# Service bulletin IB19X003

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: 10161190
- Published by NHTSA: 2019\-06\-11
- Manufacturer's number: IB19X003
- Manufacturer's date: 2019\-06\-10
- NHTSA component: SERVICE BRAKES, AIR; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL

## NHTSA's summary

"SOME CUSTOMERS MAY COMPLAIN ABOUT THE INSTRUMENT PANEL CLUSTER \(IPC\) AIR PRESSURE GAUGES FREQUENTLY DROPPING INTO THE RED \(LOW PRESSURE\) ZONE ACCOMPANIED BY AN AUDIBLE ""BUZZER"" WHEN APPLYING THE AIR BRAKES OFTEN, SUCH AS IN STOP AND GO TRAFFIC. WE HAVE DETERMINED THAT THE BRAKE AIR PRESSURE GAUGE RED ZONE BEGINS TO INDICATE LOW AIR PRESSURE UNNECESSARILY EARLY AT 88PSI \(612KPA\) AS THIS PRESSURE IS SUFFICIENT FOR THE AIR BRAKES TO OPERATE PROPERLY. SIMILARLY, THE BUZZER WILL ALSO SOUND PREMATURELY AT 78PSI \(539KPA\) AS THAT PRESSURE ALSO IS SUFFICIENT FOR THE AIR BRAKES TO OPERATE PROPERLY. FOR CUSTOMERS WHO EXPERIENCE THIS FREQUENT BUZZER ACTIVATION, ISUZU HAS RELEASED AN UPDATED PIC WITH REVISED \(IMPROVED\) RED ZONE SCALING AND BUZZER ACTIVATION. THE RED ZONE IN THE UPDATED IPC WILL BEGIN AT 73PSI \(501KPA\) AND THE BUZZER WILL ACTIVATE AT 66PSI \(462KPA\). THESE NEW PRESSURE POINTS CONTINUE TO PROVIDE APPROPRIATE AND ADEQUATE WARNING IN CASE OF LOW BRAKE AIR PRESSURE WHILE REDUCING THE UNNECESSARY AUDIBLE WARNING FOR VEHICLES WITH FREQUENT BRAKE APPLICATION, SUCH AS STOP AND GO TRAFFIC. BEFORE REPLACING THE IPC FOR THIS CUSTOMER COMPLAINT, BE SURE TO INSPECT THE AIR BRAKE SYSTEM FOR LEAKS TO ENSURE THERE IS NOT ANOTHER CAUSE FOR THIS COMPLAINT."

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2019/MC-10161190-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2019/MC-10161190-9999.pdf)

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

## Components

Brakes, Electrical system, Instrument cluster

## Vehicles listed

- 2018 ISUZU FTR

JSON: [/v1/bulletins/10161190](/v1/bulletins/10161190)

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