Service Precautions
WARNING:
- In order to avoid injury to yourself or others from accidental deployment of the air bag during servicing, read and carefully follow all the precautions and procedures described in this Service Information.
- After disconnecting the battery cable, wait 60 seconds or more before proceeding with the following work: The SRS system is designed to retain enough voltage to deploy the air bag for a short time even after the battery has been disconnected, so serious injury may result from unintended air bag deployment if work is done on the SRS system immediately after the battery cables are disconnected.
- The SRS-ECU adopts the rollover specification that the curtain airbag and seat belt pre-tensioner operate at the occurrence of rollover. Therefore, do not tilt the vehicle to the right and left with the IG ON or tilt the SRS-ECU to the right and left with the IG ON and the harness installed.
WARNING:
- Battery posts, terminals and related accessories contain lead and lead compounds. WASH HANDS AFTER HANDLING.
- Certain components of this vehicle, such as air bag modules and seat belt pre-tensioners, may contain perchlorate materials. Special handling may apply. For additional information, see www.dtsc.ca.gov/hazardouswaste/perchlorate.
- Do not use any electrical test equipment on or near the SRS components, except those specified on TEST EQUIPMENT .
- Never Attempt to Repair the Following Components: SRS-ECU, Clock Spring, Air Bag Module, Front impact sensor, Side Impact Sensor, Seat Belt with Pre-tensioner, Seat slide sensor, Front seat assembly. If any of these components are diagnosed as faulty, they should only be replaced, in accordance with the INDIVIDUAL COMPONENT SERVICE procedures in this Service Information, starting on INDIVIDUAL COMPONENT SERVICE .
- Do not attempt to repair the wiring harness connectors of the SRS. If any of the connectors are diagnosed as faulty, replace the wiring harness. If the wires are diagnosed as faulty, replace or repair the wiring harness according to the following table:
SRS-ECU CONNECTOR TERMINALS REFERENCE
| SRS-ECU terminal No. | Destination of wiring harness | Corrective action |
|---|---|---|
| 5, 6 | Instrument panel wiring harness → Clock spring → Air bag module (Driver's side) 1st squib side | Correct or replace the instrument panel wiring harness. Replace the clock spring. |
| 7, 8 | Instrument panel wiring harness → Air bag module (Front passenger's side) 1st squib side | Correct or replace the instrument panel wiring harness. |
| 9, 10 | Instrument panel wiring harness → Clock spring → Air bag module (Driver's side) 2nd squib side | Correct or replace the instrument panel wiring harness. Replace the clock spring. |
| 11, 12 | Instrument panel wiring harness → Air bag module (Front passenger's side) 2nd squib side | Correct or replace the instrument panel wiring harness. |
| 15, 16 | Can line | Correct or replace can line. |
| 17 | Instrument panel wiring harness → Ground | Correct or replace the instrument panel wiring harness. |
| 18 | Instrument panel wiring harness → Air bag OFF indicator light | Correct or replace the instrument panel wiring harness. |
| 21, 22 | Instrument panel wiring harness → Front wiring harness → Front impact sensor (LH) | Correct or replace each wiring harness. |
| 23, 24 | Instrument panel wiring harness → Front wiring harness → Front impact sensor (RH) | Correct or replace each wiring harness. |
| 31, 32 | Floor wiring harness → Side-airbag module (LH) | Correct or replace the floor wiring harness. |
| 33, 34 | Floor wiring harness → Side-airbag module (RH) | Correct or replace the floor wiring harness. |
| 35, 36 | Floor wiring harness → Lap pre-tensioner | Correct or replace the floor wiring harness. |
| 39, 40 | Floor wiring harness → Curtain air bag wiring harness (RH) → Curtain air bag module (RH) | Correct or replace each wiring harness. |
| 41, 42 | Floor wiring harness → Curtain air bag wiring harness (LH) → Curtain air bag module (LH) | Correct or replace each wiring harness. |
| 43, 44 | Floor wiring harness → Seat belt pre-tensioner (RH) | Correct or replace the floor wiring harness. |
| 45, 46 | Floor wiring harness → Seat belt pre-tensioner (LH) | Correct or replace the floor wiring harness. |
| 49, 50 | Floor wiring harness → Side impact sensor (LH) | Correct or replace the floor wiring harness. |
| 51, 52 | Floor wiring harness → Side impact sensor (RH) | Correct or replace the floor wiring harness. |
| 55, 58 | Floor wiring harness → Passenger's seat belt buckle switch | Correct or replace the floor wiring harness. |
| 61 | Floor wiring harness → ETACS-ECU (fuse No. 18) | Correct or replace the floor wiring harness. |
| 62 | Floor wiring harness → ETACS-ECU (fuse No. 12) | Correct or replace the floor wiring harness. |
WARNING:
- The SRS components and seat belt with pre-tensioner should not be subjected to heat, so remove the SRS-ECU, driver's and front passenger's air bag modules, clock spring, side-airbag modules, Curtain air bag modules, front and side impact sensor and seat belt pre-tensioner before drying or baking the vehicle after painting.
- SRS-ECU, air bag module, clock spring, impact sensor: 93°C (200°F) or more
- Seat belt with pre-tensioner 90°C (194°F) or more
- After servicing the SRS system, check the warning light operation to make sure that the system functions properly. (Refer to FASTENER TIGHTENING SPECIFICATIONS .
- Make certain that the ignition switch is in the "LOCK" (OFF) position when the scan tool is connected or disconnected.