Reduced Crawl Control Functionality (T-SB-0045-21)

WARNING: This page is about the Tacoma SR, 4D Pickup Crew Cab, 2.7L Eng VIN X, which is a different variant/trim than selected.

Publication date: 2021-06-16
Reference number: T-SB-0045-21

REDUCED CRAWL CONTROL FUNCTIONALITY

TECHNICAL SERVICE BULLETIN

Reference Number(s): T-SB-0045-21, Date of Issue: June 16, 2021

TOYOTA:	2020-2021 Tacoma
SERVICE CATEGORY:	Engine/Hybrid System
SECTION:	Engine Control
MARKET:	USA
COPYRIGHT:	© 2021 Toyota, USA License Agreement TMS1002

APPLICABILITY

YEAR(S)	MODEL(S)	ADDITIONAL INFORMATION
2020 - 2021	Tacoma	VDS(s): CZ5AN, DZ5BN, SZ5AN Transmission(s): AUTOMATIC

INTRODUCTION

On 2020 - 2021 model year Tacoma TRD Pro and TRD Off-road (4WD) vehicles equipped with Crawl Control, the Crawl Control feature may exhibit reduced functionality under some conditions. Customers may experience normal functionality on a flat or mildly inclined and smooth slope. However, the Crawl Control feature could deactivate when the system detects high torque demand seen in more traditional off-road scenarios such as a steep incline or difficult terrain. In this scenario the feature will hold the vehicle stationary for 5 - 10 seconds, then simultaneously deactivate and display the message "Crawl has been disengaged" on the MID (Multi-Information Display).

The Engine Control Module (ECM) (SAE term: Powertrain Control Module/PCM) logic has been modified to remedy this condition. Follow the Repair Procedure in this bulletin to address this condition.

PRODUCTION CHANGE INFORMATION

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

PRODUCTION CHANGE INFORMATION

MODEL	PLANT	VDS	PRODUCTION CHANGE VIN
Tacoma	TMMGT	CZ5AN	3TYCZ5AN#MT035526
		DZ5BN	3TYDZ5BN#MT002898
		SZ5AN	3TYSZ5AN#MT035478
	TMMTX	CZ5AN	5TFCZ5AN#MX271406
	TMMTX	DZ5BN	5TFDZ5BN#MX062556
	TMMBC	CZ5AN	3TMCZ5AN#MM422183
	TMMBC	DZ5BN	3TMDZ5BN#MM112523

WARRANTY INFORMATION

OP CODE

DESCRIPTION

TIME

OFP

800269

Reprogram ECM (PCM)

0.7

89661-#####⁽¹⁾

⁽¹⁾	Warranty claim MUST be submitted with the correct 10-digit OFP. Choose the correct OFP for the vehicle being repaired by searching for the parts in the Electronic Parts Catalog using the VIN filter.

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

MODEL YEAR	PART NUMBER		PART NAME	QTY
MODEL YEAR	PREVIOUS	NEW	PART NAME	QTY
2020	89661-04L50 89661-04L51	89661-04L52	Computer, Engine Control (ECM)	-
2021	89661-04L90	89661-04L91	Computer, Engine Control (ECM)	-
-	00451-00001-LBL		Authorized Modifications Labels	1

REQUIRED TOOLS & EQUIPMENT

PARTS INFORMATION

REQUIRED EQUIPMENT

SUPPLIER

PART NUMBER

QTY

Techstream ADVI⁽¹⁾

ADE

TSADVUNIT

Techstream 2.0

TS2UNIT

Techstream Lite

TSLITEPDLR01

Techstream Lite (Green Cable)

TSLP2DLR01

⁽¹⁾	Essential SST.

NOTE:

Only ONE of the Techstream units listed above is required.
Software version 16.00.021 or later is required.
Additional Techstream units may be ordered by calling Approved Dealer Equipment (ADE) at 1-800-368-6787.
Use Techstream or an approved J2534 interface to perform flash reprogramming updates. Visit techinfo.toyota.com for more information regarding J2534 reprogramming.

PARTS INFORMATION

SPECIAL SERVICE TOOLS (SST)

PART NUMBER

QTY

Battery Diagnostic Tool⁽¹⁾

DCA-8000P_T

⁽¹⁾	Essential SST.

NOTE: Additional SSTs may be ordered by calling 1-800-933-8335.

CALIBRATION INFORMATION

MODEL YEAR	GRADE	CALIBRATION ID
MODEL YEAR	GRADE	PREVIOUS	NEW
2020	TRD Pro, TRD Off-road 4WD	896650410000 8966304B800 8966304B100	896650410100/8966304B8200
2021	TRD Pro, TRD Off-road 4WD	8966304C2000	8966304C2100

REPAIR PROCEDURE

Confirm the condition exists.
Does the vehicle's Crawl Control feature exhibit reduced functionality under the conditions described in the introduction?
- YES - Continue to step 2.
- NO - This bulletin does NOT apply. Continue diagnosis using the applicable Repair Manual.
Use Techstream to confirm if the ECM (PCM) calibration has been updated and check for the Authorized Modifications Label affixed to the vehicle in the location shown below.
Is the calibration ID listed in Techstream and on the label the latest ECM (PCM) calibration?
- YES - This bulletin does NOT apply. Continue diagnosis using the applicable Repair Manual.
- NO - Continue to step 3.
Flash reprogram the ECM (PCM).
NOTE:
- The battery diagnostic tool MUST be used in Power Supply Mode to maintain battery voltage at 13.5V while flash reprogramming the vehicle.
- For details on how to use the battery diagnostic station, refer to the DCA-8000 Instruction Manual located at TIS - Diagnostics - Tools & Equipment - Battery Diagnostics .
Follow the procedures outlined in T-SB-0134-16 Techstream ECU Flash Reprogramming Procedure , and flash the ECM (PCM) with the NEW calibration file update.
Prepare and install the Authorized Modifications Label.
1. Using a permanent marker, enter the following information on the label:
  - ECM (PCM) 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]
2. Install the Authorized Modifications Label onto the vehicle at the location shown in Figure 1. The Authorized Modifications Label is available through the MDC, P/N 00451-00001-LBL.
Test-drive the vehicle to confirm proper operation.