Loading...

NHTSA ID Number: 10178045

Manufacturer Communication Number: FT4890

TSB/Document Date: 2020-08-06


Summary

Air Dryer Consep Valve Relay may stuck ON, causing the Consep Valve to stay energised and to overheat.


Parts/ pièces, description

8508
5531
8526
5567
8634

LA76
LB29
LB78
LB99
LC32

NewYorkCityTransitͲNewYork
NewYorkCityTransitͲNewYork
NewYorkCityTransitͲNewYork
NewYorkCityTransitͲNewYork

NQF772004 Version2

New York City Transit New York - NYCT

8504

5602
8754

8526

5566

8633

8507

Road numbers /
No de véhicule

LA73

Order/Lot

Client

1

4

New York City Transit - New York

12135037
N8892490

DIODEASMBLACK

ADVCOILREPAIRKIT

Parts/ pièces, description

1
1
1
1
1
1
2

Part # / # de QTY /
pièce
Qté

)

12015791
12124580
15324980
12010996
12089040
15324985
G5007994

Second Level Parts (2.5% of 323 veh

CONNECTOR(FemaleWeatherPak)
TERMINALFEMALEWEATHERPACK
SEALCABLEMALE
CONNECTOR(MaleWeatherPak)
TERMINALMALE18GAGEWEATHERPK
SEALWIREFEMALE
CABLETIE

1h on 2.5% of veh

0.83h on 100% of veh

S92J2J9776935
L82JXK9777145

1
36
121

L82J3K9776984
S92J5K9777000
L82J5K9777277

36

125

L82J8K9777144
S92J6J9776873

4

QTY / QTÉ

L82J8J9776476

VIN / NIV

L82J3K9776984

S92J9J9776687

L82J9J9776924

L82J8J9776445

Labour level 2

Labour level 1

FT4890 ADV Relay Failure (MQR 7621-1891)
Luc Carignan

Part # / # de QTY /
pièce
Qté

First Level Parts (100% of X veh )

Technical writer name / nom rédacteur technique:
7621-1891

16

E
E

E

E

E
E

Lang.

x
x
Digitally signed by Jean-Nicolas Fournier
DN: cn=Jean-Nicolas Fournier, o=Nova BuseBay logo,
email=jean-nicolas.fournier@volvoeBay logo.com, c=CA
Date: 2020.07.10 07:55:38 -04'00'

FB_NYC6DE_M_04
FB_NYC4DE_M_04

x

x
FB_NYC4DE_M_03

FB_NYC6DE___04

NR R1
x
x

Programs

FB_NYC4DE___02
FB_NYC4DE_M_03

Jean-Nicolas
Fournier

NYCT
NYCT

NYCT

NYCT

NYCT

NYCT

Customer
Group/
Groupe
client

X

Removed parts are / les pièces retirées sont:
Discarded / jetées
Retained/conservées

When the retained check box is check, the parts must be retained
and returned in accordance with the usual warranty procedure to be
reimbursed

Disposal of parts / disposition des pièces

MQR

Manual/manuel, section:

QJ 7621-1891
Field Repair Instructions: ADV Relay Failure
Rev01 – For Campaign
11/05/2020

PD, CONFIDENTIAL
Date created: 21/02/2020 Latest update:
1

Fleet Affected
Lot

A73
A76
B29
B78
B99
C32

Transit Authority

New York City Transit New York – NYCT
New York City Transit New York – NYCT
New York City Transit New York - NYCT 60'
New York City Transit New York – NYCT
New York City Transit New York - NYCT 60'
New York City Transit New York - NYCT

PD, CONFIDENTIAL
Date created: 21/02/2020 Latest update:
2

Order

QTY

Road No.

LA73
LA76
LB29
LB78
LB99
LC32

4
125
36
1
36
121

8504-8507
8508-8633
5532-5602
8526
5568-5602
8634-8754

Parts Required
BOM LEVEL 1 (100%)
Item
1
2
3
4
5
6
7

Item Number
12015791
12124580
15324980
12010996
12089040
15324985
G5007994

Description
CONNECTOR (Female WeatherPak)
TERMINAL FEMALE WEATHER PACK
SEAL CABLE MALE
CONNECTOR (Male WeatherPak)
TERMINAL MALE 18GAGE WEATHERPK
SEAL WIRE FEMALE
CABLE TIE

