SRS ± SRS Service Precautions
52B-5
SRS-ECU
Terminal No.
Destination of harness Corrective action
1, 2, 3, 4 Instrument panel wiring harness → Front wiring harness → Front
impact sensor
Repair or replace each wiring
harness.
7 Instrument panel wiring harness → Earth
8 Instrument panel wiring harness → Combination meter
(SRS warning lamp)
9, 10 Instrument panel wiring harness → Front passenger's air bag
module
11, 12 Instrument panel wiring harness → Clock spring → Driver's air bag
module
Repair or replace the dash wiring
harness. Replace clock spring.
13 Instrument panel wiring harness → Junction block (fuse No.8)
Repair or replace each wiring
16 Instrument panel wiring harness → Junction block (fuse No.6)
arness.
20 Instrument panel wiring harness → Diagnosis connector
21, 22 Body wiring harness → Side air bag module (L.H.)
23, 24 Body wiring harness → Side air bag module (R.H.)
27, 28 Body wiring harness → Seat belt with pre-tensioner (R.H.)
29, 30 Body wiring harness → Seat belt with pre-tensioner (L.H.)
34, 35, 36 Body wiring harness → Side impact sensor (L.H.)
40, 41, 42 Body wiring harness → Side impact sensor (R.H.)
6. Inspection of the SRS-ECU harness connector should be carried out by the following procedure.
Insert the special tool (probe, MB991222, in the harness set) into connector from harness side (rear
side), and connect the tester to this probe. If any tool than special is used, damage to the harness
and other components will result. Furthermore, measurement should not be carried out by touching
the probe directly against the terminals from the front of the connector. The terminals are plated to
increase their conductivity, so that if they are touched directly by the probe, the plating may break,
which will cause drops in reliability.
MB991222
SRS-ECU harness connector
SRS-ECU harness connector (rear view)
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