SRS SERVICE PRECAUTIONS <PHEV>


1.In order to avoid injury to yourself or others from accidental deployment of the SRS air bag during servicing, read and carefully follow all the precautions and procedures described in this manual.
2.Be sure to use the tester and special tools specified in this manual (Special tool: refer to , tester: refer to ).
3.Never attempt to repair the following components:

4.

Never attempt to repair the wiring harness connectors of the SRS. If a defective wiring harness is found, repair or replace it by referring to the table follows.
SRS-ECU terminal No.
Destination of wiring harness
Measures
1, 2
Instrument panel wiring harness → knee air bag module
Repair or replace the instrument panel wiring harness.
5, 6
Instrument panel wiring harness → clock spring → driver’s air bag module (squib)
Replace the clock spring, or repair or replace the instrument panel wiring harness.
7, 8
Instrument panel wiring harness → passenger’s (front) air bag module (squib)
Repair or replace the instrument panel wiring harness.
13
Instrument panel wiring harness → hazard indicator assembly [air bag OFF indicator lamp (passenger’s side)]
Repair or replace the instrument panel wiring harness.
15
Instrument panel wiring harness → hazard indicator assembly [air bag ON indicator lamp (passenger’s side)]
Repair or replace the instrument panel wiring harness.
16
front wiring harness
Repair or replace the front wiring harness.
17, 27
Instrument panel wiring harness → front wiring harness → front impact sensor (LH)
Repair or replace the wiring harnesses.
18, 28
Instrument panel wiring harness → front wiring harness → front impact sensor (RH)
22
Floor wiring harness → ETACS-ECU (fuse No. 16)
Repair or replace the floor wiring harness.
23
Instrument panel wiring harness → diagnosis connector
Repair or replace the instrument panel wiring harness.
24
Instrument panel wiring harness → earth
25,26
Instrument panel wiring harness → passenger’s air bag cut OFF switch
29, 30
Instrument panel wiring harness → CAN bus line
31, 32
Floor wiring harness → front passenger’s seat belt pre-tensioner
Repair or replace the floor wiring harness.
36, 37
Floor wiring harness → curtain air bag module (LH)
39, 40
Floor wiring harness → side-airbag module (LH)
41, 42
Floor wiring harness → side impact sensor (LH)
54, 55
Floor wiring harness → driver’s seat belt pre-tensioner
56, 57
Floor wiring harness → side-airbag module (RH)
59, 60
Floor wiring harness → curtain air bag module (RH)
64, 65
Floor wiring harness → side impact sensor (RH)
5.

Before maintenance, wait for 60 seconds or more after the disconnection of the battery (-) terminal. Wrap the disconnected (-) terminal with tape for insulation. The condenser inside SRS-ECU keeps a voltage necessary to expand the air bag for a certain period even after the IG power is turned OFF. Therefore, if any operation is performed before the period elapses, it may cause serious damage.
6.If the influence of heat is suspected during painting work, remove the following parts:

7.After the maintenance of the SRS air bag and seat belt with pre-tensioner is completed, be sure to delete the diagnosis code and check whether the SRS warning lamp lights up (refer to ).