UOM

Quantity

Comments

PC
PC
PC
PC
PC
PC
PC

1
1
1
1
1
1
2

Wire 99-105
Wire 99-105
Wire 99-105
Wire 99-103
Wire 99-103
Wire 99-103
To secure connector

BOM LEVEL 2 (est. 2.5%)
Item
1
2

Item Number
12135037
N8892490

Description
DIODE ASM BLACK
ADV COIL REPAIR KIT

SRT: Level 1

SRT: Level 2

Bypass kit install: 20m
4x diode and ADV test : 10m
Total: 30m

Diode replacement: 2m
ADV replacement: 58m

PD, CONFIDENTIAL
Date created: 21/02/2020 Latest update:
3

UOM

Quantity

PC
PC

4
1

Instructions



Make sure that the transmission is on neutral (N) and that the parking brake is applied.
Set the Master Control Switch in STOP position (see figure 1).
Before starting any work on the vehicle, make sure that the vehicle is completely and securely stationary.
Place the battery disconnect switch in OFF position at the rear of the vehicle.

Figure 1 – Master Control Switch in STOP Position

WARNING : Follow your internal safety procedures.
PD, CONFIDENTIAL
Date created: 21/02/2020 Latest update:
4

Instructions

The bus will need to be reprogramed using the supplied program. See
slide 2.

Tools needed
1) Wire cutter
2) Pin Crimper
3) Laptop & Connection cable for programming VBEA

PD, CONFIDENTIAL
Date created: 21/02/2020 Latest update:
5

Instructions
1) Locate the rear IB panel as shown:

PD, CONFIDENTIAL
Date created: 21/02/2020 Latest update:
6

Instructions
Area being worked on highlighted below in red:

PD, CONFIDENTIAL
Date created: 21/02/2020 Latest update:
7

Instructions
2) Trip breaker G to the OFF position.

PD, CONFIDENTIAL
Date created: 21/02/2020 Latest update:
8

Instructions
3) Remove the HaldexeBay logo drain valve relay from the location shown below: +IB-RL99CH1

PD, CONFIDENTIAL
Date created: 21/02/2020 Latest update:
9

Instructions
4)
Cut Wire to pin 86 (highlighted RED) &
Cut Wire to pin 87 (highlighted WHITE)
Using supplied parts re-pin Red wire
(99-105) with:
12124580 Female Terminal
12015791 Female Connector
15324980 Seal
Using Supplies parts re-pin White wire
(99-103) with:
12089040 Male Terminal
12010996 Male Connector
15324985 Seal
See next page for detailed pictures

PD, CONFIDENTIAL
Date created: 21/02/2020 Latest update:
10

Instructions
5) Connect and secure connectors using tie-wraps.

PD, CONFIDENTIAL
Date created: 21/02/2020 Latest update:
11

Instructions
6) Open rear run box, locate two splice connectors Inspect diodes (2 from each
connector) replace if found to be failed. See following slide for testing procedure.

PD, CONFIDENTIAL
Date created: 21/02/2020 Latest update:
12

Instructions
7) Test all 4 diodes: +EB-D70LA, +EB-D70LB, +EB-D70PA and +EB-D70PB
a) Remove the diode from the connector. Look at the printed diode symbol on the top of the diode to
determine the anode and cathode sides for reference.
b) Select a multimeter with a « diode check” function.
c) Touch the red (positive) lead to the diode anode side and black (negative) to the cathode side. A
result between 0.5 to 0.8 volts means the diode is working (forward bias test).
d) Reverse the polarities of the multimeter leads on the diode (reverse bias test), the multimeter
reading should read OL (open loop).
e) Replace the diode (PN: 12135037) if steps c or d fails using level 2 BOM.

PD, CONFIDENTIAL
Date created: 21/02/2020 Latest update:
13

Instructions
8) Test the ADV coil resistances: see following slide for schematic.

