Toyota Corolla (E120): Short in d squib circuit (to b+)

Dtc b0103/12 short in d squib circuit (to b+)

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Engine mechanical
Preparation Sst Recomended tools Ssm Equipment Exhaust Preparation Equipment ...

Back up lamp assy lh
Replacement 1. Remove back up lamp assy lh Remove the service hole cover.  remove the 2 nuts and disconnect the connector. Using a mouldingremover, remove the 2 clips and back up light assy lh. 2. Install back up lamp assy lh Set the 2 clips on the back up ligh ...

Circuit description
When the ignition switch is turned on, battery positive voltage is applied to the coilwhich closes the contacts of the efi main relay (marked: efi) and supplies power to terminal +b of the ecm. This signal causes current to flow to the coil, closing the contacts of the efi relay and supplyin ...