Canada - Cooling System/A/C - MIL ON/DTC P1121 Set

Bulletin
TSB2247R

Issue Date
2005-06-06

Market
Canada

Title
M.I.L. "ON" DTC P1121

Component
ENGINE ELECTRICAL

Models
'04 - '07 Prius

TSB REVISION NOTICE:
- January 24, 2008: The information contained in this TSB supersedes all previous versions.
Previous versions of this TSB should be discarded.

INTRODUCTION:
Some customers with 2004 - 2007 model year Prius vehicles may experience a M.I.L. "ON" condition with DTC P1121, Coolant Flow Control Valve Position Sensor Stuck. Use the repair procedure below to address this condition.

APPLICABLE VEHICLES:
2004 - 2007 model year Prius vehicles produced BEFORE the Production Change Effective VINs shown below.






PRODUCTION CHANGE INFORMATION:






PARTS INFORMATION:






WARRANTY INFORMATION:






REQUIRED SSTs:

REPAIR PROCEDURE:
1. Check DTCs and confirm P1121 is present.






2. Remove the engine under cover LH.






3. Drain the engine coolant.
Refer to the Repair Manual within E-TAS / TIS library:
- Division: Toyota
- Model: Prius
- Year: 2004 or 2005
- Service Category: Engine/Hybrid System
- Section: Cooling
- Keyword: Engine Coolant (1NZ-FXE): Replacement

- Year: 2006 or 2007
- Service Category: Engine/Hybrid System
- Section: Cooling
- Keyword: 1NZ-FXE Cooling: Coolant: On-vehicle Inspection






4. Mark the upper coolant hose (hose to heater core). Take note of the original location of all coolant hoses.

NOTE:
Installation of the coolant hoses in the wrong location may result in cooling system malfunction.

5. Remove the electrical connector on the coolant flow control valve.
6. Remove all three coolant hoses on the coolant flow control valve.
7. Remove the coolant flow control valve from the vehicle body.
8. Install the replacement coolant flow control valve in reverse order of removal.
9. Install the engine under cover LH.
10. Refill engine coolant. Refer to the Repair Manual within E-TAS / TIS library:
- Division: Toyota
- Model: Prius
- Year: 2004 or 2005
- Service Category: Engine/Hybrid System
- Section: Cooling
- Keyword: Engine Coolant (1NZ-FXE): Replacement

- Year: 2006 or 2007
- Service Category: Engine/Hybrid System
- Section: Cooling
- Keyword: 1NZ-FXE Cooling: Coolant: On-vehicle Inspection

11. Clear DTCs.
12. Confirm the repair.

NOTE:
Issue of this Technical Service Bulletin is to ensure that proper repair information is available. IT DOES NOT CONSTITUTE AN AUTHORIZATION FOR REPAIR. Normal provisions of the formal warranty policy, as applicable, will apply.