Toyota Corolla (E120) 2002–2008 Repair Manual / Diagnostics / Supplemental restraint system / Short in p/t squib (lh) circuit (to
ground)
Toyota Corolla (E120): Short in p/t squib (lh) circuit (to ground)
Dtc b0137/71 short in p/t squib (lh) circuit (to ground)
Other materials:
Abbreviations used in this manual
...
Speed control main switch assy
Replacement
1. Disconnect battery negative terminal
2. Inspect place front wheels facing straight ahead
3. Remove horn button assy
4. Remove steering wheel assy
sst 09950–50013 (09951–05010, 09952–05010, 09953–05020, 09954–05021)
5. Remove speed control main switch assy
Remov ...
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 ...