DTC P0120 Pcm Reprogramming (TSB-98-13-013 REV)

Publication date: 1998-11-01
Reference number: TSB-98-13-013 REV

DTC P0120 PCM REPROGRAMMING

TECHNICAL SERVICE BULLETIN

Reference Number(s): TSB-98-13-013 REV

DTC P0120 PCM REPROGRAMMING

Model(s): 1999 Mitsubishi Galant; 1999 Mitsubishi Eclipse, Eclipse Spyder 2.0L Turbo FWD; 1999 Mitsubishi Eclipse 2.0L Turbo AWD; 1999 Mitsubishi Eclipse Spyder 2.4L Federal 1999 Mitsubishi Eclipse Spyder 2.4L

California Group: 13 - Fuel

Bulletin No.: TSB-98-13-013 REV.

Date: November,1998

AFFECTED VEHICLES

1999 Galant models produced before 9/1/98

1999 Eclipse and Eclipse Spyder 2.0L turbo front-wheel drive models produced before 8/15/98

1999 Eclipse 2.0L turbo all-wheel drive models produced before 10/5/98

1999 Eclipse Spyder 2.4L Federal-emissions models produced before 9/9/98

1999 Eclipse Spyder 2.4L California-emissions models produced before 10/8/98

PURPOSE

The powertrain control module (PCM) may cause the "SERVICE ENGINE SOON" light to come on. Diagnostic Trouble Code DTC P0120 "Throttle Position Circuit Malfunction" may also set in the PCM.

If the PCM has previously been reprogrammed for this condition, perform the diagnosis instructions in Group 13 of the appropriate service manual for DTC P0120.

If the PCM has not been previously reprogrammed, reprogram the PCM as described in this bulletin.

All affected vehicles in dealer stock must be reprogrammed.

PROCEDURE

CAUTION: BATTERY VOLTAGE (AS MEASURED AT THE BATTERY POSTS WITHOUT ELECTRICAL LOAD) MUST BE 12.4V OR HIGHER IN ORDER TO REPROGRAM THE PCM.

Using the MUT-II scan tool, check to see if any DTCs are set in the PCM. If any DTC except DTC P0120 is set, follow the appropriate troubleshooting and repair instructions in the service manual. Then go to Step 2.
Confirm proper TPS operation as follows:
- A: Turn the ignition key ON. On the MUT-II screen, check the MFI data list for TPS voltage. Confirm that the TPS voltage is within service manual specifications at closed throttle and at wide open throttle. Also confirm that the voltage changes smoothly as the throttle is opened and closed.
- B: If the TPS voltage reading is not within specifications or its voltage changes erratically, refer to the diagnosis instructions for DTC P0120 in Group 13 of the appropriate service manual. Then continue with Step 3.
Use the MUT-II to erase all DTCs set in the PCM.
Inspect the underhood of the vehicle for an Engine Compartment label. See Fig 8 .
- A: If there is a label indicating that this TSB has already been completed, refer to the diagnosis instructions for DTC P0120 in Group 13 of the appropriate service manual. DO NOT CONTINUE WITH THIS PROCEDURE.
- B: If there is not a label indicating that this TSB has already been completed, continue with Step 5.
Gather the following reprogramming equipment:
- Interface cartridge (red label) MB991711
- 256 KBYTE IC Memory Card (red) MB991717
- ROM Pack (red label) MB991701 (Database No. RN98101 for Galant; Database No. RN98102 for Eclipse and Eclipse Spyder)
- "Engine Compartment" and "Control Module" Labels Part No. MSSF-023G-OOA
Turn the ignition key to OFF and disconnect the MUT-II.
Install the red label interface cartridge to the MUT-II. Then install the red memory card and the appropriate red label ROM pack.
Connect the MUT-II to the vehicle. Connect BOTH the 1 6-pin and the 12-pin data link connectors.
Turn the ignition key to ON.
CAUTION: DO NOT DISTURB THE HARNESS CABLES OR CONNECTIONS.INTERRUPTION DURING THE PROGRAMMING PROCESS COULD CAUSE THE PCM TO LOSE DATA OR PREVENT FUTURE PCM REPROGRAMMING.
See Fig 1 . Enter the appropriate password. Use the left-right arrows to select the digit position. Use the up-down arrows to select the number. After entering the password, press"YES".

