Honda Civic. Manual — part 227

Fig. 155: Measuring Resistance Between PCM Connector Terminals B20
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 B20 and C40.

Fig. 156: Checking Continuity Between PCM Connector Terminals B20
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 B20 and the shift solenoid harness connector, then go to step 15.

2008 Honda Civic LX

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

NO -Go to step 14.

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

SOLENOID VALVE TEST ).

Is shift solenoid valve C and the harness OK?

YES -Go to step 21.

NO -Replace shift solenoid valve C 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 3rd gear in D, for at least 1 second.

19. Check for DTCs with the HDS.

Is DTC P0979 indicated?

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

NO -Go to step 20.

20. Monitor the OBD STATUS for P0979 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 C and the PCM, then go to step 1. If
the HDS indicates NOT COMPLETED, go to step 18.

2008 Honda Civic LX

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

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 3rd gear in D, for at least 1 second.

23. Check for DTCs with the HDS.

Is DTC P0979 indicated?

YES -Check for intermittent short to body ground in the wire between shift
solenoid valve C 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 P0979 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 C 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 P0980: Open in Shift Solenoid Valve C Circuit

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 ).

2008 Honda Civic LX

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

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 P0980 indicated?

YES -Go to step 8.

NO -Go to step 5.

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

solenoid valve C with the HDS.

Is a clicking sound heard?

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 P0980 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 C 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.

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)