Honda Civic. Manual — part 184

Fig. 60: Hydraulic Fuel Pressure Flow Diagram (Full Lock-Up)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Circuit Diagram - PCM A/T Control System

Fig. 61: PCM A/T Control System - Circuit Diagram (1 Of 2)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

2008 Honda Civic LX

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

Fig. 62: PCM A/T Control System - Circuit Diagram (2 Of 2)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

DTC TROUBLESHOOTING

DTC P0107: Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage Input; DTC P0108: Manifold Absolute
Pressure (MAP) Sensor Circuit High Voltage Input

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. Turn the ignition switch to LOCK (0), then turn it to ON (II) again.
4. Check for Temporary DTCs or DTCs in the PGM-FI SYSTEM with the HDS.

Is DTC P0107 or P0108 indicated in the PGM-FI SYSTEM?

YES -Go to the INDICATED DTC'S TROUBLESHOOTING in the PGM-
FI system:

P0107 (see DTC P0107: MAP SENSOR CIRCUIT LOW VOLTAGE )

P0108 (see DTC P0108: MAP SENSOR CIRCUIT HIGH
VOLTAGE )

NO -Go to step 5.

5. Check for DTCs in the A/T SYSTEM with the HDS.

Is DTC P0107 or P0108 indicated in the A/T SYSTEM?

YES -Go to step 6.

NO -Intermittent failure, the system is OK at this time. If any other DTCs were
indicated, go to the INDICATED DTC'S TROUBLESHOOTING.

6. 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 ).

7. Start the engine, and wait for at least 2 minutes.
8. Check for DTCs in the A/T SYSTEM with the HDS.

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)

Is DTC P0107 or P0108 indicated in the A/T SYSTEM?

YES -Check for poor connections or loose terminals at the PCM. If the PCM
was updated, substitute a known-good PCM (see SUBSTITUTING THE
PCM ), then go to step 7. If the PCM was substituted, go to step 1.

NO -Go to step 9.

9. Monitor the OBD STATUS for P0107 or P0108 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 8, go to the INDICATED DTC'S
TROUBLESHOOTING.

NO -If the HDS indicates FAILED, check for poor connections or loose
terminals at the PCM. If the PCM was updated, substitute a known-good PCM
(see SUBSTITUTING THE PCM ), then go to step 7. If the PCM was
substituted, go to step 1. If the HDS indicates NOT COMPLETED, go to step
7.

DTC P0335: Crankshaft Position (CKP) Sensor No Signal; DTC P0365: Camshaft Position (CMP) Sensor No Signal

1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Start the engine.
4. Check for Temporary DTCs or DTCs in the PGM-FI SYSTEM with the HDS.

Is DTC P0335 or P0365 indicated in the PGM-FI SYSTEM?

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)