E052

ECM Power And Ground Circuit:

DESCRIPTION:

Code E052 indicates that the "long term" memory in the ECM has been reset.

This will be the case whenever power is removed from the ECM (i.e., disconnecting battery cables, disconnecting ECM connector, etc.). This code should be "cleared" from memory after restoring the ECM's power supply.

If code E052 is seen accompanied by complaint of engine quit, stumble, telltale's flashing or other stored codes, check for intermittent loss of power or ground to the ECM on CKT 480 and 450 respectively. Manipulate wiring and connections with engine running. Remove and replace the ECM Jl and J2 connectors and ensure that they are latched.

Test Conditions:

Always tested.

FAILURE CONDITIONS:

ECM looks for all full time memory information to be erased or reset. If full time memory is completely erased, code E052 is logged.

ACTION TAKEN:

1. All block learn values are reset to 128 counts (see ECM learning ability).
2. E052 is stored as a history code.