Honda Civic. Manual — part 222

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, check for poor connections or loose
terminals between A/T clutch pressure control solenoid valve C and the PCM,
then go to step 1. If the HDS indicates NOT COMPLETED, go to step 15.

18. 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 ).

19. Start the engine, and wait for at least 1 second.
20. Check for DTCs with the HDS.

Is DTC P0971 indicated?

YES -Check for poor connections or loose terminals between A/T clutch
pressure control solenoid valve C and the PCM. If the PCM was updated,
substitute a known-good PCM (see SUBSTITUTING THE PCM ), then go to
step 19. If the PCM was substituted, go to step 1.

NO -Go to step 21.

21. Monitor the OBD STATUS for P0971 in the DTCs MENU with the HDS.

Does the HDS indicate PASSED?

YES -If the PCM was updated, troubleshooting is complete. If the PCM was
substituted, replace the original PCM (see ECM/PCM REPLACEMENT ). If
any other DTCs were indicated in step 20, go to the INDICATED DTC'S
TROUBLESHOOTING.

NO -If the HDS indicates FAILED, check for poor connections or loose
terminals between A/T clutch pressure control solenoid valve C and the PCM.
If the PCM was updated, substitute a known-good PCM (see
SUBSTITUTING THE PCM ), then go to step 19. If the PCM was
substituted, go to step 1. If the HDS indicates NOT COMPLETED, go to step
19.

2008 Honda Civic LX

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

DTC P0973: Short in Shift Solenoid Valve A Circuit

1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Test-drive the vehicle in 2nd gear with the shift lever in D, for at least 1

second.

4. Check for DTCs with the HDS.

Is DTC P0973 indicated?

YES -Go to step 8.

NO -Go to step 5.

5. Select Shift Solenoid Valve A in the Miscellaneous Test Menu, and test shift

solenoid valve A with the HDS.

Is a clicking sound heard?

YES -Go to step 6.

NO -Go to step 8.

6. Test-drive the vehicle in 2nd gear with the shift lever in D, for at least 1

second.

7. Monitor the OBD STATUS for P0973 in the DTCs MENU with the HDS.

Does the HDS indicate FAILED?

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)

YES -Go to step 8.

NO -If the HDS indicates PASSED, intermittent failure, the system is OK at
this time. Check for intermittent short to body ground in the wire between shift
solenoid valve A and the PCM. If the HDS indicates NOT COMPLETED, go
to step 5.

8. Turn the ignition switch to LOCK (0).
9. Jump the SCS line with the HDS.

10. Disconnect PCM connectors B (44P) and C (44P).
11. Measure the resistance between PCM connector terminals B10 and C40.

Fig. 145: Measuring Resistance Between PCM Connector Terminals B10
And C40
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there less than 12 ohms?

YES -Go to step 12.

NO -Go to step 21.

12. Disconnect the shift solenoid harness connector.
13. Check for continuity between PCM connector terminals B10 and C40.

2008 Honda Civic LX

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

Fig. 146: Checking Continuity Between PCM Connector Terminals B10
And C40
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Repair short to body ground in the wire between PCM connector
terminal B10 and the shift solenoid harness connector, then go to step 15.

NO -Go to step 14.

14. Inspect shift solenoid valve A and the shift solenoid harness (see SHIFT

SOLENOID VALVE TEST ).

Is shift solenoid valve A and the harness OK?

YES -Go to step 21.

NO -Replace shift solenoid valve A or the shift solenoid harness (see SHIFT
SOLENOID VALVE AND SHIFT SOLENOID WIRE HARNESS
REPLACEMENT ), then go to step 15.

15. Reconnect all connectors.
16. Turn the ignition switch to ON (II).
17. Clear the DTC with the HDS.
18. Start the engine with the shift lever in P, and wait for at least 1 second. Then

drive the vehicle in 2nd gear in D, for at least 1 second.

19. Check for DTCs with the HDS:

2008 Honda Civic LX

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