Symptom:
P0562-LOW BATTERY VOLTAGE
When Monitored and Set Condition:
P0562-LOW BATTERY VOLTAGE
When Monitored: With the engine running and the PCM has closed the Transmission
Control Relay.
Set Condition: If the battery voltage of the Transmission Control Relay Output Sense
circuit(s) to the PCM is less than 10.0 volts for the period of 15 seconds. Note: P0562
generally indicates a gradually falling battery voltage or a resistive connection(s) to the
PCM. The DTC will also set if the battery voltage sensed at the PCM is less than 6.5v for
200ms or where Transmission Control Relay Output circuits is less than 7.2v for 200ms.
POSSIBLE CAUSES
RELATED CHARGING SYSTEM DTC’S
GROUND CIRCUIT OPEN OR HIGH RESISTANCE
FUSED B+ CIRCUIT TO PCM HIGH RESISTANCE
TRANSMISSION CONTROL RELAY OUTPUT TO TCM OPEN OR HIGH RESISTANCE
TRANSMISSION CONTROL RELAY
POWERTRAIN CONTROL MODULE
INTERMITTENT WIRING AND CONNECTORS
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 DRBIIIt, read Engine DTC’s. Check and repair all Engine DTC’s prior to
performing any 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 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 Powertrain Control Module. Some problems are
corrected by software upgrades to the Transmission and Engine software.
NOTE: Check for applicable TSB’s related to the problem.
Perform this procedure prior to Symptom diagnosis.
All
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