| “This site contains affiliate links for which OEMDTC may be compensated” |
Technical Bulletin
| Division: Automotive | Section Title: Engine |
| Category: Technical | TSB No. TS 24 02118 |
| SUBJECT: | CHECK ENGINE LIGHT “ON”, DTC P0128 (ENGINE COOLANT TEMPERATURE (ECT) BELOW THERMOSTAT REGULATING TEMPERATURE) -OUTSIDE TEMPERATURES BELOW FREEZING |
| MODEL(S): | XL7 (JC636) |
| YEAR: | 2007~2008 |
| CONDITION: | Check engine light is ON with DTC P0128 (Engine coolant temperature (ECT) below thermostat regulating temperature) stored. |
| CAUSE: | Mis-calibration for vehicles with rear HVAC. Heat up time exceeded due to extra coolant capacity of rear HVAC equipped vehicles. |
| CORRECTION: | DO NOT REPLACE THE ENGINE CONTROL MODULE (ECM) OR THERMOSTAT! Please follow the service manual procedure to reprogram the ECM with the latest software. Be sure to click “Clear DTC’s” after programming finishes. See below. |
PART(S) INFORMATION:
| Part Numbers | Description | QTY | Notes |
|---|---|---|---|
| 33920-78J__* | Fuel Injection Controller (ECM) | 0 | Do not replace for the above symptom. |
REQUIRED TOOLS AND SOFTWARE:
| Part Numbers | Description | QTY | Notes |
|---|---|---|---|
| 99963-00025 | Tech 2 Kit | 1 | |
| SPX3000118 | 32mb Card | 1 | Must be updated with current version from TIS2WEB |
| J-45289 | CANdi module | 1 | Connected in line of the Data Link Cable (DLC) |
| N/A | PC | 1 | Must meet minimum requirements for TIS2WEB |
| N/A | TIS2WEB | 1 | Link found in Suzuki Pitstop under “OBD-ODB II & Diagnostics” |
WARRANTY CLAIM INFORMATION
| Labor Operation | Description | Failed Part Number | Complaint Code | Defect Code | Labor Time |
|---|---|---|---|---|---|
| FB32P0 | Fuel Injection Controller (ECM) | 33920-78J__* | 36 | 48 | 0.5 Hrs. |
| Model: XL7 | Section: HVAC | TSB No. TS 24 02118 |
* Last two digits depend on vehicle year, please look up correct and complete part number.
NOTE:
The tire pressure monitoring system (TPMS) may not show tire pressures after programming. This is normal, the vehicle will have to be driven for the sensors to wake up and update the information.
Loading...
Reload document 
Open in new tab
Software and subscriptions to perform J-2535 pass thru programming depends on the vehicle to be programmed. Most Suzuki
vehicles use the SEPS Suzuki ECU Programming System software subscription, except the 07-09 XL7 which used Tis2Web and the Equator which is not reprogrammable. The SEPS software subscription is $300 per year and the Tis2Web subscription offers 24 hour access for $35.
INSTRUCTIONS FOR SEPS DOWNLOAD (a pdf document)
SPECIAL NOTE: Make sure you also download a copy of the Serial Number Letter located on the bottom of the webpage where you download the SEPS software (in Pitstop). The serial number is required in multiple locations to install the software and database files.
