Honda Civic. Manual — part 1096

4. Check for DTCs with the HDS.

Is 86-31 DTC indicated?

YES -If the DTC 86-01 is indicated at the same time, do the DTC 86-01
troubleshooting (see DTC 86-01: F-CAN Bus-off Malfunction ). If 86-01 is
not indicated, go to step 5.

NO -If any DTCs are indicated, go to the indicated DTCs troubleshooting. If
DTCs are not indicated, intermittent failure, the system is OK at this time.
Check for loose terminals between the gauge control module (tach) 36P
connector and the VSA modulator-control unit 37P connector. Refer to
INTERMITTENT FAILURES TROUBLESHOOTING (see ).

5. Turn the ignition switch ON (II).

Do the gauge indicators come on?

YES -Go to step 6.

NO -Do the gauge control module troubleshooting (see SELF-DIAGNOSTIC
FUNCTION ).

6. Turn the ignition switch to LOCK (0).
7. Disconnect the gauge control module (tach) 36P connector.
8. Disconnect the VSA modulator-control unit 37P connector.
9. Check for continuity between the VSA modulator-control unit 37P connector

terminal and gauge control module (tach) 36P connector terminal (see table).

CONNECTOR TERMINAL DESCRIPTION

Sign

Connector Terminal No.

VSA Modulator-control Unit Gauge Control Module (Tach)

CAN-L

1

19

CAN-H

15

1

2008 Honda Civic GX

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

Fig. 50: Checking Continuity Between VSA Modulator-Control Unit And
Gauge Control Module 36P Connector Terminal

Is there continuity?

YES -Check for loose terminals in the gauge control module (tach) 36P
connector. If necessary, substitute a known-good gauge control module (tach),
then go to step 1 and recheck. If no DTCs are indicated, replace the original
gauge control module (tach) (see REPLACEMENT ). If DTC 86-31 resets,
replace the VSA modulator-control unit (see VSA MODULATOR-
CONTROL UNIT REMOVAL AND INSTALLATION ).

NO -Repair open in the wire between the gauge control module (tach) and the
VSA modulator-control unit.

DTC 86-71: F-CAN COMMUNICATION WITH YAW RATE-LATERAL ACCELERATION SENSOR
MALFUNCTION

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Check for DTCs with the HDS.

Is 86-71 DTC indicated?

YES -If the DTC 86-01 is indicated at the same time, do the DTC 86-01
troubleshooting (see DTC 86-01: F-CAN Bus-off Malfunction ). If 86-01 is

2008 Honda Civic GX

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

not indicated, go to step 4.

NO -If any DTCs are indicated, go to the indicated DTCs troubleshooting. If
DTCs are not indicated, intermittent failure, the system is OK at this time.
Check for loose terminals at the yaw rate-lateral acceleration sensor 5P
connector and the VSA modulator-control unit 37P connector. Refer to
INTERMITTENT FAILURES TROUBLESHOOTING (see ).

4. Turn the ignition switch to LOCK (0).
5. Disconnect the yaw rate-lateral acceleration sensor 5P connector.
6. Disconnect the VSA modulator-control unit 37P connector.
7. Check for continuity between the VSA modulator-control unit 37P connector

terminal and the yaw rate-lateral acceleration sensor 5P connector terminal (see
table).

CONNECTOR TERMINAL DESCRIPTION

Fig. 51: Checking Continuity Between VSA Modulator-Control Unit And

Sign

Connector Terminal No.

VSA Modulator-control

Unit

Yaw Rate-lateral Acceleration

Sensor

CAN-L

1

4

CAN-

H

15

3

2008 Honda Civic GX

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

YAW Rate-Lateral Acceleration Sensor 5P Connector Terminal

Is there continuity?

YES -Go to step 8.

NO -Repair open in the wire between the yaw rate-lateral acceleration sensor
and the VSA modulator-control unit.

8. Turn the ignition switch ON (II).
9. Measure voltage between yaw rate-lateral acceleration sensor 5P connector

terminal No. 1 and body ground.

Fig. 52: Measuring Voltage Between YAW Rate-Lateral Acceleration
Sensor 5P Connector Terminal And Body Ground

Is there battery voltage?

YES -Go to step 10.

NO -Check the No. 4 (7.5 A) fuse in the under-dash fuse/relay box. If the fuse
is OK, repair open in the wire between the No. 4 (7.5 A) fuse and yaw rate-
lateral acceleration sensor.

10. Turn the ignition switch to LOCK (0).
11. Reconnect the yaw rate-lateral acceleration sensor 5P connector.
12. Turn the ignition switch ON (II).
13. Measure voltage between yaw rate-lateral acceleration sensor 5P connector

terminal No. 5 and body ground.

2008 Honda Civic GX

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