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Electronic Control System Gas Plus Engines – FAULT CODE 585

Starter Relay Circuit – Shorted Low

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Overview

CODE REASON EFFECT
Fault Code: 585
PID: S039
SPN: 677
FMI: 4/4
LAMP: Amber
SRT: 

Starter relay circuit – Shorted low. Low voltage detected at starter lockout circuit.

The engine will not have starter lockout protection.

Starter Relay Circuit
SMALL | MEDIUM | LARGE

Circuit Description

The starter lockout relay is controlled by the Electronic Control Module
(ECM) through the starter lockout relay signal circuit. The relay prevents the starter from being engaged when the engine is running. The relay return circuit is dependent on Original Equipment Manufacturer (OEM) wiring. It is wired to chassis or block ground. Consult the OEM wiring diagram for return circuit details.

Component Location

The starter lockout relay is installed by the vehicle OEM. Consult the OEM service manual for exact location.

Shop Talk

The ECM monitors the voltage level on this circuit. If it detects a low voltage when the signal is commanded on, it records this fault code. This fault can be caused by:

  • A short circuit to ground in the starter lockout relay, OEM harness, or connectors.

Cautions and Warnings

 CAUTION 

To reduce the possibility of damaging a 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 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.

Troubleshooting Steps

STEPS SPECIFICATIONS
STEP 1. Check the fault codes.  
  STEP 1A. Check for an active fault code. Fault Code 585 active?
STEP 2. Check the starter lockout relay and circuit.  
  STEP 2A. Check the starter lockout relay resistance. Greater than 6 ohms?
  STEP 2B. Check for a pin-to-ground short circuit in the starter lockout relay. Greater than a 100K ohms
STEP 3. Check the OEM harness.  
  STEP 3A. Inspect the ECM and OEM harness connector pins. Dirty or damaged pins?
  STEP 3B. Check for a short circuit to ground in the OEM harness. Greater than 100K ohms?
  STEP 3C. Check for a pin-to-pin short circuit in the OEM harness. Greater than 100k ohms?
STEP 4. Check engine control module and engine harness  
  STEP 4A. Inspect engine control module and engine harness connector pins. Dirty or damaged pins?
  STEP 4B. Check for a pin-to-pin short circuit in the engine and OEM harness. Greater than 100K ohms?
  STEP 4C. Check for a pin short circuit to ground. Greater than 100K ohms?
  STEP 4D. Check for an inactive fault code. Fault Code 585 inactive?
STEP 5. Clear the fault codes.  
  STEP 5A. Disable the fault codes. Fault code 585 inactive?
  STEP 5B. Clear the inactive fault codes. All fault codes cleared?

Guided Step 1 – Check the fault codes.

Guided Step 1A – Check for an active fault code.

Conditions

  • Turn keyswitch ON.
  • Connect INSITE™ electronic service tool.

Action

Check for an active fault code.

  • Use INSITE™ electronic service tool to read the fault codes.

Fault Code 585 active?
YES NO
No Repair

Inactive or intermittent fault code, refer to Procedure 019-362.

Guided Step 2 – Check the starter lockout relay and circuit.

Guided Step 2A – Check starter lockout relay resistance.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the starter lockout relay from the OEM harness.

Action

Measure the resistance of the relay coil and check for low resistance between the starter lockout relay signal pin and the relay return pin.

For general resistance measurement techniques, refer to Resistance Measurements Using a Multimeter and Wiring Diagram, Procedure 019-360

Greater than 6 ohms?
YES NO
No Repair

Replace the starter lockout relay.

Use the OEM troubleshooting and repair manual.

Guided Step 2B – Check for a pin-to-ground short circuit in the starter lockout relay.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the starter lockout relay from the OEM harness.

Action

Check the starter lockout relay resistance.

  • Measure the resistance and check for a short circuit between the starter lockout relay signal pin and ground.

For general resistance measurement techniques, refer to Resistance Measurements Using a Multimeter and Wiring Diagram, Procedure 019-360

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Greater than 100K ohms?

YES NO
No Repair

Replace the starter lockout relay.

See the OEM troubleshooting and repair manual.

Guided Step 3 – Check the OEM harness.

Guided Step 3A – Inspect the ECM and OEM harness connector pins.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the OEM harness from the 31 pin OEM connector.

Action

Inspect the OEM harness and ECM connector pins for the following:

  • Corroded pins
  • Bent or broken pins
  • Pushed back or expanded pins
  • Moisture in or on the connector
  • Missing or damaged connector seals
  • Dirt or debris in or on the connector pins.
  • Wire insulation damage
  • Connector shell broken

For general inspection techniques, refer to Component Connector and Pin Inspection, Procedure 019-361.

Dirty or damaged pins?
YES NO

Clean the connector and pins.

Repair the damaged harness, connector, or pins, if possible.

 No Repair

Guided Step 3B – Check for a short circuit to ground in the OEM harness.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the starter lockout relay from the OEM harness.
  • Disconnect the OEM harness from the 31 pin OEM connector.

Action

Check for a short circuit to ground in the OEM harness..

  • Measure the resistance between the starter lockout relay SIGNAL pin n the OEM harness ECM connector and ground.