With the diodes removed it is possible to test each valve coil resistance using:
Valve 1: Diode D70LA pin B, Wire 72-032 and ground.
Valve 2: Diode D70LB pin D, Wire 70-035 and ground.
Valve 3: Diode D70PA pin B, Wire 70-036 and ground.
Valve 4: Diode D70PB pin D, Wire 70-039 and ground.
Coil nominal resistance and tolerance: 42 ± 2 Ohms
If the valve falls out of this specification, the coil will have to be replaced. Please see
HaldexeBay logo repair instruction letter L31168.
Once all valves pass the resistance test,
9) Trip breaker G to ON position.
10) Test the drain valves functionality using the test switches on the rear engine box.
11) Bus can be returned to service.
PD, CONFIDENTIAL
Date created: 21/02/2020 Latest update:
14

Instructions
Diodes located in
the engine box

Coil resistance test
for these 4 valves

PD, CONFIDENTIAL
Date created: 21/02/2020 Latest update:
15

PD, CONFIDENTIAL
Date created: 21/02/2020 Latest update:
16

1

SaleBestseller No. 1
Autel Scanner MaxiCOM MK900BT, 2026 MK900-BT V2.0 Bidirectional Diagnostic Tool, 8in Up of MK900 MX900 MK808S MK808BT MX808S MK808Z, 3000+ Active Tests, 40+ Service, CAN-FD&DOIP, All System, FCA 11 OS
  • 💯【Conta.ct us for Support Directly】If you met any...
  • 🔥🔥🔥【2026 AUTEL FLAGSHIP MK900BT MK900-BT, NEW...
  • 🚗【3000+ ACTIVE TESTS (50➡3000+), SAME AS MS...
  • 🚗【40+ HOT SERVICES FOR 150 MAKES (28+➡40+)】Full...
  • 🚗【OE ALL SYSTEM DIAGNOSE, AUTO SCAN 2.0: SCAN LICENSE...
SaleBestseller No. 2
Autel Professional OBD2 Scanner AL319 Code Reader, Enhanced Check and Reset Engine Fault Code, Live Data, Freeze Frame, CAN Car Diagnostic Scan Tools for All OBDII Vehicles After 1996, 2026 Upgraded
  • 【TURN OFF CEL】 This AL319 car scanner diagnostic tool...
  • 【EXTENSIVE APPLICATION】 Autel AL319 Compatible with...
  • 【FOR END USER & DIYERS】 This error code reader AL319 is...
  • 【USER-FRIENDLY DESIGN】 This OBD2 scanner and check...
  • 【HIGH-QUALITY SERVICES】 12 months war.ranty from the...

Last update on 2026-06-21 / Affiliate links / Images from Amazon Product Advertising API


 

If the PDF is very large, it may not load in the preview below.

Download PDF [1.23 MB]


Some older TSBs had multiple PDFs — visit the NHTSA Website to view all PDFs.

If the TSB PDF does not show, download or view it on the NHTSA Website.

Click on the (+) Plus Sign

Then Click on Associated Document(s)


Search NHTSA Database for Recalls

View Latest Recalls


Search NHTSA Database for Vehicle Investigations

View Latest Vehicle Investigations


Search NHTSA Database for Vehicle Complaints

View Latest Vehicle Complaints


TSB/Document ID: FT4890

Replacement Service Bulletin Number:

MFR Communication Date: 2020-07-02

MFR Internal Campaign ID/Software Version:

Communication Type: Service Bulletin/Repair Instructions

NHTSA Components: EQUIPMENT

MFR Component System:

MFR Component Subsystem:


