Posted on by

Centinel System – Master Repair Manual – FAULT CODE 442

Battery Voltage Out of Range – High

Overview

CODE REASON EFFECT
Fault Code: 442
PID: 
FMI: 
LAMP: Red
SRT: 

Battery Voltage Out of Range – High. Battery voltage is more than the high threshold detected by the Centinel™ control module.

The Centinel™ control module voltage supply approaching a level at which unpredictable operation will occur.

Centinel™ Control Module
SMALL | MEDIUM | LARGE

Circuit Description

The Centinel™ control module receives unswitched battery voltage from the starter for heavy-duty. For high-horsepower, the Centinel™
control module receives switched power from the fuel shutoff valve solenoid. There are two in-line 5-amp fuses in the Centinel™ control module heavy-duty harness to protect the Centinel™ control module. The high-horsepower has only one 5-amp fuse. The battery return wires in the engine harness are connected to the engine block ground.

Component Location

The location of the battery will vary with the OEM. Refer to the OEM manual for the battery location.

Shop Talk

This fault can be caused by loose or corroded battery connections.

Troubleshooting Steps

STEPS SPECIFICATIONS
STEP 1. Check the equipment battery system.  
  STEP 1A. Inspect the battery cable connections. No damaged connections
  STEP 1B. Check the battery voltage. Heavy-duty: 9 to 32 VDC12-VDC High-horsepower: 8.2 – 17.3 VDC24-VDC High-horsepower: 15.5 – 30.3 VDC
  STEP 1C. Check the Centinel™ control module battery voltage.
STEP 2. Clear the fault code.  
  STEP 2A. Disable the fault code. Fault Code 442 inactive

Guided Step 1 – Check the equipment battery system.

Guided Step 1A – Inspect the battery cable connections.

Conditions

  • Turn the keyswitch OFF.

Action

  • Corrosion
  • Loose connection.
SMALL | MEDIUM | LARGE
OK NOT OK

No damaged connections

Repair or replace the damaged connections

  • Repair the battery or starter connections.
  • Replace the battery or starter connections.

Refer to the OEM service manual.

Guided Step 1B – Check the battery voltage.

Conditions

  • Turn the keyswitch ON.

Action

  • Measure the battery voltage.
SMALL | MEDIUM | LARGE
OK NOT OK

Heavy-duty: 9 – 32 VDC

12VDC High-horsepower: 8.2 – 17.3 VDC

24VDC High-horsepower: 15.5 – 30.3 VDC

Replace the battery.

Refer to the OEM service manual.

Guided Step 1C – Check the Centinel™ control module battery voltage.

Conditions

  • Turn the keyswitch ON.

Action

  • Heavy-duty: Measure the voltage between pins 1 (+) and 2 (-) of the Centinel™ control module harness connector.
  • High-horsepower: Measure the voltage between pins 22 (+) and 25 (-)
    of the Centinel™ control module connector.
OK NOT OK

Reading must match Step 1B.

Replace the Centinel™ wiring harness.

Refer to Procedure 019-131.

Guided Step 2 – Clear the fault code.

Guided Step 2A – Disable the fault code.

Conditions

  • Connect all the components.

Action

  • Connect all the components.
  • Start the engine and let it idle for 1 minute.
  • Verify that Fault Code 442 is inactive.
SMALL | MEDIUM | LARGE
OK NOT OK

Fault Code 442 inactive

Return to the troubleshooting step or contact your local Cummins Authorized Repair Location if all the steps have been completed and checked again.

Last Modified:  25-Feb-2004
Avatar photo

Published by Jack

Hello, I'm Jack, a diesel engine fan and a blogger. I write about how to fix and improve diesel engines, from cars to trucks to generators. I also review the newest models and innovations in the diesel market. If you are interested in learning more about diesel engines, check out my blog and leave your feedback.