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Acura CSX. Manual - part 687

０１

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−

DTC 21-8x (‘‘x’’ can be 0 thru 9 or A thru F):

Special Tools Required

YES

24-65

070AZ-SNAA200

07SAZ-TB4011A

Short to Power in the Driver’s Seat Belt
Tensioner

• SRS inflator simulator 07SAZ-TB4011A
• SRS simulator lead K 070AZ-SNAA200

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. 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.

Go to step 3.

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.

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

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

4. Remove the B-pillar lower trim (see page 20-72),

then disconnect the floor wire harness 4P
connector (A) from the driver’s seat belt tensioner.

5. Connect the SRS inflator simulator (2

connectors) and simulator lead K to the floor wire
harness.

6. Reconnect the negative cable to the battery.

7. Clear the DTC memory.

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

Go to step 9.

Short to power in the driver’s seat belt

tensioner; replace the driver’s seat belt (see page
24-4), then clear the DTC.

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

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

Does the SRS indicator stay on, and is DT C 21-8x
indicated?

Is DT C 21-8x indicated?

08/08/21 13:56:55 61SNR030_240_0065

０２

ＳＮＲ９Ａ００Ｋ７９１０００Ｒ２１９ＸＦＡＡＴ００

−

YES

Special Tools Required

YES

DTC 21-9x (‘‘x’’ can be 0 thru 9 or A thru F):

24-66

SRS

SRS UNIT CONNECTOR B (28P)

10. Disconnect both seat belt buckle tensioner

connectors (see step 8 on page 24-21) and front
passenger’s seat belt tensioner connector (see step
7 on page 24-21).

11. Disconnect SRS unit connector B (28P) from the

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

12. Disconnect the simulator lead from the floor wire

harness.

13. Reconnect the negative cable to the battery.

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

15. Measure the voltage between body ground and

SRS unit connector B (28P) terminals No. 1 and
No. 2, individually. There should be less than 0.2 V.

Faulty SRS unit or poor connection at SRS

unit connector B (28P) and the SRS unit. Check the
connection; if the connection is OK, replace the
SRS unit (see page 24-203).

Short to power in the floor wire harness;

replace the floor wire harness, then clear the
DTC.

• SRS inflator simulator 07SAZ-TB4011A
• SRS simulator lead K 070AZ-SNAA200

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.

Go to step 3.

Intermittent failure, system is OK at this time.

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

Short to Ground in the Driver’s Seat Belt
Tensioner

Wire side of female terminals

Is the voltage as specif ied?

Does the SRS indicator stay on, and is DT C 21-9x
indicated?

08/08/21 13:56:55 61SNR030_240_0066

０１

０２

−

YES

24-67

070AZ-SNAA200

07SAZ-TB4011A

SRS UNIT CONNECTOR B (28P)

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

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

4. Remove the B-pillar lower trim (see page 20-72),

then disconnect the floor wire harness 4P
connector (A) from the driver’s seat belt tensioner.

5. Connect the SRS inflator simulator (2

connectors) and simulator lead K to the floor wire
harness.

6. Reconnect the negative cable to the battery.

7. Clear the DTC memory.

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

Go to step 9.

Short to ground in the driver’s seat belt

tensioner; replace the driver’s seat belt (see page
24-4), then clear the DTC.

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

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

10. Disconnect both seat belt buckle tensioner

connectors (see step 8 on page 24-21) and front
passenger’s seat belt tensioner connector (see step
7 on page 24-21).

11. Disconnect SRS unit connector B (28P) from the

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

12. Disconnect the simulator lead from the floor wire

harness.

13. Measure the resistance between body ground and

SRS unit connector B (28P) terminals No. 1 and
No. 2, individually. There should be an open circuit
or at least 1 M

Faulty SRS unit or poor connection at SRS

unit connector B (28P) and the SRS unit. Check the
connection; if the connection is OK, replace the
SRS unit (see page 24-203).

Short to ground in the floor wire harness;

replace the floor wire harness, then clear the
DTC.

Wire side of female terminals

Is DT C 21-9x indicated?

Is the r esistance as specif ied?

08/08/21 13:56:55 61SNR030_240_0067

０１

ＳＮＲ９Ａ００Ｋ７９１０００Ｒ２２１ＸＦＡＡＴ２０

−

DTC 22-1x (‘‘x’’ can be 0 thru 9 or A thru F):

Special Tools Required

YES

24-68

SRS

070AZ-SNAA200

07SAZ-TB4011A

Open in the Front Passenger’s Seat Belt
Tensioner

• SRS inflator simulator 07SAZ-TB4011A
• SRS simulator lead K 070AZ-SNAA200

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.

Go to step 3.

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.

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

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

4. Remove the B-pillar lower trim (see page 20-72),

then disconnect the floor wire harness 4P
connector (A) from the front passenger’s seat belt
tensioner.

5. Connect the SRS inflator simulator (2

connectors) and simulator lead K to the floor wire
harness.

Does the SRS indicator stay on, and is DT C 22-1x
indicated?

08/08/21 13:56:56 61SNR030_240_0068

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