Honda Civic. Manual — part 225

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Repair short to body ground in the wire between PCM connector
terminal B26 and the shift solenoid harness connector, then go to step 15.

NO -Go to step 14.

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

SOLENOID VALVE TEST ).

Is shift solenoid valve B and the harness OK?

YES -Go to step 21.

NO -Replace shift solenoid valve B 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. Test-drive the vehicle in 1st gear with the shift lever in D, for at least 1 second.

Then drive in 3rd gear for at least 1 second.

19. Check for DTCs with the HDS.

Is DTC P0976 indicated?

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

NO -Go to step 20.

20. Monitor the OBD STATUS for P0976 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 -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 B 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. Test-drive the vehicle in 1st gear with the shift lever in D, for at least 1 second.

Then drive in 3rd gear for at least 1 second.

23. Check for DTCs with the HDS.

Is DTC P0976 indicated?

YES -Check for intermittent short to body ground in the wire between shift
solenoid valve B 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 P0976 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 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 B 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.

2008 Honda Civic LX

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

DTC P0977: Open in Shift Solenoid Valve B Circuit

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

Is DTC P0977 indicated?

YES -Go to step 8.

NO -Go to step 5.

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

solenoid valve B with the HDS.

Is a clicking sound heard?

YES -Go to step 6.

NO -Go to step 8.

6. Test-drive the vehicle in 3rd gear with the shift lever in D, for at least 1 second.
7. Monitor the OBD STATUS for P0977 in the DTCs MENU with the HDS.

Does the HDS indicate FAILED?

YES -Go to step 8.

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)

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 B 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 B26 and C40.

Fig. 152: Measuring Resistance Between PCM Connector Terminals B26
And C40
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there 12-25 ohms?

YES -Go to step 22.

NO -Go to step 12.

12. Disconnect the shift solenoid harness connector.
13. Check for continuity between PCM connector terminal B26 and shift solenoid

harness connector terminal No. 2.

2008 Honda Civic LX

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