Previous TSB

Next TSB



SaleBestseller No. 1
OBD2 Scanner Diagnostic Tool XTOOL A30M V2.0, 2026 Wireless Bidirectional Code Reader, 26 Reset, All System, Crank Sensor Relearn, EPB, Throttle Relearn, Lifetime Free Updates, Android & iOS
  • Stay Updated with Lifetime Access: This obd2 scanner includes lifetime free software updates for all app service functions. With a single payment, enjoy full access to diagnostics, reset tools, and maintenance features — zero subscription fees. A budget-friendly choice for weekend mechanics, home car owners, and DIYers, supporting vehicles from 1996 onward. Come to us with your VIN to check compatibility.
  • Full Bidirectional Control/Active Tests & Stable Wireless Connectivity: This car code reader features full bidirectional control, allowing you to send commands to the vehicle's ECU for active tests on components such as fuel pumps, injectors, A/C clutches, windows, sunroofs, and more. This car scanner diagnostic tool helps DIYers quickly diagnose and test vehicle parts, cutting down troubleshooting and repair time. With BT 4.0 wireless connectivity, you can enjoy cable-free diagnostics up to 33 feet. Stand in your garage and test windows, wipers, or even engine components—all without needing to move around your car.
  • Portable Car Scanner with 26 Special Functions: Scheduled vehicle maintenance with the A30M car diagnostic scanner can keep your vehicle in peak condition and save you big on dealership trips. The XTOOL A30M obd2 scanner diagnostic tool features essential reset and relearn functions, such as Oil Reset, EPB Reset (Electronic Parking Brake Release), SAS, ABS Brake Bleeding, Throttle Body Relearn, Injector Coding, Crank Sensor Relearn, Headlight Adjustment, and Tire Size Reset. Note: Service functions may vary by vehicle model – check compatibility beforehand!
  • Wide Compatibility CAN FD & FCAeBay logo Autoauth: This obd2 scanner diagnostic tool is compatible with over 85+ car brands from the U.S., Europe, and Asia, providing extensive coverage through a BT connection with your smartphone or iPad. Now upgraded to support the latest protocols, it includes FCAeBay logo AutoAuth access for ChryslereBay logo, JeepeBay logo, DodgeeBay logo, and FiateBay logo (2018+), and supports CAN FD for GM (2020+) models, giving you greater access to newer vehicles and systems. Note: The FCAeBay logo AutoAuth account is not included with the device. Users must register and pay separately through the official FCAeBay logo AutoAuth website to access diagnostic functions for vehicles that require it.
  • Up to 8 Live Data Streams Graphing – Real-Time Graphing for Deeper Insight: This car scanner supports up to 8 live data streams simultaneously with intuitive, real-time graphing. Gain comprehensive insights into your vehicle’s performance, making it easier to spot issues, detect trends, and make informed diagnostic decisions with confidence.
SaleBestseller No. 2
XTOOL D5S OBD2 Scanner, 16 Resets, Car Scanner for Engine ABS SRS Transmission, Crank Sensor Relearn, Throttle Relearn, EPB, Code Reader for Cars and Trucks, CAN FD&FCA Scan Tool, Lifetime Free Update
  • Comprehensive OBD2 Scanner with 16 Resets: The XTOOL D5S car code reader and vehicle reset tool provides an advanced diagnostic solution with 16 commonly needed reset functions, including Electronic Parking Brake Reset (EPB Reset), SAS, BMS Reset (Battery Test), Throttle Body Relearn, TPMS Reset, ABS Bleeding, Injector Coding, Gearbox Match, Suspension Adjustment, Headlight, Window Initialization, Crank Sensor Relearn and more. Equipped with CAN FD Protocol and FAC AutoAuth, the D5S obd2 scanner diagnostic tool ensures compatibility with a broad range of modern vehicles, allowing users to address common maintenance needs quickly. NOTE: Please Check the Compatibility before ordering.
  • 4 Main System Car Scanner & Full OBD2 Diagnostics: The XTOOL D5S car code reader is ideal for home mechanics, DIYers, and professionals, providing access to Transmission/Engine/ABS/SRS systems to read DTCs, Live data can be displayed in text or up to 4 PID data graphs, along with full OBD2 diagnostics to check the engine light on, other obd2 issues and routine maintenance. This car diagnostic scanner ensures you can keep your vehicles in top condition, avoiding costly repairs or unexpected breakdowns. NOTE: Some vehicles display three systems after connection because the transmission and engine of some vehicles are integrated into one.
  • Check Engine Code Reader & Real-Time Engine Monitoring: Whether you're a car owner, a DIYer, or run a repair shop, the XTOOL D5S obd2 scanner diagnostic tool makes engine diagnostics fast and frustration-free, reading and explaining trouble codes in seconds—no confusion. Check live data like fuel trim, 02 sensor voltage, RPM, and coolant temp to pinpoint mis~fires, rough idle, or sensor issues. After repairs, simply use the D5S check engine code reader and reset tool to turn off the check engine light and confirm the problem’s fixed—saving time, money, and unnecessary shop visits. - Note: If the check engine light comes back on, it indicates the original problem still exists.
