Powertrain Controls - ECM/PCM

PROM HANDLING PRECAUTIONS
To prevent possible electrostatic discharge damage:

^ Do not touch the Engine Control Module (ECM) connector pins or soldered components on the ECM circuit board.

^ When handling a Programmable Read Only Memory (PROM), do not touch the component leads, and do not remove integrated circuit from carrier.

^ To prevent possible electrostatic discharge damage to the PROM, do not touch the component leads, and do not remove integrated circuit from carrier.

^ To prevent possible electrostatic discharge damage to the ECM, do not touch the connector pins or soldered components on the circuit board.

TEST DESCRIPTION
Check that all PROM pins are fully inserted in the socket and that PROM is properly latched.

If OK, replace PROM, clear memory, and recheck.

If DTC 51 reappears, replace ECM.

AFTER REPAIRS
After repairs, confirm "closed loop" operation and no Malfunction Indicator Lamp (MIL) (Service Engine Soon).