4T65-E Automatic Transaxle
DTC P0562
Circuit Description
The transmission control module (TCM) samples the system voltage on the Ignition 1 circuit every 0.1 seconds. Lower than normal voltage may be inadequate to operate the transmission control solenoids properly. Improper solenoid operation may cause erratic ratio control operation, which may result in internal damage.
If the TCM detects low voltage for a number of samples, DTC P0562 sets. DTC P0562 is a type C DTC.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC P0562 System Voltage Low
Conditions for Running The DTC
The engine speed is 1,200 RPM or greater.
Conditions for Setting The DTC
The TCM detects system voltage of 11 volts or less for 10 seconds.
Action Taken When the DTC Sets
^ The TCM does not request the ECM to illuminate the malfunction indicator lamp (MIL).
^ The TCM records the operating conditions when the Conditions for Setting the DTC are met. The TCM records this information as Failure Records.
^ The TCM stores DTC P0562 in TCM history.
Conditions for Clearing the DTC
^ A scan tool can clear the DTC.
^ The TCM clears the DTC from TCM history if the vehicle completes 40 warm-up cycles without a non-emission related diagnostic fault occurring.
^ The TCM cancels the DTC default actions when the ignition switch is OFF long enough in order to power down the TCM.
Diagnostic Aids
Inspect for the following conditions:
^ Loose or damaged terminals at the generator
^ Loose or worn generator drive belt
^ Inspect the connectors at the TCM, the transmission, and all other circuit connecting points for an intermittent condition. Refer to Testing for Intermittent Conditions and Poor Connections.
^ Inspect the circuit wiring for an intermittent condition. Refer to Testing for Electrical Intermittents. Component Tests and General Diagnostics
Test Description
The numbers below refer to the step numbers on the diagnostic table.
4. This step tests the charging system voltage with a nominal load.
5. This step obtains the ignition voltage measurement reported by the TCM.
6. This step tests the voltage drop from the battery and ignition voltage input at the TCM.
10. This step tests the voltage drop from the ground terminals of the TCM to the ground terminal of the battery.
Step 1 - Step 6:
Step 7 - Step 12:
