Honda Civic. Manual — part 1097

Fig. 53: Measuring Voltage Between YAW Rate-Lateral Acceleration
Sensor 5P Connector Terminal And Body Ground

Is there 0.1 V or less?

YES -Replace the yaw rate-lateral acceleration sensor (see YAW RATE-
LATERAL ACCELERATION SENSOR REPLACEMENT ).

NO -Repair open in the wire between the yaw rate-lateral acceleration sensor
and body ground (G602).

DTC 107-22: CENTRAL PROCESSING UNIT (CPU) INTERNAL CIRCUIT MALFUNCTION

1. Turn the ignition switch to LOCK (0) to cool the VSA modulator-control unit,

and wait 1 hour or more.

2. Turn the ignition switch ON (II).
3. Clear the DTC with the HDS.
4. Turn the ignition switch to LOCK (0), then turn it ON (II) again.
5. Check for DTCs with the HDS.

Is DTC 107-22 indicated?

YES -Replace the VSA modulator-control unit (see VSA MODULATOR-
CONTROL UNIT REMOVAL AND INSTALLATION ).

NO -The system is OK at this time.

DTC 108-21: STEERING ANGLE SENSOR MALFUNCTION

2008 Honda Civic GX

2006-08 BRAKES VSA System - Civic (All Except Hybrid)

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Do the VSA sensor neutral position memorization (see VSA SENSOR

NEUTRAL POSITION MEMORIZATION ).

4. Test-drive the vehicle.
5. Check for DTCs with the HDS.

Is DTC 108-21 indicated?

YES -Go to step 6.

NO -Intermittent failure, the system is OK at this time.

6. Turn the ignition switch to LOCK (0).
7. Substitute a known-good steering angle sensor (see STEERING ANGLE

SENSOR REPLACEMENT ).

8. Turn the ignition switch ON (II).
9. Clear the DTC with the HDS.

10. Do the VSA sensor neutral position memorization (see VSA SENSOR

NEUTRAL POSITION MEMORIZATION ).

11. Test-drive the vehicle.
12. Check for DTCs with the HDS.

Is DTC 108-21 indicated?

YES -Replace the VSA modulator-control unit (see VSA MODULATOR-
CONTROL UNIT REMOVAL AND INSTALLATION ).

NO -Replace the original steering angle sensor (see STEERING ANGLE
SENSOR REPLACEMENT ).

DTC 112-01: CENTRAL PROCESSING UNIT (CPU) INTERNAL CIRCUIT MALFUNCTION

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.

2008 Honda Civic GX

2006-08 BRAKES VSA System - Civic (All Except Hybrid)

3. Turn the ignition switch to LOCK (0).
4. Disconnect the VSA modulator-control unit 37P connector.
5. Measure voltage between VSA modulator-control unit 37P connector terminal

No. 13 and body ground.

Fig. 54: Measuring Voltage Between VSA Modulator-Control Unit 37P
Connector Terminal No. 13 And Body Ground

Is there battery voltage?

YES -Go to step 6.

NO -Check the battery performance (see BATTERY TEST ), and
troubleshoot the alternator and regulator circuit (see ALTERNATOR AND
REGULATOR CIRCUIT TROUBLESHOOTING ).

6. Measure voltage between VSA modulator-control unit 37P connector terminal

No. 28 and body ground.

Fig. 55: Measuring Voltage Between VSA Modulator-Control Unit 37P
Connector Terminal No. 28 And Body Ground

2008 Honda Civic GX

2006-08 BRAKES VSA System - Civic (All Except Hybrid)

Is there 0 V?

YES -Go to step 7.

NO -Repair short to power in the wire between the No. 4 (7.5 A) fuse in the
under-dash fuse-relay box and the VSA modulator-control unit.

7. Turn the ignition switch ON (II).
8. Measure voltage between VSA modulator-control unit 37P connector terminal

No. 28 and body ground.

Fig. 56: Measuring Voltage Between VSA Modulator-Control Unit 37P
Connector Terminal No. 28 And Body Ground

Is there battery voltage?

YES -Check for loose terminals in the VSA modulator-control unit 37P
connector. If necessary, substitute a known-good VSA modulator-control unit
(see VSA MODULATOR-CONTROL UNIT REMOVAL AND
INSTALLATION ), and retest.

NO -Repair open in the wire between the No. 4 (7.5 A) fuse in the under-dash
fuse-relay box and the VSA modulator-control unit.

DTC 121-XX*: VSA SOLENOID VALVE MALFUNCTION; DTC 122-XX*: VSA SOLENOID VALVE
MALFUNCTION; DTC 123-XX*: VSA SOLENOID VALVE MALFUNCTION; DTC 124-XX*: VSA
SOLENOID VALVE MALFUNCTION

*: Subcode

1. Turn the ignition switch ON (II).

2008 Honda Civic GX

2006-08 BRAKES VSA System - Civic (All Except Hybrid)