Refer to circuit description or circuit diagram for connector pin identification.

For general resistance measurement techniques, refer to Resistance Measurements Using a Multimeter and Wiring Diagram, Procedure 019-360

SMALL | MEDIUM | LARGE

Greater than 100K ohms?
YES NO
No Repair

Repair or replace the OEM harness.

Refer to Procedure 019-071.

Guided Step 3C – Check for a pin-to-in short circuit in the OEM harness.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the OEM harness from the 31 Pin OEM connector.
  • Disconnect the starter lockout relay from the OEM harness.

Action

Measure the resistance and check for a short circuit between the starter lockout relay SIGNAL pin and all other pns in the OEM harness ECM connector.

See the wiring diagram for connector pin identification.

For general resistance measurement techniques, refer to Resistance Measurements Using a Multimeter and Wiring Diagram, Procedure 019-360

SMALL | MEDIUM | LARGE

Greater than 100k ohms?
YES NO
No Repair

Repair or replace the OEM harness.

Guided Step 4 – Check engine control module and engine harness.

Guided Step 4A – Inspect engine control module and engine harness connector pin.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the engine harness connector 2 from the engine control module.

Action

Inspect the engine harness and engine control module connectors pins for the following:

  • Corroded pins
  • Bent or broken pins
  • Pushed back or expanded pins
  • Moisture in or on the connector
  • Missing or damaged connector seals
  • Dirt or debris in or on the connector pins.
  • Wire insulation damage
  • Connector shell broken

For general inspection techniques, refer to Component Connector and Pin Inspection, Procedure 019-361.

Dirty or damaged pins?
YES NO

A defective connection has been detected in the engine control module connectors or engine harness connector.

Clean the connector and pins.

Repair the damaged harness, connector, or pins, if possible.

Repair the harness. Refer to Procedure 019-204.

Replace the harness. Refer to Procedure 019-043.

No Repair

Guided Step 4B – Check for a pin-to-pin short in the engine and OEM harness.

Conditions

  • Turn keyswitch ON.
  • Disconnect the engine harness connector 1 and connector 2 from the engine control module.
  • Disconnect 31 Pin OEM connector.

Action

Check for a pin-to-pin short.

  • Measure the resistance between the starter lockout SUPPLY pin in the engine harness engine control module engine connector 2 and all other pins in the engine connector 2.
  • Measure the resistance between the starter lockout sensor SUPPLY pin in the engine harness engine control module engine connector 2 and all other pins in the connector 1.

Refer to circuit description or circuit diagram for connector pin identification.

For general resistance measurement techniques, refer to Resistance Measurements Using a Multimeter and Wiring Diagram, Procedure 019-360

SMALL | MEDIUM | LARGE

Greater than 100K ohms?
YES NO
No Repair

A pin-to-pin short circuit on the Starter lockout supply line has been detected in the engine harness.

Repair or replace the engine harness.

Refer to Procedure 019-204.

Refer to Procedure 019-043.

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

Conditions

  • Turn keyswitch OFF.
  • Disconnect the engine harness connector 2 from the engine control module.
  • Disconnect 31 Pin OEM connector.

Action

Check for a pin-to-pin short.

  • Measure the resistance between the starter lockout SUPPLY pin in the engine harness engine control module engine connector 2 and ground.

Refer to circuit description or circuit diagram for connector pin identification.

For general resistance measurement techniques, refer to Resistance Measurements Using a Multimeter and Wiring Diagram, Procedure 019-360

Greater than 100K ohms?
YES NO
No Repair

A pin-to-ground short circuit on the sensor supply number 1 line has been detected in the engine harness.

Repair or replace the engine harness.

Refer to Procedure 019-204.

Refer to Procedure 019-043.

Guided Step 4D – Check for an inactive fault code.

Conditions

  • Connect all components.
  • Turn keyswitch ON.
  • Connect INSITE™ electronic service tool.

Action

Check for the appropriate circuit response after 30 seconds.

  • Use INSITE™ electronic service tool to read the fault codes.

Fault Code 585 inactive?
YES NO

None. The removal and reinstallation of the connector corrected the failure.

Call for pre-authorization. Replace the Electronic Control Module (ECM).

Refer to Procedure 019-031.

Guided Step 5 – Clear the fault code.

Guided Step 5A – Disable the fault code.

Conditions

  • Connect all components.
  • Connect INSITE™ electronic service tool.

Action

Disable the fault code.

  • Start the engine and let it idle for 1 minute.
  • Use INSITE™ electronic service tool to verify the fault code is inactive.

Fault Code 585 inactive?
YES NO
No Repair

Return to the troubleshooting steps or contact a local Cummins Authorized Repair location if all steps have been completed and rechecked.

Guided Step 5B – Clear inactive fault code.

Conditions

  • Connect all components
  • Turn keyswitch ON.
  • Connect INSITE™ electronic service tool.

Action

Clear the inactive fault code.

  • Erase the inactive fault codes using INSITE™ electronic service tool.

All fault codes cleared?
YES NO
No Repair

Troubleshoot any remaining fault codes.
Repair complete
Appropriate troubleshooting steps
Last Modified:  07-Dec-2004
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Published by Jack

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