Toyota Corolla (E120) 2002–2008 Repair Manual / Diagnostics / Supplemental restraint system / Open in p/t squib (lh) circuit / Circuit description
Toyota Corolla (E120): Circuit description
The p/t squib circuit (lh) consists of the airbag sensor assy center and seat belt pretensioner (lh).
It causes the srs to deploy when the srs deployment conditions are satisfied.
Dtc b0136/74 is recorded when an open is detected in the p/t squib (lh) circuit
Wiring diagram
Other materials:
Ecu power source circuit
Circuit description
This circuit provides power to operate the tvip ecu.
Wiring diagram
Inspection procedure
1 Check fuse (ecu–b)
Remove the fuse from the instrument panel j/b.
check the continuity of the fuse.
Standard: continuity
2 Check tvip ecu
Disconnect ...
Inspection
1. Spark plug
Notice:
never use a wire brush for cleaning.
Never attempt to adjust the electrode gap on used
spark plug.
Spark plug should be replaced every 192,000 km
(120,000 miles).
Clean the spark plugs.
Air pressure: below 588 kpa (6.0 Kg/cm2, 85 psi)
duration: 20 sec ...
Spiral cable sub–assy
Components
Replacement
Hint: components:
1. Precaution
2. Disconnect battery negative terminal
3. Place front wheels facing straight ahead
check that the front wheels are facing straight ahead.
4. Remove horn button assy
5. Remove steering wheel assy
sst 09950–50013 ...