Engine - MIL ON/DTC's P261B/P261C
T-SB-0143-10June 7, 2010
MIL "ON" DTC P261B or P261C - Coolant Pump Control Malfunction
Service Category
Engine/Hybrid System
Section
Cooling
Market
USA
Applicability
Introduction
Some vehicles may exhibit a MIL "ON" condition with one or more of the following Diagnostic Trouble Codes (DTCs):
^ P261B - Engine Coolant Pump "B" Control Malfunction
^ P261C - Engine Coolant Pump "B" Control Circuit Low Improvements have been made to the electric water pump to correct this condition.
Production Change Information
This TSB applies to vehicles produced BEFORE the Production Change Effective VINs shown.
Warranty Information
APPLICABLE WARRANTY
^ This repair is covered under the Toyota Powertrain Warranty. This warranty is in effect for 60 months or 60,000 miles, whichever occurs first, from the vehicle's in-service date.
^ Warranty application is limited to occurrence of the specified condition described in this bulletin.
Parts Information
Required Tools & Equipment
Additional TIS Techstream or Techstream Lite units may be ordered by calling Approved Dealer Equipment (ADE).
Repair Procedure
1. Using TIS Techstream check for Diagnostic Trouble Codes (DTCs).
2. Are DTCs P261B or P261C present?
^ YES - Continue to step 3.
^ NO - Diagnose other DTC(s) first.
3. Disconnect the water pump assembly connector.
4. Turn the power switch ON (IG).
5. Measure the voltage at D13-1 to body ground.
6. Is there battery voltage?
^ YES - Go to step 7.
^ NO - This TSB does NOT apply. Refer to the Repair Manual for additional diagnostics.
Refer to the Technical Information System (TIS) 2010 model year Prius Repair Manual:
Engine/Hybrid System - Engine Control - "2ZR-FXE Engine Control: SFI System: P261B-P261D: Coolant Pump "B" Control Malfunction"
7. Replace the electric water pump.
Refer to TIS 2010 model year Prius Repair Manual:
^ Engine/Hybrid System - Cooling - "2ZR-FXE Cooling: Water Pump: Removal / Installation"
8. Clear DTCs and confirm repair.