7MGTE No CEL on Key-On - Loose ECU Connector or Burned Dash Bulb

Electricalbeginner✓ OP Confirmed

Problem

7MGTE cranks but no Check Engine Light (CEL) illuminates when key is turned to ON position, making diagnosis impossible since no trouble codes can be read

No CEL illumination on key-onEngine cranks but no startNo diagnostic codes readableNo RPM reading suspected

Root Cause

Loose 10-pin connector at the ECU with a broken retaining clip, or a burned-out CEL bulb in the instrument cluster. Either issue prevents the CEL from illuminating, masking underlying fault codes.

Confidence

Low confidence — Original poster confirmed this resolved the issue

View Original Thread →Posted February 2020 on SupraForums.com