Symptom:
P1714-LOW BATTERY VOLTAGE
When Monitored and Set Condition:
P1714-LOW BATTERY VOLTAGE
When Monitored: With the engine running and the TCM has closed the Transmission
Control Relay.
Set Condition: If battery voltage at TCM Transmission Control Relay Output Sense
circuit is less than 10.0 volts for 15 seconds. *P-1714 generally indicates a gradually falling
battery voltage or resistive connections to the TCM.
POSSIBLE CAUSES
RELATED CHARGING SYSTEM DTCS
INTERMITTENT WIRING AND CONNECTORS
FUSED IGNITION SWITCH OUTPUT ( RUN/START) CIRCUIT OPEN
FUSED IGNITION SWITCH OUTPUT (START) CIRCUIT OPEN
GROUND CIRCUIT OPEN
FUSED B+ CIRCUIT
TRANS CONTROL RELAY OUTPUT TO TCM HIGH RESISTANCE
TCM - LOW BATTERY VOLTAGE
TEST ACTION APPLICABILITY
1NOTE: 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 DRBIIIt, read the engine DTC's. Check and repair all engine DTC's prior
to performing Transmission Symptom Diagnostics.
With the DRBIIIt, 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 P0705 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
Go To 2
75
TRANSMISSION
TEST ACTION APPLICABILITY
2 With the DRBIIIt, read the PCM DTC's.
Are any Charging System related DTC's stored in the PCM?All
Ye s®Refer to the Charging System category and repair any PCM
Charging System DTC's, before testing DTC P1714.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No®Go To 3
3 With the DRBIIIt, read Transmission DTC's.
With the DRBIIIt, Check the STARTS SINCE SET counter.
Note: This counter only applies to the last DTC set.
Is the Starts Since Set counter for P1714 set at 0?All
Ye s®Go To 4
No®Go To 10
4 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 Ignition Switch
Output 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
Ye s®Go To 5
No®Repair the Fused Ignition Switch Output (Run/Start) circuit for
an open or high resistance.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
5 Turn the ignition off to the lock position.
Disconnect the TCM harness connector.
Remove the Starter Relay from the IPM.
Turn the ignition switch to the start position.
Using a 12-volt test light connected to ground, check the Fused Ignition Switch
Output (Start) 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
Ye s®Go To 6
No®Repair the Fused Ignition Switch Output (Start) 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.
Note: Reinstall the Starter Relay.
76
TRANSMISSION
P1714-LOW BATTERY VOLTAGE ÐContinued
