Acura CSX. Manual — part 714

０１

ＳＮＲ９Ａ００Ｋ７９１０００ＲＡ２１ＸＦＡＡＴ００

−

−

−

−

DTC A2-1x (‘‘x’’ can be 0 thru 9 or A thru F):

YES

NO

YES

NO

24-173

SRS UNIT CONNECTOR A (28P)

Faulty Power Supply (VB Line)

NOTE: Before doing this troubleshooting procedure,
review SRS Precautions and Procedures (see page
24-13), General Troubleshooting Information (see page
24-22), and Battery Terminal Disconnection and
Reconnection (see page 22-68).

1. Check the No. 11 (10 A) fuse in the

under-dash fuse/relay box.

Go to step 2.

Replace the fuse, then turn the ignition switch

ON (II). If the fuse blows again, check for a short to
ground in the under-dash fuse/relay box No. 11
(10 A) fuse line, in the dashboard wire harness;
replace the under-dash fuse/relay box (see page
22-66), then clear the DTC.

2. Turn the ignition switch to LOCK (0). Disconnect the

negative cable from the battery, then wait at least 3
minutes.

3. Disconnect SRS unit connector A (28P) from the

SRS unit (see step 9 on page 24-21).

4. Reconnect the negative cable to the battery.

5. Connect a voltmeter between SRS unit connector A

(28P) terminal No. 18 and body ground. Turn the
ignition switch to ON (II), and measure the voltage.
There should be battery voltage when the ignition
switch is on.

Faulty SRS unit or poor contact at SRS unit

connector A (28P) and the SRS unit; check the
connection. If the connection is OK, replace the
SRS unit (see page 24-203).

Go to step 6.

Wire side of female terminals

Is the f use OK ?

Is ther e batter y voltage?

08/08/21 14:00:56 61SNR030_240_0173

０２

０３

ＳＮＲ９Ａ００Ｋ７９１０００ＲＢ２１ＸＦＡＡＴ００

−

−

−

−

−

−

−

−

YES

NO

Special Tools Required

YES

NO

YES

NO

YES

NO

DTC B2-1x:

24-174

24-174

SRS

J

SRS UNIT CONNECTOR A (28P)

UNDER-DASH
FUSE/RELAY BOX
CONNECTOR J (4P)

6. Turn the ignition switch to LOCK (0).

7. Disconnect under-dash fuse/relay box connector J

(4P).

8. Measure the resistance between SRS unit

connector A (28P) terminal No. 18 and under-dash
fuse/relay box connector J (4P) terminal No. 1.
There should be less than 1.0

.

Open in the under-dash fuse/relay box or

poor contact between connector J (4P) and the
under-dash fuse/relay box; check the connection. If
the connection is OK, replace the under-dash fuse/
relay box (see page 22-66), then clear the DTC.

Open in the dashboard wire harness; replace

the dashboard wire harness, then clear the DTC.

• SRS inflator simulator 07SAZ-TB4011A
• SRS simulator lead L 070AZ-SNA0300

NOTE: Before doing this troubleshooting procedure,
review SRS Precautions and Procedures (see page
24-13) and General Troubleshooting Information
(see page 24-22).

1. Clear the DTC memory (see page 24-23).

2. Turn the ignition switch to ON (II), and check that

the SRS indicator comes on for about 6 seconds
and then goes off.

3. Read the DTC (see page 24-22).

Go to step 4.

Go to step 5.

4. Read the DTC (see page 24-22).

Faulty rear safing sensor; replace the rear

safing sensor (see page 24-206), then clear the
DTC.

Go to step 7.

5. Read the DTC (see page 24-22).

Go to step 6.

Intermittent failure, system is OK at this time.

Go to Troubleshooting Intermittent Failures
(see page 24-24). If another DTC is indicated,
troubleshoot the DTC.

No Signal from the Rear Safing

Sensor

Wire side of female terminals

Is the r esistance as specif ied?

Does the SRS indicator stays on, and is DT C
B2-1x indicated?

Is DT C 45-11 also indicated?

Is DT C B2-1x ( except B2-11) also indicated?

08/08/21 14:00:57 61SNR030_240_0174

０１

０２

０４

１０

−

−

−

−

−

−

YES

NO

YES

NO

YES

NO

24-175

A

A

REAR SAFING SENSOR 4P CONNECTOR

REAR SAFING SENSOR 4P CONNECTOR

6. Read the DTC (see page 24-22).

Troubleshoot DTC 45-1x (see page 24-132).

Faulty rear safing sensor; replace the rear

safing sensor (see page 24-206), then clear the
DTC.

7. Turn the ignition switch to LOCK (0).

8. Disconnect the floor wire harness 4P connector (A)

from the rear safing sensor.

9. Disconnect the floor wire harness 4P connector (A)

from the left side impact sensor (first).

10. Measure the resistance between rear safing sensor

4P connector terminals No. 2 and No. 3. There
should be an open circuit or at least 1 M

.

Go to step 11.

Short in the floor wire harness; replace the

floor wire harness, then clear the DTC.

11. Measure the resistance between rear safing sensor

4P connector terminal No. 2 and body ground.
There should be an open circuit or at least 1 M

.

Go to step 12.

Short to ground in the floor wire harness;

replace the floor wire harness, then clear the
DTC.

Terminal side of female terminals

Terminal side of female terminals

Is DT C 45-11 indicated?

Is the r esistance as specif ied?

Is the r esistance as specif ied?

08/08/21 14:00:57 61SNR030_240_0175

０５

０６

０７

０１

−

−

−

−

−

−

YES

NO

YES

NO

YES

NO

24-176

SRS

REAR SAFING SENSOR 4P CONNECTOR

REAR SAFING SENSOR 4P CONNECTOR

REAR SAFING SENSOR 4P CONNECTOR

A

07SAZ-TB4011A

070AZ-SNAA300

Red wire

12. Measure the resistance between rear safing sensor

4P connector terminal No. 3 and body ground.
There should be an open circuit or at least 1 M

.

Go to step 13.

Short to ground in the floor wire harness;

replace the floor wire harness, then clear the
DTC.

13. Turn the ignition switch to ON (II).

14. Measure the voltage between rear safing sensor 4P

connector terminal No. 2 and body ground. There
should be less than 0.2 V.

Go to step 15.

Short to power in the floor wire harness;

replace the floor wire harness, then clear the
DTC.

15. Measure the voltage between rear safing sensor 4P

connector terminal No. 3 and body ground. There
should be less than 0.2 V.

Go to step 16.

Short to power in the floor wire harness;

replace the floor wire harness, then clear the
DTC.

16. Turn the ignition switch to LOCK (0).

17. Connect the SRS inflator simulator (jumper

connector) and the red lead of simulator lead L to
the floor wire harness 4P connector (A) at the left
side impact sensor (first).

Terminal side of female terminals

Terminal side of female terminals

Terminal side of female terminals

Is the r esistance as specif ied?

Is the voltage as specif ied?

Is the r esistance as specif ied?

08/08/21 14:00:58 61SNR030_240_0176