go To 3
No
→ Go To 5
3
Turn the ignition off to the lock position.
Disconnect the TCM harness connector.
Note: Check connectors - Clean/repair as necessary.
Ignition on, engine not running.
Using a 12-volt test light connected to ground, check the Fused B+ circuit in the TCM
harness connector.
NOTE: The test light must illuminate brightly. Compare the brightness to
that of a direct connection to the battery.
Does the test light illuminate brightly?
All
Yes
→ Go To 4
No
→ Repair the Fused B+ circuit for an open or high resistance. If the
fuse is open make sure to check for a short to ground.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
4
Turn ignition off to the lock position.
Disconnect the TCM harness connector.
Note: Check connectors - Clean/repair as necessary.
Using a 12-volt test light connected to 12-volts, check all the ground circuits in the
TCM harness connector.
NOTE: The test light must illuminate brightly. Compare the brightness to
that of a direct connection to the battery.
Does the light illuminate brightly at all the ground circuits?
All
Yes
→ Test Complete.
No
→ Repair the Ground circuit(s) as necessary.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
5
Has the battery been disconnected, lost it’s charge, or been replaced recently?
All
Yes
→ This is the cause of the DTC. Erase the DTC and return the
vehicle to the customer.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No
→ Go To 6
6
Has the Quick Learn procedure been performed?
All
Yes
→ This is the cause of the DTC. Erase the DTC and return the
vehicle to the customer.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No
→ Go To 7
7
Has the TCM been replaced or disconnected?
All
Yes
→ Replacing or disconnecting the TCM will set this DTC. Erase the
DTC and return the vehicle to the customer.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No
→ Go To 8
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TRANSMISSION - EATX
P1684-BATTERY WAS DISCONNECTED —
Continued
TEST
ACTION
APPLICABILITY
8
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.
Were there any problems found?
All
Yes
→ Repair as necessary.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No
→ Test Complete.
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P1684-BATTERY WAS DISCONNECTED —
Continued
Symptom:
P1687-NO COMMUNICATION WITH THE MIC
When Monitored and Set Condition:
P1687-NO COMMUNICATION WITH THE MIC
When Monitored:
Continuously with engine running.
Set Condition:
The DTC sets in approximately 25 seconds if no BUS messages are
received form the MIC.
POSSIBLE CAUSES
OTHER BUS PROBLEMS PRESENT
INTERMITTENT WIRING AND CONNECTORS
MIC - NO COMMUNICATION
TRANSMISSION CONTROL MODULE
TEST
ACTION
APPLICABILITY
1
With the DRBIII
t, Check the STARTS SINCE SET counter for P1687.
Note: This counter only applies to the last DTC set.
Is the STARTS SINCE SET counter set at 0?
All
Yes
→ Go To 2
No
→ Go To 5
2
With the DRBIII
t, check all of the other modules on the vehicle for evidence of a
vehicle bus problem.
Bus related DTC’s in other modules point to an overall vehicle bus problem. Other
symptoms such as a customer complaint of intermittent operation of bus controlled
features also indicate a bus problem.
Does the PRNDL display indicate
9No Bus9 or is there any evidence of an overall
vehicle bus problem?
All
Yes
→ Refer to the Communications category and perform the appropri-
ate symptom.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No
→ Go To 3
3
Ignition on, engine not running.
With the DRBIII
t, clear all DTC’s.
Start the engine in park.
With the DRBIII
t, read the MIC DTC’s.
NOTE: It may take up to 30 seconds of a consistent fault to set this DTC.
Can the DRBIII
t communicate with the MIC?
All
Yes
→ Go To 4
No
→ Refer to the Communication category and perform the appropri-
ate symptom related to No Response to MIC.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
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