®TOYOTA
T-SB-0011-14

Rev1

Technical Service Bulletin

February 14, 2014

MIL "ON" OTC P2646 and/or P2658
Service
Category

Engine/Hybrid System

Section

Engine Control

Market

Toyota Supports ~
ASE Certification ~

USA

Applicability
YEAR(S)

MODEL(S)

ADDITIONAL INFORMATION

2014

Corolla

VDS (s): BPRHE

REVISION NOTICE

June 19, 2014 Rev1:
• The Production Change Information section has been added.
• The Repair Procedure has been updated.
Any previous printed versions of this bulletin should be discarded.

Introduction
Some 2014 model year Corolla vehicles equipped with the 2ZR-FAE engine may exhibit a MIL "ON "
condition with either one or both of the following Diagnostic Trouble Codes (DTCs) :
•

P2646 - A Rocker Arm Actuator System Performance or Stuck Off (Bank 1)

•

P2658 - B Rocker Arm Actuator Position Sensor Circu it Range Performance (Bank 1)

The Engine Control Module (ECM , SAE term: Powertrain Control Module/PCM) calibration has been
revised . Use the following repair procedure to improve this condition .
Production Change Information
This bulletin applies to vehicles produced BEFORE the Production Change Effective VINs
shown below.
MODEL

Corolla

PLANT

PRODUCTION CHANGE EFFECTIVE VIN

TMMMS

5YFBPRHE#EP125796

TMMC

2T1BPRHE#EC151571

© 2014 Toyota Motor Sales, USA

Page 1 of 6

@ TOYOTA

T-SB-0011-14

Rev1

February 14, 2014

Page 2 of 6

MIL "ON" OTC P2646 and/or P2658

Warranty Information
OP CODE

DESCRIPTION

TIME

OFP

T1

T2

EG1401

Reprogram ECM (PCM) Engine

0.4

89661-0ZD30

8A

99

APPLICABLE WARRANTY

.
.

This repair is covered under the Toyota Federal Emission Warranty. This warranty is in effect
for 96 months or 80,000 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
PART NUMBER
PREVIOUS

NEW

89661-0ZD30

89661-0ZD31

00451-00001-LBL

PART NAME

QTY

Computer, Engine Control (ECM/PCM)

-

Authorized Modification Labels

1

NOTE

.
.

The ECM (PCM) should NOT be replaced as part of the Repair Procedure .
Authorized Modification Labels may be ordered in packages of 25 from the Materials
Distribution Center (MDC) through Dealer Daily- Dealer Support Materials Orders.

Calibration Information
CALIBRATION ID
MODEL

ENGINE

VOS
PREVIOUS

Corolla ECO

2ZR-FAE

302Y6000

© 2014 Toyota Motor Sales, USA

NEW

302Y6100

BPRHE

@TOYOTA

T-58-0011-14

Rev1

Page 3 of 6

February 14, 2014

MIL "ON" OTC P2646 and/or P2658

Required Tools & Equipment
REQUIRED EQUIPMENT

SUPPLIER

QTY

TS2UNIT

Techstream 2.0*
TIS Techstream

PART NUMBER

TSPKG 1

ADE

Techstream Lite

1

TSLITEDLR0 1

NOTE
• Only ONE of the Techstream units listed above is required.

• Software version 9.10.037 or later is required.
• Additional Techstream units may be ordered by calling Approved Dealer
Equipment (ADE) at 1-800-368-6787.
• The Diagnostic Tester is NOT recommended for flash reprogramming.
Please use Techstream or an approved J2534 interface to perform flash
reprogramming updates. Visit techinfo.toyota .com for more information
regarding J2534 reprogramming .

SPECIAL SERVICE TOOLS (SST)

PART NUMBER

QTY

GR8 Battery Diagnostic Station *

00002-MCGR8

1

NOTE
Additiona l SSTs may be ordered by calling 1-800-933-8335.
* Essential SST.

© 201 4 Toyota Motor Sales , USA

@TOYOTA

T-SB-0011-14

Rev1

February 14, 2014

Page 4 of 6

MIL "ON" OTC P2646 and/or P265B

Repair Procedure

1. Using Techstream, check for stored DTCs.
Are DTC(s) P2646 and/or P265B present?

• YES -

Continue to step 2.

