For a complete wiring diagram Refer to Section 8W.

Theory of Operation

Friction element distress could result from an insufficient supply voltage to properly control the solenoids. To prevent this possibility, the battery voltage is monitored and the system is placed in logical limp-in if the battery voltage drops below the limit.

• When Monitored:

  With the engine running and the PCM has requested the TIPM to activate the Transmission Control Output circuit.

• Set Condition:

  If the battery voltage of the Transmission Output 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 6.5-volts for 200ms or where the Transmission Output circuits are less than 7.2-volts for 200ms.

Diagnostic Test

NOTE: Generator, battery, and charging system must be fully functional before performing this test.

NOTE: This counter only applies to the last DTC set.

NOTE: Check connectors - Clean/repair as necessary.

CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller tool #8815 to perform diagnosis.

NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.

NOTE: The (T16) Transmission Control Output circuit branches off to both Transmission Solenoid/TRS Assembly and the PCM.