Posted on by

FAULT CODE Multiple B

Fault Codes 352 and 431

Overview

CODE REASON EFFECT
Fault Code: Multiple
PID: None
FMI: None
LAMP: Yellow
SRT: 00-615

No outgoing voltage detected at the ECM switch supply pin 10 of the OEM harness and no voltage detected at pins 9 and 6 of the OEM harness.

Cruise control/PTO and engine brakes will not work and ECM loses signal from all cab switches.

Idle Validation Circuit
SMALL | MEDIUM | LARGE

Circuit Description

The idle validation ON/OFF switch and all cab switches are powered by the +5 VDC common switch supply.

Component Location

The +5 VDC switch supply circuit is located in the OEM harness. Refer to the vehicle manufacturer’s manual for the specification.

Shop Talk

If no voltage is detected on pin 10 of the OEM harness, no power is sent to any cab switches. These include clutch switch, brake switch, engine brake on/off, etc.

Cautions and Warnings

 CAUTION 

To reduce the possibility of pin and harness damage, use the following test leads when taking a measurement:
Part Number 3822758 – male Deutsch/AMP/Metri-Pack test lead
Part Number 3822917 – female Deutsch/AMP/Metri-Pack test lead.
 CAUTION 

To reduce the possibility of damaging the new ECM, all other active fault codes must be investigated prior to replacing the ECM.
 CAUTION 

To reduce the possibility of pin and harness damage, use the following test lead when taking a measurement:
Part Number 3822917 – female Deutsch/AMP/Metri-Pack test lead.
 CAUTION 

To reduce the possibility of pin and harness damage, use the following test lead when taking a measurement:
Part Number 3822758 – male Deutsch/AMP/Metri-Pack test lead.

Troubleshooting Steps

STEPS SPECIFICATIONS
STEP 1. Check the OEM harness.  
  STEP 1A. Inspect the OEM harness, bulkhead connector, and ECM connector pins. No damaged pins
  STEP 1B. Read the fault codes. Fault Code 431 active
  STEP 1C. Check the supply voltage. 4.75 to 5.25 VDC
STEP 2. Check switch circuits.  
  STEP 2A. Check cruise control on/off switch for short circuit to ground. More than 100k ohms
  STEP 2B. Check engine brake on/off switch for short circuit to ground. More than 100k ohms
  STEP 2C. Check idle validation switch for short circuit to ground. More than 100k ohms
  STEP 2D. Check remote PTO switch for short circuit to ground. More than 100k ohms
  STEP 2E. Check cruise control select switch for short circuit to ground. More than 100k ohms
  STEP 2F. Check service brake pressure switch for short to ground. More than 100k ohms
  STEP 2G. Check idle adjust switch for short circuit to ground. More than 100k ohms
  STEP 2H. Check diagnostic switch for short circuit to ground. More than 100k ohms
  STEP 2I. Check clutch switch for short circuit to ground. More than 100k ohms
STEP 3. Check signal wires.  
  STEP 3A. Check pins 2, 4, 5, 6, 9, 12, 13, 14, 21, 22, and 23 for short circuit to ground. More than 100k ohms
  STEP 3B. Check pin 10 for short circuit to ground. More than 100k ohms
STEP 4. Check for a short circuit from pin to pin.  
  STEP 4A. Measure resistance from signal pins 2, 4, 5, 6, 9, 10, 12, 13, 14, 15, 21, 22, and 23 to pins 7, 19, 24, and 26 in the OEM connector. More than 100k ohms
STEP 5. Clear the fault codes.  
  STEP 5A. Disable the fault code. Fault Codes 352 and 431 inactive
  STEP 5B. Clear the inactive fault codes. All fault codes cleared

Guided Step 1 – Check the OEM harness.

Guided Step 1A – Inspect the OEM harness, bulkhead connector, and ECM connector pins.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the OEM harness connector from the ECM.
  • Flush and clean the connectors using electronic contact cleaner, Part Number 3824510.

Action

  • Bent or broken pins
  • Pushed back or expanded pins
  • Corroded pins
  • Moisture in or on the connector
  • Missing or damaged seals
  • Dirt or debris in or on the connector pins.
OK NOT OK

No damaged pins

Repair the damaged pins.

  • Flush the dirt, debris, or moisture from the connector pins using electronic contact cleaner, Part Number 3824510.
  • Repair the OEM harness. Refer to Procedure 019-203.
  • Replace the OEM harness. Refer to the OEM Troubleshooting and Repair Manual.
  • Replace the ECM. Refer to Procedure 019-031.
  • Replace the o-ring on the 28-pin connector if it is damaged or missing. Refer to Procedure 019-203.

Guided Step 1B – Read the fault codes.

Conditions

  • Turn keyswitch OFF.
  • Connect all components.

Action

  • Start the engine and let it idle for one minute.
  • Read the fault codes using INSITE™ electronic service tool.
OK NOT OK

Fault Code 431 active

Repair complete.

 CAUTION 

To reduce the possibility of damaging the new ECM, all other active fault codes must be investigated prior to replacing the ECM.
 CAUTION 

To reduce the possibility of pin and harness damage, use the following test lead when taking a measurement:
Part Number 3822917 – female Deutsch/AMP/Metri-Pack test lead.
Guided Step 1C – Check the supply voltage.

Conditions

  • Disconnect the OEM harness connector from the ECM.
  • Turn keyswitch ON.

Action

  • Measure the supply voltage from the ECM OEM port pin 10 to ground.
SMALL | MEDIUM | LARGE
OK NOT OK

4.75 to 5.25 VDC

Replace the ECM. Refer to Procedure 019-031.

Guided Step 2 – Check switch circuits.

