STEP 5. Check the driver’s air bag module circuit. Measure the voltage at the SRS-ECU connector C-126.
(1) Disconnect the negative battery terminal.
(2) While pushing the part "A" indicated in the figure of the harness side connector, turn the lock lever to the direction of the arrow to release the lock lever, and disconnect the C-126 SRS-ECU connector.
(3) danger | To prevent the air bag from deploying unintentionally, disconnect the clock spring connector C-313 to short the squib circuit. |
Disconnect the clock spring connector C-313.
(4) caution | Insert an insulator such as a cable tie to a depth of 4mm (0.16 inch) or more, otherwise the short spring will not be released. |
Insert a cable tie [3 mm (0.12 inch) wide, 0.5 mm (0.02 inch) thick] between terminals 5, 6 <1st squib> or 3, 4 <2nd squib> and the short spring to release the short spring.
(5) Connect the negative battery terminal.
(6) Ignition switch: ON.
(7) Measure the voltage between C-126 harness side connector terminals 5 and 6 <1st squib> or 3 and 4 <2nd squib> and body ground.Voltage should measure 1 volt or less.
Is the measured voltage within the specified range?
Erase the diagnostic trouble code memory, and check the diagnostic trouble code. If DTC B1403 <1st squib> or B1483 <2nd squib> is stored, replace the SRS-ECU. (Refer to ). Then go to Step 7. Go to Step 6.