Canada - Engine Control - MIL ON Improved Engine Wire Harness

Bulletin
TSB3087R

Issue Date
November 12, 2008

Market
Canada

Title
M.I.L. "ON" DTC P010#, P0121, P0125, P0172, P035#, P2237, or P2238

Component
ENGINE ELECTRICAL

Models
'07-'08 Yaris

TSB REVISION NOTICE:
- March 16, 2009: The Applicable Vehicle Information table has been updated.
- The Production Change Effective VIN has been updated in Production Change Information.
Previous versions of this TSB should be discarded.

INTRODUCTION:

Some 2007 - 2008 model year Yaris vehicles may exhibit a M.I.L. "ON" DTC condition with one of the following Diagnostic Trouble Codes (DTCs):
- P0101 - Mass Air Flow Circuit Range / Performance Problem
- P0102 - Mass Air Flow Circuit Low Input
- P0103 - Mass Air Flow Circuit High Input
- P0121 - Throttle / Pedal Position Sensor/Switch "A" Circuit Range/Performance Problem
- P0125 - Insufficient Coolant Temperature for Closed Loop Fuel Control
- P0172 - System Too Rich
- P035# - Ignition Coil "#" Primary / Secondary Circuit
- P2237 - Oxygen (A/F) Sensor Pumping Current Circuit / Open
- P2238 - Oxygen (A/F) Sensor Pumping Current Circuit Low

An improved engine wire harness has been developed to address this condition. Use the following repair procedure to diagnose and repair customer complaint vehicles.






APPLICABLE VEHICLES:

PRODUCTION CHANGE INFORMATION:







This TSB applies to vehicles produced BEFORE the Production Change Effective VINs shown.






WARRANTY INFORMATION:






PARTS INFORMATION:






REQUIRED SSTS:

REPAIR PROCEDURE:

1. Using Techstream, check for stored DTCs.
2. Verify one or more of the following DTCs is present:
- P0101
- P0102
- P0103
- P0121
- P0125
- P0172
- P0351
- P0352
- P0353
- P0354
- P2237
- P2238


NOTE

If other DTCs are present along with any of the DTCs listed above, this TSB does NOT apply. Follow Repair Manual procedures to diagnose other DTCs first.

3. Follow Repair Manual procedure to inspect the suspect circuit/component.
- Model: Yaris
- Year: 2007/2008
- Service Category: Engine/Hybrid System
- Section: Engine Control

P0101:
- Keyword: 1NZ-FE Engine Control System: SFI System: P0101: Mass Air Flow Circuit Range / Performance Problem

P0102/P0203:
- Keyword: 1NZ-FE Engine Control System: SFI System: P0100: Mass or Volume Air Flow Circuit

P0121:
- Keyword: 1NZ-FE Engine Control System: SFI System: P0121: Throttle / Pedal Position Sensor / Switch A Circuit Range / Performance Problem

P0125:
- Keyword: 1NZ-FE Engine Control System: SFI System: P0125: Insufficient Coolant Temperature for Closed Loop Fuel Control

P0171/P0172:
- Keyword: 1NZ-FE Engine Control System: SFI System: P0171: System Too Lean (Bank 1)

P00351/P0352/P0353/P0354:
- Keyword: 1NZ-FE Engine Control System: SFI System: P0351: Ignition Coil "A" Primary / Secondary Circuit

P2238:
- Keyword: 1NZ-FE Engine Control System: SFI System: P2238: Oxygen (A/F) Sensor Pumping Current Circuit Low (Bank 1 Sensor 1)

P2237/P2238:
- Keyword: 1NZ-FE Engine Control System: SFI System: P2237: Oxygen (A/F) Sensor Pumping Current Circuit / Open (Bank 1 Sensor 1)

4. If the DTC related circuits and components are within Repair Manual specifications, replace the engine wire harness.
5. After replacing the engine harness, clear DTCs and verify that no DTCs reset. Then warm vehicle to operating temperature and test drive to verify 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.