• NO - This bulletin does NOT apply. Continue diagnosis using the applicable Repair Manual.
2. Clear all DTCs, start engine in Park or Neutral , increase engine RPM to 3500 for 5 seconds .
Did the DTC(s) return?

• YES • NO -

Continue to step 3.
Continue to step 7.

3. With the vehicle in IG ON/Engine OFF, clear the DTC(s) that reset, then perform the Learn Value
Reset Utility (Engine and ECT -> Utility -> Learn Value Reset) .
4. Reset connection cycle to ensure active test function.
A. Turn the ignition to IG OFF. If equipped with a standard key, remove the key from the ignition.
B. Disconnect Techstream from DLC and exit Techstream software.
C. Open Techstream software then connect Techstream to DLC.
D. Turn the ignition to IG ON . Do NOT start the vehicle at this time.
E. On Techstream , select Connect to Vehicle . Then select Engine and ECT, then choose
Data List.
5. Perform the Engine Off VALVEMATIC Active Test.
A. Set up custom data list to show VALVEMATIC Target Angle and VALVEMATIC Current Angle.
B. Select Active Test Activate the VALVEMATIC (ENG OFF) and ensure parameters are met.
C. Perform active test LOW first (right arrow). Check for change to VALVEMATIC Current Angle
(it should go to approximately 105 - 106 degrees) .
D. Perform active test HIGH (it should climb above 108 degrees).
E. It may take more than one LOW and HIGH cycle attempt to get the numbers to increase or
decrease.
6. After verifying VALVEMATIC Current Angle value changes , close Techstream software, start
engine, and increase RPM to 3500 for 5 seconds.
Did the DTC(s) return?

• YES • NO -

Repeat steps 3 to 5.
Continue to step 7.
© 2014 Toyota Motor Sales, USA

@TOYOTA

T-SB-0011-14

Rev1

February 14, 2014

Page 5 of 6

MIL "ON" OTC P2646 and/or P265B

Repair Procedure (Continued)

7. Check for the Authorized Modifications Label affixed to the vehicle in the location shown in
Figure 1. Confirm if the ECM (PCM) calibration has been updated. If the calibration ID listed is
NOT the latest ECM (PCM) calibration - go to step 8.
Figure 1. Location of Authorized Modifications Label on 2014 Corolla

THESE MODIFICATIONS HAVE BEEN APPROVED
AS APPROPRIATE BY EPA AND GARB
3 }-~~ DEALER CODE:
DATE :
CHANGE AUTHORITY:

1

Replacement ECM (PCM) Part Number (i.e.,
89661-0ZD31)

2

New Calibration ID(s) (i.e., 302Y6100)

3

Dealer Code

4

Date Completed

5

This SB Number

© 2014 Toyota Motor Sales, USA

~1---(4

5

@TOYOTA

T-SB-0011-14

Rev1

February 14, 2014

Page 6 of 6

MIL "ON" OTC P2646 and/or P2658

Repair Procedure (Continued)

8. Flash reprogram the ECM (PCM) .
NOTE
• The GR8 Battery Diagnostic Station MUST be used in Power Supply Mode to maintain
battery voltage at 13.5 volts while flash reprogramming the vehicle.
• For details on how to use the GR8 Battery Diagnostic Station, refer to the
GR8 Instruction Manual located on the Technical Information System (TIS),
Diagnostics - Tools & Equipment - Battery Diagnostics.

Follow the procedures outlined in Service Bulletin No. T-SB-0012-13, "Techstream ECU Flash
Reprogramming Procedure," and flash the ECM (PCM) with the NEW calibration file update.
9. Install the Authorized Modifications Label.

A. Using a permanent marker, enter the following information on the label :
• ECM part number [Refer to the Parts Information section for the NEW PART NUMBER]
• Calibration ID(s) [Refer to the Calibration Information section for the NEW
CALIBRATION ID]
• Dealer Code
• Repair Date
• Change Authority [This bulletin number]
B. Affix the Authorized Modifications Label to the vehicle at the location shown in Figure 1.
The Authorized Modifications Label is availabre through the MDC, P/N 00451-00001-LBL.
10. Start the engine and warm it up to normal operating temperature and test drive to confirm
proper vehicle operation .

© 2014 Toyota Motor Sales , USA