Guided Step 2A – Check cruise control on/off switch for short circuit to ground.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the cruise control on/off switch from the OEM harness.

Action

  • Measure the resistance from each of the switch terminals to the engine block ground. Refer to Procedure 019-021.
OK NOT OK

More than 100k ohms

Replace cruise control on/off switch. Refer to the OEM repair manual.

Guided Step 2B – Check engine brake on/off switch for short circuit to ground.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the engine brake on/off switch from the OEM harness.

Action

  • Measure the resistance from each of the switch terminals to the engine block ground. Refer to Procedure 019-034.
OK NOT OK

More than 100k ohms

Replace engine brake on/off switch. Refer to the OEM repair manual.

Guided Step 2C – Check idle validation switch for short circuit to ground.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the idle validation switch from the OEM harness.

Action

  • Measure the resistance from each of the switch terminals to the engine block ground. Refer to Procedure 019-054.
OK NOT OK

More than 100k ohms

Replace idle validation switch. Refer to the OEM repair manual.

Guided Step 2D – Check remote PTO switch for short circuit to ground.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the remote PTO switch from the OEM harness.

Action

  • Measure the resistance from each of the switch terminals to the engine block ground. Refer to Procedure 019-080.
OK NOT OK

More than 100k ohms

Replace remote PTO switch. Refer to the OEM repair manual.

Guided Step 2E – Check cruise control select switch for short circuit to ground.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the cruise control select switch from the OEM harness.

Action

  • Measure the resistance from each of the switch terminals to the engine block ground. Refer to Procedure 019-023.
OK NOT OK

More than 100k ohms

Replace cruise control select switch. Refer to the OEM repair manual.

Guided Step 2F – Check service brake pressure switch for short to ground.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the service brake pressure switch from the OEM harness.

Action

  • Measure the resistance from each of the switch terminals to the engine block ground. Refer to Procedure 019-088.
OK NOT OK

More than 100k ohms

Replace service brake pressure switch. Refer to the OEM repair manual.

Guided Step 2G – Check idle adjust switch for short circuit to ground.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the idle adjust switch from the OEM harness.

Action

  • Measure the resistance from each of the switch terminals to the engine block ground. Refer to Procedure 019-052.
OK NOT OK

More than 100k ohms

Replace idle adjust switch. Refer to the OEM repair manual.

Guided Step 2H – Check diagnostic switch for short circuit to ground.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the diagnostic switch from the OEM harness.

Action

  • Measure the resistance from each of the switch terminals to the engine block ground. Refer to Procedure 019-027.
OK NOT OK

More than 100k ohms

Replace diagnostic switch. Refer to the OEM repair manual.

Guided Step 2I – Check clutch switch for short circuit to ground.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the clutch switch from the OEM harness.

Action

  • Measure the resistance from each of the switch terminals to the engine block ground. Refer to Procedure 019-009.
OK NOT OK

More than 100k ohms

Replace clutch switch. Refer to the OEM repair manual.

Guided Step 3 – Check signal wires.

Guided Step 3A – Check pins 2, 4, 5, 6, 9, 12, 13, 14, 21, 22, and 23 for short circuit to ground.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the OEM harness connector from the ECM.

Action

  • Measure the resistance from pins 2, 4, 5, 6, 9, 12, 13, 14, 21, 22, and 23 for short circuit to ground.
OK NOT OK

More than 100k ohms

Repair or replace the OEM harness.

  • Repair the OEM harness. Refer to Procedure 019-203.
  • Replace the OEM harness. Refer to Procedure 019-071.

 CAUTION 

To reduce the possibility of pin and harness damage, use the following test lead when taking a measurement:
Part Number 3822758 – male Deutsch/AMP/Metri-Pack test lead.
Guided Step 3B – Check pin 10 for short circuit to ground.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the OEM harness connector from the ECM.

Action

  • Measure the resistance from pin 10 in the OEM harness connector to engine block ground.
OK NOT OK

More than 100k ohms

Repair or replace the OEM harness.

  • Repair the OEM harness. Refer to Procedure 019-203.
  • Replace the OEM harness. Refer to Procedure 019-071.

Guided Step 4 – Check for a short circuit from pin to pin.

 CAUTION 

To reduce the possibility of pin and harness damage, use the following test lead when taking a measurement:
Part Number 3822758 – male Deutsch/AMP/Metri-Pack test lead.
Guided Step 4A – Measure resistance from pins 2, 4, 5, 6, 9, 10, 12, 13, 14, 15, 21, 22, and 23 to pins 7, 19, 24, and 26 in the OEM connector.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the OEM harness connector from the ECM.
  • Disconnect all sensors.

Action

  • Measure the resistance from pins 2, 4, 5, 6, 9, 10, 12, 13, 14, 15, 21, 22, and 23 to pins 7, 19, 24, and 26 in the OEM connector.
OK NOT OK

More than 100k ohms

Repair or replace the OEM harness.

  • Repair the OEM harness. Refer to Procedure 019-203.
  • Replace the OEM harness. Refer to Procedure 019-071.

Guided Step 5 – Clear the fault codes.

Guided Step 5A – Disable the fault code.

Conditions

  • Connect all the components.

Action

  • Start the engine and idle for one minute.
  • Verify Fault Codes 352 and 431 are inactive.
OK NOT OK

Fault Codes 352 and 431 inactive

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

Guided Step 5B – Clear the inactive fault codes.

Conditions

  • Connect all the components.

Action

Erase the inactive fault codes using INSITE™ electronic service tool.
OK NOT OK

All fault codes cleared

Troubleshoot any remaining active fault codes.
Repair complete
Appropriate troubleshooting chart
Last Modified:  09-Sep-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.