PASSWORDS

GALANT: 2034
ECLIPSE: 3034

ECLIPSE SPYDER: 3034

See Fig 2 . Press yes.
See Fig 3 . If the PCM has already been reprogrammed, the MUT-II will display this screen.
WARNING: If this screen is displayed. STOP! Do not continue with this procedure. Refer to the diagnosis instructions for DTC P0120 described in Group 13 of the appropriate service manual.

NOTE: The MUT-II will first display a"SUM CHECKING" message for a few seconds, indicating that the scan tool is verifying the ROM-ID.
See Fig 4 . If the PCM is unable to be reprogrammed, the MUT-II will display this screen.
NOTE: The MUT-II will first display a "SUM CHECKING" message for a few seconds, indicating that the scan tool is verifying the ROM-ID. Verify that the correct ROM pack is installed. IF THE CORRECT ROM PACK IS INSTALLED, AND THIS SCREEN IS DISPLAYED, REPLACE THE PCM. RECORD THIS MUT-II SCREEN INFORMATION AND THE ROM PACK DATABASE NUMBER ON THE REPAIR ORDER. Do not reprogram the new PCM, as it already has the updated software.
See Fig 5 . If the PCM can be reprogrammed, this screen will display. Press yes.
See Fig 6 . The MUT-II will display this screen as it reprograms the PCM. It will take a few minutes to complete.
CAUTION: DO NOT DISTURB THE HARNESS CABLES OR CONNECTIONS. INTERRUPTION DURING THE PROGRAMMING PROCESS COULD CAUSE THE PCM TO LOSE DATA OR PREVENT FUTURE PCM REPROGRAMMING.
See Fig 7 . Press "C".

Turn the ignition key to OFF. Reprogramming is complete.

To verify that the correct reprogramming has been made, the ROM ID number will display on the MUT-II screen. The table below shows the vehicle models and their appropriate ROM ID numbers that display after reprogramming.

APPROPRIATE ROM ID NUMBER

Vehicle	Engine Type	ECU P/N	ROM ID #
Eclipse/Eclipse Spyder 2-wheel drive	2.0L Turbo	MD359402	236304
Eclipse all-wheel drive	2.0L Turbo	MD359403	236404
Eclipse Spyder California emissions	2.4L	MD359404	236504
Eclipse Spyder Federal emissions	2.4L	MD359405	236604
Galant California emissions	V6	MD355248	204118
Galant Federal emissions	V6	MD355249	204316
Galant California emissions	2.4L	MD355244	206122
Galant Federal emissions	2.4L	MD355245	206422

Using a ball-point pen, enter the appropriate PCM part number, vendor number, ROM ID#, this TSB number (TSB-98-13-013), your dealer code, and the current date on the Engine Compartment Label.

VENDOR NUMBER

Model	Application	Vendor Number
Eclipse	2.0L front-wheel drive turbo	E2T68282H1
Eclipse	2.0L all-wheel drive turbo	E2T68283H1
Eclipse Spyder	2.0L turbo	E2T68282H1
Eclipse Spyder	2.4L California emissions	E2T68284H1
Eclipse Spyder	2.4L Federal emissions	E2T68285H1
Galant	3.0L California emissions	E2T70271H3H1
Galant	3.0L Federal emissions	E2T70272H3H1
Galant	2.4L California emissions	E2T70173H4H1
Galant	2.4L Federal emissions	E2T70174H4H1

If the Engine Compartment Label does not provide a space for the vendor number and ROM ID#, write information in as shown in Fig 8 .

NOTE: The "Control Module" label will not be used for this bulletin. Discard this label.

Carefully remove all dirt and oil from the vacant area shown on the underside of the hood. See Fig 9 & 10. Affix the Engine Compartment label in the appropriate area shown.