Honda Civic. Manual — part 186

NO -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, go to the INDICATED DTC'S
TROUBLESHOOTING.

DTC P0705: Short in Transmission Range Switch Circuit (Multiple Shift-position Input)

1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Start the engine.
4. With the brake pedal pressed, move the shift lever through all positions. Stop

for at least 1 second in each position.

5. Monitor the OBD STATUS for P0705 in the DTCs MENU with the HDS.

Does the HDS indicate FAILED?

YES -Go to step 6.

NO -If the HDS indicates PASSED, intermittent failure, the system is OK at
this time. Check for intermittent short to body ground in the wires between the
transmission range switch and the PCM. If the HDS indicates NOT
COMPLETED, go to step 3.

6. Turn the ignition switch to LOCK (0).
7. Inspect the transmission range switch (see TRANSMISSION RANGE

SWITCH TEST ).

Is the switch OK?

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 -With the switch connector disconnected, go to step 8.

NO -Replace the transmission range switch (see TRANSMISSION RANGE
SWITCH REPLACEMENT ), then go to step 50.

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

No. 6 and No. 10.

Fig. 63: Measuring Voltage Between Transmission Range Switch
Connector Terminals No. 6 And No. 10
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there about 5 V?

YES -Go to step 15.

NO -Go to step 10.

10. Turn the ignition switch to LOCK (0).
11. Jump the SCS line with the HDS.
12. Disconnect PCM connector B (44P).
13. Check for continuity between PCM connector terminal B13 and body ground.

2008 Honda Civic LX

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

Fig. 64: Checking Continuity Between PCM Connector Terminal B13 And
Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Repair short to body ground in the wire between PCM connector
terminal B13 and the transmission range switch, then go to step 50.

NO -Go to step 14.

14. Check for continuity between transmission range switch connector terminal

No. 10 and body ground.

Fig. 65: Checking Continuity Between Transmission Range Switch
Connector Terminal No. 10 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Go to step 57.

2008 Honda Civic LX

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

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 50.

15. Measure the voltage between transmission range switch connector terminals

No. 7 and No. 10.

Fig. 66: Measuring Voltage Between Transmission Range Switch
Connector Terminals No. 7 And No. 10
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there about 5 V?

YES -Go to step 20.

NO -Go to step 16.

16. Turn the ignition switch to LOCK (0).
17. Jump the SCS line with the HDS.
18. Disconnect PCM connector B (44P).
19. Check for continuity between PCM connector terminal B14 and body ground.

2008 Honda Civic LX

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