Honda Civic. Manual — part 210

16. Check for DTCs with the HDS.

Is DTC P0796 or P0797 indicated?

YES -Go to step 9.

NO -Go to step 17.

17. Monitor the OBD STATUS for P0796 or P0797 in the DTCs MENU with the

HDS.

Does the HDS indicate PASSED?

YES -Troubleshooting is complete. If any other DTCs were indicated in step
16, go to the INDICATED DTC'S TROUBLESHOOTING.

NO -If the HDS indicates FAILED, go to step 9. If the HDS indicates NOT
COMPLETED, go to step 14.

DTC P0812: Open in Transmission Range Switch ATP R Switch Circuit

1. Turn the ignition switch to ON (II).
2. Shift to R, and check the A/T R SWITCH in the DATA LIST with the HDS.

Is the A/T R SWITCH ON?

YES -Intermittent failure, the system is OK at this time.

NO -Go to step 3.

NOTE:

Before you troubleshoot, record all freeze data and any
on-board snapshot with the HDS, and review General
Troubleshooting Information (see GENERAL
TROUBLESHOOTING INFORMATION ).

This code is caused by an electrical circuit problem and
cannot be caused by a mechanical problem in the
transmission.

2008 Honda Civic LX

2006-08 TRANSMISSION Automatic Transmission - Civic (Except Hybrid)

3. Turn the ignition switch to LOCK (0).
4. Disconnect the transmission range switch connector.
5. Check for continuity between transmission range switch connector terminal

No. 10 and body ground.

Fig. 118: Checking Continuity Between Transmission Range Switch
Connector Terminal 10 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Go to step 6.

NO -Repair open in the wire between transmission range switch connector
terminal No. 10 and ground (G101) (see CONNECTOR TO HARNESS
INDEX ), or repair poor ground (G101), then go to step 9.

6. Turn the ignition switch to ON (II).
7. Measure the voltage between transmission range switch connector terminals

No. 7 and No. 10.

2008 Honda Civic LX

2006-08 TRANSMISSION Automatic Transmission - Civic (Except Hybrid)

Fig. 119: Measuring Voltage Between Transmission Range Switch
Connector Terminals 7 And 10
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there about 5 V?

YES -Go to step 8.

NO -Repair open in the wire between PCM connector terminal B14 and the
transmission range switch, then go to step 9.

8. Check for continuity between transmission range switch connector terminals

No. 7 and No. 10 while the shift lever is in R, and when the shift lever is
shifted to any position other than R.

Fig. 120: Checking Continuity Between Transmission Range Switch
Connector Terminals 7 And 10
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity while the shift lever is in R, and no continuity when the shift
lever is shifted to any position other than R?

2008 Honda Civic LX

2006-08 TRANSMISSION Automatic Transmission - Civic (Except Hybrid)

YES -Go to step 16.

NO -Replace the transmission range switch (see TRANSMISSION RANGE
SWITCH REPLACEMENT ), then go to step 9.

9. Reconnect all connectors.

10. Turn the ignition switch to ON (II).
11. Clear the DTC with to the HDS.
12. Test-drive the vehicle with the shift lever in R at speeds below 3 mph (5 km/h)

for at least 2 seconds. Then increase the speed and drive over 3 mph (5 km/h)
for at least 2 seconds.

13. Turn the ignition switch to LOCK (0). Repeat the test-drive in step 12, then go

to step 14.

14. Check for DTCs with the HDS.

Is DTC P0812 indicated?

YES -Check for poor connections or loose terminals between the transmission
range switch and the PCM, then go to step 1.

NO -Go to step 15.

15. Monitor the OBD STATUS for P0812 in the DTCs MENU with the HDS.

Does the HDS indicate PASSED?

YES -Troubleshooting is complete. If any other DTCs were indicated in step
14, go to the INDICATED DTC'S TROUBLESHOOTING.

NO -If the HDS indicates FAILED, check for poor connections or loose
terminals between the transmission range switch and the PCM, then go to step
1. If the HDS indicates NOT COMPLETED, go to step 12.

16. Update the PCM if it does not have the latest software (see UPDATING THE

PCM ), or substitute a known-good PCM (see SUBSTITUTING THE
PCM ).

2008 Honda Civic LX

2006-08 TRANSMISSION Automatic Transmission - Civic (Except Hybrid)