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FAULT CODE 414

Datalink Circuit – Vehicle

Overview

CODE REASON EFFECT
Fault Code: 414
PID: S250
SPN: 
FMI: 9
LAMP: Yellow
SRT: 00-609

Data transmission error on vehicle data link pins 27 and 8 of OEM harness.

Electronic service tool does not work properly.

Vehicle Datalink Circuit
SMALL | MEDIUM | LARGE

Circuit Description

The vehicle data link allows the service tool to communicate with the electronic control module (ECM). The vehicle data link can also be used to communicate electronically with other onboard electronic devices such as electronic dashboards, trip recorders, and so on using the SAE J1587 communication protocol. The vehicle data link connector can be any one of the following: 2-pin Packard, 6-pin Deutsch, or 8-pin AMP.

Component Location

The vehicle data link connector is located on the OEM wiring harness. Consult the OEM manual for exact location and type of connector. Connector type can be any one of the following:

  • 2-pin Packard
  • 6-pin Deutsch
  • 8-pin AMP.

Shop Talk

Possible causes for this code include electromagnetic induction from control devices on circuit, supply wire on connectors, electromagnetic induction due to poor or no electromagnetic induction grounding, return wire short to chassis ground, supply wire short to chassis ground, data link wires (+/-) shorted together, reversed wires, supply wires shorted to other wires, improper voltage on data link wires, and moisture in OEM port shorting circuit.

Cautions and Warnings

 CAUTION 

The vehicle data link does not broadcast SAE J1587 communication protocol and must no be used for the Compulink™ unit or the Echeck™ unit.
 CAUTION 

To reduce the possibility of pin and harness damage, use the following test leads when taking a measurement:
Part Number 3822758 – male AMP test lead
Part Number 3822917 – female AMP test lead
Part Number 3823993 – male Deutsch test lead
Part Number 3823994 – female Deutsch test lead
Part Number 3823995 – male Weather-Pack test lead
Part Number 3823996 – female Weather-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.

Troubleshooting Steps

STEPS SPECIFICATIONS
STEP 1. Check vehicle items.  
  STEP 1A. Check for possible sources of interference. Fault Code 414 active
  STEP 1B. Inspect 2-pin vehicle data link connector on both sensor side and harness side. No damaged pins
  STEP 1C. Check for any control devices connected to vehicle data link. Fault Code 414 active
  STEP 1D. Check OEM wiring. Fault Code 414 active
STEP 2. Check OEM harness and ECM.  
  STEP 2A. Check for reversed wires. Pin A: 4 to 5 VDC, Pin B: 0 to 1 VDC
  STEP 2A-1. Check voltage at ECM receptacle.
  STEP 2B. Inspect the OEM harness and the ECM connector pins. No damaged pins
  STEP 2C. Check for short circuit between vehicle data link circuit and any other wires in OEM harness. More than 100k ohms
  STEP 2D. Check for short circuit to ground. More than 100k ohms
  STEP 2E. Check for open circuit in the vehicle data link circuit. Less than 10 ohms
STEP 3. Clear the fault codes.  
  STEP 3A. Disable the fault code. Fault Code 414 inactive
  STEP 3B. Clear the inactive fault codes. All fault codes cleared

Guided Step 1 – Check vehicle items.

Guided Step 1A – Check for possible sources of interference.

Conditions

  • Turn keyswitch OFF.

Action

  • Turn off citizens band radio or other radio devices and make sure that ground lines are isolated from the CELECT™ system.

Note: Make sure that the power and ground lines of the radio devices are isolated from the CELECT™ system.
OK NOT OK

Fault Code 414 active

Fault Code 414 inactive.

Guided Step 1B – Inspect 2-pin vehicle data link connector on both sensor side and harness side.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the OEM harness from the 2-pin vehicle data link connector.

Action

  • Bent or broken pins
  • Pushed back or expanded pins
  • Corroded pins
  • Moisture in or on the connector
  • Missing or damaged seals.
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 connector. Refer to Procedure 019-201, 019-202, or 019-205.
  • Replace the OEM harness. Refer to Procedure 019-071.
  • Replace or repair the OEM harness. Refer to OEM service manual.

