E023 Part 2 of 2

Code E23 (Con`t.):

NOTES ON FAULT TREE:

5. Checking for HEI module able to recognize a voltage on the bypass circuit and to stop grounding EST (PCM/ECM controlling timing).

6. Checking for bypass signal to the module. If bypass is being sent by the PCM/ECM to the HEI and if the module is interpreting bypass voltage correctly, then the module will switch "OFF" the ground to the EST.

7. If the chart leads to "EST circuit is OK" then a fault may exist in the 4 way weatherpack. Check for proper connector mating and for pins backing out of the weatherpack. If no trouble is found with the connector, reconnect the four way connector, clear codes and retest.