Honda Civic. Manual — part 157

1. Turn the ignition switch to ON (II), but do not start the engine.
2. Connect the HDS to the DLC (A) located behind the driver's dashboard lower

cover.

Fig. 12: Identifying Data Link Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.

3. Make sure the HDS communicates with the PCM. if it does not, go to DLC

CIRCUIT TROUBLESHOOTING .

4. Select the INSPECTION MENU with the HDS.
5. Select the ETCS TEST, then select the TP POSITION CHECK, and follow the

To prevent PCM damage, do not operate anything
electrical (audio system, brakes, A/C, power windows,
moonroof (if equipped), door locks, etc.) during the
update.

If you need to diagnose the Honda interface module
(HIM) because the HIM's red (#3) light came on or was
flashing during the update, leave the ignition switch in
the ON (II) position when you disconnect the HIM from
the data link connector (DLC). This will prevent PCM
damage.

High temperature in the engine compartment might
cause the PCM to become too hot to run the update. If
the engine has been running before this procedure,
open the hood and cool the engine compartment.

2008 Honda Civic LX

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

HDS screen prompts.

6. Exit the HDS, then select the CM update, and follow the screen prompts to

update the PCM.

7. If the PCM has the latest software, disconnect the HDS/HIM from the DLC,

and go back to the procedure that you were doing. If the software in the PCM
is not the latest, follow the instructions on the screen. If prompted to choose the
PGM-FI system or the A/T system, make sure you update both.

8. If the TP POSITION CHECK failed in step 5, clean the throttle body (see

THROTTLE BODY CLEANING ).

9. Do the PCM idle learn procedure (see ECM/PCM IDLE LEARN

PROCEDURE ).

10. Do the crank (CKP) learn procedure (see CRANK (CKP) PATTERN

NOTE:

If the TP POSITION CHECK indicates FAILED, continue
this procedure.

NOTE:

If the PCM update procedure requires you to cool the
PCM, follow the screen prompts. If you run into a
problem (programming takes over 15 minutes, status
bar goes over 100%, D or immobilizer indicator flashes,
HDS tablet freezes, etc.) during the update procedure,
follow these steps to minimize the chance of damaging
the PCM:

Leave the ignition switch in the "ON (II)" position.

Connect a jumper battery (do not connect a battery
charger).

Shut down the HDS.

Disconnect the HDS from the DLC.

Reboot the HDS.

Reconnect the HDS to the DLC, and try the update
procedure again.

2008 Honda Civic LX

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

CLEAR/CRANK (CKP) PATTERN LEARN ).

Substituting the PCM

Special Tools Required

Honda diagnostic system (HDS) tablet tester

Honda interface module (HIM) and an iN workstation with HDS and CM
update software

HDS pocket tester

GNA600 and an iN workstation with HDS and CM update software

Use this procedure when you need to substitute a known-good PCM during
troubleshooting procedures.

1. Make sure you have the anti-theft code for the audio system or the navigation

system (if equipped), then write down the audio presets.

2. Connect the HDS to the DLC (A) located behind the driver's dashboard lower

cover.

Fig. 13: Identifying Data Link Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.

3. Turn the ignition switch to ON (II).
4. Make sure the HDS communicates with the PCM. If it does not, go to DLC

CIRCUIT TROUBLESHOOTING . If you did the DLC circuit
troubleshooting, skip steps 5 thru 9, then clean the throttle body (see

2008 Honda Civic LX

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

THROTTLE BODY CLEANING ) after substituting the PCM.

5. Select the INSPECTION MENU with the HDS.
6. Select the TP POSITION CHECK in the ETCS TEST with the HDS.

7. Turn the ignition switch to LOCK (0).
8. Remove the battery.
9. Remove the PCM cover (A).

Fig. 14: Identifying PCM Cover
Courtesy of AMERICAN HONDA MOTOR CO., INC.

10. Remove the bolts (D), and remove the PCM (E).

NOTE:

If the TP POSITION CHECK indicates FAILED, continue
this procedure.

2008 Honda Civic LX

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