Guided Step 1C – Check for any control devices connected to vehicle data link.

Conditions

  • Turn keyswitch OFF.

Action

  • Disconnect any onboard electronic devices, such as electronic dashboard, trip recorders, and so on, connected to the data link.
OK NOT OK

Fault Code 414 active

Fault Code 414 inactive.

Guided Step 1D – Check OEM wiring.

Conditions

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

Action

  • Connect a “Dyno Controller,” Part Number 3823948, to the OEM port of the ECM.
  • Connect INSITE™.
  • Start engine and monitor fault codes.

Note: If a “Dyno Controller” is not available, install two jumper wires with 2-pin Weather-Pack plug on one end to the corresponding pins in the ECM: Pin A to pin 27 and pin B to pin 8 on the OEM harness.
OK NOT OK

Fault Code 414 active

Guided Step 2 – Check OEM harness and ECM.

 CAUTION 

To reduce the possibility of damaging the new ECM, all other active fault codes must be investigated prior to replacing the ECM.
Guided Step 2A – Check for reversed wires.

Conditions

  • Disconnect OEM harness from the vehicle data link connector.
  • Turn keyswitch ON.

Action

  • Measure voltage from pin A on OEM harness side to engine block ground.
  • Measure voltage from pin B on OEM harness side to engine block ground.
OK NOT OK

Pin A: 4 to 5 VDC, Pin B: 0 to 1 VDC

Out of specifications.

 CAUTION 

To reduce the possibility of damaging the new ECM, all other active fault codes must be investigated prior to replacing the ECM.
Guided Step 2A-1 – Check voltage at ECM receptacle.

Conditions

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

Action

  • Measure voltage from pin 27 to engine block ground.
  • Measure voltage from pin 8 to engine block ground.
OK NOT OK

Pin 27: 4 to 5 VDC, Pin 8: 0 to 1 VDC

Replace ECM. Refer to Procedure 019-031.

 CAUTION 

To reduce the possibility of damaging the new ECM, all other active fault codes must be investigated prior to replacing the ECM.
Guided Step 2B – Inspect the OEM harness and the ECM connector pins.

Conditions

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

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 connector. Refer to Procedure 019-203.
  • Replace the OEM harness. Refer to Procedure 019-071.
  • Replace the ECM. Refer to Procedure 019-031.

Guided Step 2C – Check for short circuit between vehicle data link circuit and any other wires in OEM harness.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the OEM harness from the ECM.
  • Disconnect the OEM harness from the vehicle data link circuit.

Action

  • Measure the resistance from pin 27 to any other wires in the OEM harness connector.
  • Measure the resistance from pin 8 to any other wires in the OEM harness 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 2D – Check for short circuit to ground.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the OEM harness from the ECM.
  • Disconnect the OEM harness from the vehicle data link circuit.

Action

  • Measure the resistance from pin 27 to engine block ground.
  • Measure the resistance from pin 8 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 2E – Check for open circuit in the vehicle data link circuit.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the OEM harness from the ECM.
  • Disconnect the OEM harness from the vehicle data link circuit.

Action

  • Measure resistance from pin 27 of the AMP connector on the harness side to pin A of the vehicle data link connector on the harness side.
  • Measure resistance from pin 08 of the AMP connector on the harness side to pin B of the vehicle data link connector on the harness side.
OK NOT OK

Less than 10 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 3 – Clear the fault codes.

Guided Step 3A – Disable the fault code.

Conditions

  • Connect all the components.

Action

  • Start the engine and let it idle for 1 minute.
  • Verify Fault Code 414 is inactive.
OK NOT OK

Fault Code 414 inactive

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

Guided Step 3B – Clear the inactive fault codes.

Conditions

  • Connect all the components.

Action

  • Erase the inactive fault codes using INSITE™.
OK NOT OK

All fault codes cleared

Troubleshoot any remaining active fault codes.
Repair Complete
Appropriate troubleshooting chart
Last Modified:  29-Oct-2003
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Published by Jack

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