  • Portable Car Scanner for ABS and SRS: XTOOL D5S gives you peace of mind when ABS or airbag warning lights come on. It reads and clears ABS codes to help you fix brake sensor, traction control, or wheel speed issues, and supports ABS bleeding after repairs like caliper or master cylinder replacement. For airbag systems, it scans and clears SRS codes related to airbags, seatbelt tensioners, and crash sensors. Whether you're doing repairs at home or running a small shop, the D5S is a cost-effective solution for safety diagnostics. Note: If a fault code returns after clearing, it usually means the issue hasn’t been fully resolved. Please check the compatibility before ordering.
  • Transmission Warning Light ON? Here’s the Transmission Diagnostic and Reset Tool You Need: The XTOOL D5S is more than just a basic car scanner—it’s an easy-to-use transmission diagnostic tool. From rough shifts to slipping gears, the D5S lets you read and clear transmission trouble codes, monitor real-time TCM data, and perform transmission resets after fluid changes or repairs. Whether you’re a hands-on car owner or a pro running a busy shop, this OBD2 scanner with transmission functions helps you catch problems early—saving you time, money, and future headaches.. Note: Clearing fault codes is equivalent to a reset on some vehicles, but not all. For help, contact XTOOL Tech Support.
SaleBestseller No. 3
XTOOL D8W Wireless Bidirectional Scan Tool, AI-Assisted OBD2 Scanner with Topology, 3-Year Updates, ECU C0ding, PMI, 42+ Resets, Full Diagnostic Scanner for Car, Crankshaft Relearn, FCA/CAN FD/DoIP
  • AI-Assisted Wireless Car Diagnostic Scanner Puts $2,000 Scan Tools to Rest: Upgrade Ver. of D8BT/D7W, wireless ver. of D8S, XTOOL D8W obd2 scanner diagnostic tool targeted for professional US mechanics/workshops/family garage, with 64 GB high-end hardware, 20X faster Built-in WIFI connection, More Stable than BT, packs high-level comprehensive, easy to use AI Assistance features: Topology Mapping, ECU C0ding, PMI Function, 4K+ Active Tests, All System Diagnosis, 42+ Maintenance and more, FCAeBay logo/CAN FD/DoIP, Pre/Post Scan, Diagnostic Report V2.0, etc. offers the “dealership” diagnosis, isn’t it a Top Pick Scan Tool in this budget
  • Super Powerful WI-FI Communication, Extraordinary Built-in Wireless Connectivity: The WI-FI connection, the advanced version of BT, enables the D8W car scanner diagnostic tool to connect directly to vehicles more quickly, easily by simply plugging in the VCI, with the built-in Wi-Fi inside. No additional WiFi signal is required. Its Max high-speed 64 Mbps transmission speed, 33 ft-66 ft or further diagnostic distance, and stable connectivity, makes this obd 2 scanner the winner surpasses traditional BT scanners, more stable, faster, supports longer distance, convenient, and easy to plug and play
  • Topology Mapping/AI-Assisted OE-Level Full Systems Diagnostics/Bi Directional Scan Tool/4000+ Active Test: D8W topology scan tool can scan, display all modules with a color topology structure, and view faults at a glance, comparable to other $1,200 to $2,000 obd scanners in the market. Its AI-powered system instantly analyzes fault codes and diagnostic reports for faster and precise repair solution. It also features full-featured bidirectional ability such as Compression Test, Mirror/Sunroof Test, and more active tests, save costs from "dearlership", covers more vehicles for ChryslereBay logo 2018+. Please check compatibility with XTOOL before purchase, AI is just for reference
  • Advance ECU Configuration/PMI: XTOOL D8W advanced automotive scanner diagnostic tool has the abilities for BENZ/for BMWeBay logo/for MitsubishieBay logo are designed to unleash the hidden function like turn off the seat belt buzzer and improve car performance. New launched PMI function provided by XTOOL D8W car code scanner for FordeBay logo, for LincolneBay logo, for MazdaeBay logo supports restore full ECU operation into new modules to finish replacement. Note: Please check compatibility with VIN, and Modules
  • 42+ Services/Calibration/Initialization/Matching/Relearn Functions: D8W wireless bidirectional obd2 scanner performs more than 42 comprehensive service functions for 10,000+ vehicles including Oil reset, EPB, SAS, Throttle, BMS reset, ABS Bleed, injector c0ding, Fuel Trim Reset, Cylinder Power Balance, Cam Crank Sensors Relearn, VIN Writing, Fuel Injector Balance, Language Change, Auto Stop/Start Reset, A/F Reset, PMI function, etc. Note: Special Functions do NOT work on all cars

Last update on 2026-06-21 / Affiliate links / Images from Amazon Product Advertising API


 

This product presentation was made with AAWP plugin.

Share to...