Acura RL. Instruction — page 209

Fig. 9: Identifying Data Link Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.

2. Turn the ignition switch to ON (II).

3. Clear the DTC(s) on the HDS screen.

PCM Reset

This command clears stored specific data from the PCM such as DTCs freeze data, and readiness codes. It does
not clear CKP PATTERN data.

1. Reset the PCM with the HDS when the engine is stopped.

2. Turn the ignition switch to LOCK (0).

3. Turn the ignition switch to ON (II), and wait for 30 seconds.

4. Turn the ignition switch to LOCK (0), and disconnect the HDS from the DLC.

5. Do the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ).

OBD Status

The OBD Status shows the current system status of each DTC and all of the parameters. This function is used to
see if the repair was successfully completed. The results of diagnostic tests for the DTC are displayed as:

PASSED: The on-board diagnosis is successfully finished.

FAILED: The on-board diagnosis has finished but failed.

NOT COMPLETED: The on-board diagnosis was running but is out of the enable conditions of the DTC.

How to End a Troubleshooting Session (required after any troubleshooting)

1. Reset the PCM with the HDS while the engine is stopped.

NOTE:

If the HDS does not communicate with the PCM, troubleshoot the DLC
circuit; ’05-07 models (see ’05-07 MODELS ), ’08 model (see ’08 MODEL ).

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2. Do the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ).

3. Turn the ignition switch to LOCK (0).

4. Turn the ignition switch to ON (II), and wait for 30 seconds.

5. Turn the ignition switch to LOCK (0), and disconnect the HDS from the DLC.

6. Start the engine in P or N, and warm it to normal operating temperature (the radiator fan comes on).

7. To verify that the problem is repaired, test-drive the vehicle for several minutes at speeds over 30 mph

(50 km/h) or under the same conditions as those indicated by the freeze data.

Updating 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 have to update the PCM during troubleshooting procedures.

1. Turn the ignition switch to ON (II), but do not start the engine.

2. Connect the HDS to the DLC (A).

NOTE:

Make sure the HDS/HIM has the latest software version.

Before you update the PCM, make sure the battery in the vehicle is fully
charged.

Never turn the ignition switch to LOCK (0) during the update. If there is a
problem with the update, leave the ignition switch ON (II).

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

To ensure the latest program is installed, do PCM update whenever the
PCM is substituted or replaced.

You cannot update PCM with a program it already has. It will only accept a
new program.

If you need to diagnose the Honda interface module (HIM) because the
HIM’s red (#3) lamp came on or was flashed 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.

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Fig. 10: Identifying Data Link Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.

3. Make sure the HDS communicates with the PCM. If it doesn’t, go to the DLC circuit troubleshooting; ’05-

07 models (see ’05-07 MODELS ), ’08 model (see ’08 MODEL ). If you are returning from the DLC
circuit troubleshooting, skip steps 4 and 5, and clean the throttle body after updating the PCM (see ’08
MODEL
).

4. Select the INSPECTION MENU with the HDS.

5. Select the ETCS TEST, then select the TP POSITION CHECK, and follow the screen prompts with the

HDS.

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

7. If the software in the PCM is the latest, 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.

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 during the update procedure
(programming takes over 15 minutes, status bar goes over 100 %, D or
immobilizer light flashes, HDS tablet freezes, etc.), 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.

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8. If the TP POSITION CHECK failed in step 6, clean the throttle body (see THROTTLE BODY

CLEANING ).

9. Do the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ).

10. Do the CKP pattern learn procedure (see CRANK (CKP) PATTERN 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 have to substitute a known-good PCM during troubleshooting procedure.

1. Connect the HDS to the DLC (A).

Fig. 11: Identifying Data Link Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.

2. Turn the ignition switch to ON (II).

3. Make sure the HDS communicates with the PCM. If it doesn’t, go to the DLC circuit troubleshooting; ’05-

07 models (see ’05-07 MODELS ), ’08 model (see ’08 MODEL ). If you are returning from DLC circuit
troubleshooting, skip steps 4 to 5, then clean the throttle body after substituting the PCM (see ’08
MODEL
).

4. Select the INSPECTION MENU with the HDS.

5. Select the ETCS TEST, then select the TP POSITION CHECK, and follow the HDS screen prompts.

NOTE:

If the TP POSITION CHECK indicates FAILED, continue to the end of this

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