# Service bulletin TechTalk8121

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10191779
- Published by NHTSA: 2021\-05\-06
- Manufacturer's number: TechTalk8121
- Manufacturer's date: 2021\-04\-26
- NHTSA component: ELECTRICAL SYSTEM; SERVICE BRAKES; EQUIPMENT

## NHTSA's summary

Tech Talk continuing discussion on ABS 11 SPN 807.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10191779-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10191779-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Brakes, Electrical system, Equipment and accessories

## Vehicles listed

- 2014 FREIGHTLINER CASCADIA

## Recalls for the same vehicles and component

- [19V370000](/recalls/nhtsa/19V370000.md), 2019-05-14: SERVICE BRAKES, AIR:SUPPLY:RESERVOIR/TANK
- [17V810000](/recalls/nhtsa/17V810000.md), 2017-12-15: EQUIPMENT
- [2017583](/recalls/tc/2017583.md), 2017-11-28: Brakes
- [16V656000](/recalls/nhtsa/16V656000.md), 2016-09-13: ELECTRICAL SYSTEM
- [14V717000](/recalls/nhtsa/14V717000.md), 2014-11-10: SERVICE BRAKES, AIR
- [14V588000](/recalls/nhtsa/14V588000.md), 2014-09-23: EQUIPMENT:ELECTRICAL
- [13V627000](/recalls/nhtsa/13V627000.md), 2013-12-17: ELECTRICAL SYSTEM:WIRING; PARKING BRAKE; SUSPENSION:MULTIPLE AXLE
- [13V403000](/recalls/nhtsa/13V403000.md), 2013-09-05: SERVICE BRAKES, AIR:DISC:CALIPER
- [2013299](/recalls/tc/2013299.md), 2013-09-04: Brakes
- [13V127000](/recalls/nhtsa/13V127000.md), 2013-04-09: ELECTRICAL SYSTEM:SOFTWARE

## Other bulletins for the same vehicles and component

- [54302](/bulletins/10236419.md), 2023-05-22, Service bulletin: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. ABS Light illuminating in the ICU.
- [8V491](/bulletins/10236418.md), 2023-05-22, Service bulletin: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. ICUC Bulb check function.
- [SS3704](/bulletins/10195913.md), 2021-06-10, Service bulletin: ELECTRICAL SYSTEM. Cascadia Fault codes 6.0
- [SS469068](/bulletins/10195626.md), 2021-06-09, Service bulletin: ELECTRICAL SYSTEM. SS 469068 Cascadia SAM Cab, SAM Chassis, MSF and CGW Hardware Compatibility
- [SS1033121](/bulletins/10195576.md), 2021-06-09, Service bulletin: ELECTRICAL SYSTEM. SS 1033121 Adding a Fan Override Switch \(Legacy Cascadia\)
- [SS1033638](/bulletins/10195478.md), 2021-06-09, Service bulletin: ELECTRICAL SYSTEM. SS 1033638 \- Power Window Express Down Module Discontinued
- [TechTalk567022](/bulletins/10194890.md), 2021-06-03, Service bulletin: ELECTRICAL SYSTEM. TechTalk Discussion P3 ICU stays on Key off
- [TechTalk8048](/bulletins/10194810.md), 2021-06-02, Service bulletin: EQUIPMENT; ELECTRICAL SYSTEM; EXTERIOR LIGHTING. Tech Talk continued discussion on Trailer ABS light on even when truck off.
- [FAB153](/bulletins/10193705.md), 2021-05-18, Service bulletin: ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM; FUEL SYSTEM, GASOLINE. Freightliner Action Bulletin FAB153 New Harness Highway for Cascadia
- [TSN 01\-07c](/bulletins/10193160.md), 2021-05-13, Service bulletin: EQUIPMENT ADAPTIVE/MOBILITY. Beyond routing and wiring concerns, the PCC system as previously implemented suffers from two timing / reporting issues. One stems from the long boot\-up time of the PCC module as compared to the CPC \(a.k.a. the 6N4C timer issue\), and the other stems from the potential of some PCC modules to lock\-up \(a.k.a. the NAND flash issue\). The timer concern is considered to primarily affect EPA10 units \(OBD13 already had a longer timer\) and most can be resolved by simply refreshing the CPC software \(even if an update is not available\). The module lock\-up software solution is currently being validated, so the PDC stock is not clean yet. However, lock\-up is anticipated to only be present in approximately 8% of PCC modules \(based on testing\), so \(ahead of a campaign\), here are instructions on how to reactivate a system, verify proper operation, and drive service actions.

JSON: [/v1/bulletins/10191779](/v1/bulletins/10191779)

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