Honda Civic. Manual — part 223

Is DTC P0973 indicated?

YES -Check for intermittent short to body ground in the wire between shift
solenoid valve A and the PCM, then go to step 1.

NO -Go to step 20.

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

Does the HDS indicate PASSED?

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

NO -If the HDS indicates FAILED, check for intermittent short to body ground
in the wire between shift solenoid valve A and the PCM, then go to step 1. If
the HDS indicates NOT COMPLETED, go to step 18.

21. 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 ).

22. 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.

23. Check for DTCs with the HDS.

Is DTC P0973 indicated?

YES -Check for intermittent short to body ground in the wire between shift
solenoid valve A and the PCM. If the PCM was updated, substitute a known-
good PCM (see SUBSTITUTING THE PCM ), then go to step 22. If the
PCM was substituted, go to step 1.

NO -Go to step 24.

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

Does the HDS indicate PASSED?

2008 Honda Civic LX

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

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 23, go to the INDICATED DTC'S
TROUBLESHOOTING.

NO -If the HDS indicates FAILED, check for intermittent short to body ground
in the wire between shift solenoid valve A and the PCM. If the PCM was
updated, substitute a known-good PCM (see SUBSTITUTING THE PCM ),
then go to step 22. If the PCM was substituted, go to step 1. If the HDS
indicates NOT COMPLETED, go to step 22.

DTC P0974: Open in Shift Solenoid Valve A Circuit

1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Start the engine with the shift lever in P, and wait for at least 1 second.
4. Check for DTCs with the HDS.

Is DTC P0974 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?

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 6.

NO -Go to step 8.

6. Start the engine with the shift lever in P, and wait for at least 1 second.
7. Monitor the OBD STATUS for P0974 in the DTCs MENU with the HDS.

Does the HDS indicate FAILED?

YES -Go to step 8.

NO -If the HDS indicates PASSED, intermittent failure, the system is OK at
this time. Check for poor connections or loose terminals 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. 147: Measuring Resistance Between PCM Connector Terminals B10
And C40
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there 12-25 ohms?

YES -Go to step 22.

NO -Go to step 12.

2008 Honda Civic LX

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

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

harness connector terminal No. 5.

Fig. 148: Checking Continuity Between PCM Connector Terminal B10
And Shift Solenoid Harness Connector Terminal 5
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Go to step 14.

NO -Repair open in the wire between PCM connector terminal B10 and the
shift solenoid harness connector, then go to step 16.

14. Remove the shift solenoid harness (see SHIFT SOLENOID VALVE AND

SHIFT SOLENOID WIRE HARNESS REPLACEMENT ).

15. Check for continuity between shift solenoid harness connector terminal No. 5

and the shift solenoid valve A connector terminal.

2008 Honda Civic LX

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