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Electronic Control System Gas Plus Engines – FAULT CODE 513gp

Throttle Plate Position Sensor Circuit – Shorted Low

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Overview

CODE REASON EFFECT
Fault Code: 513
PID: P51
SPN: 51
FMI: 4
LAMP: Amber
SRT: 

Throttle Plate Position Sensor Circuit – Shorted Low. Low voltage (shorted to ground) detected at the ECM.

Possible reduced performance.

Electronic Throttle Control Actuator Circuit
SMALL | MEDIUM | LARGE

Circuit Description

The electronic control module (ECM) controls the throttle actuator, which is both an input and output device.

Component Location

The throttle actuator is located after the fuel housing and before the intake manifold inlet.

Shop Talk

The fault will light if the throttle actuator has low voltage on the switched battery and this is detected by the ECM.

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 3823995 – male Weather-Pack test lead.

Troubleshooting Steps

STEPS SPECIFICATIONS
STEP 1. Check the fault codes.  
  STEP 1A. Check for an inactive fault code. Fault Code 513 inactive?
STEP 2. Check the throttle actuator and circuit.  
  STEP 2A. Inspect the throttle actuator and connector pins. Dirty or damaged pins?
  STEP 2B. Check the throttle actuator battery voltage and ground. 12-VDC?
  STEP 2C. Check the resistance in the switched battery and ground. 100k ohms?
STEP 3. Check the ECM and engine harness.  
  STEP 3A. Inspect the ECM and engine harness connector pins. Dirty or damaged pins?
  STEP 3B. Check for an open circuit in the engine harness. Less than 10 ohms?
  STEP 3B-1. Check for an open circuit in the engine harness.
  STEP 3C. Check for a pin short circuit to ground. Greater than 100k ohms?
  STEP 3D. Check for a pin-to-pin short circuit in the engine harness. Greater than 100k ohms?
  STEP 3E. Check for an inactive fault code. Fault Code 513 inactive?
STEP 4. Clear the fault codes.  
  STEP 4A. Disable the fault code. Fault Code 513 inactive?
  STEP 4B. Clear the inactive fault codes. All fault codes cleared?

Guided Step 1 – Check the fault codes.

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

Conditions

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

Action

Check for an inactive fault code.

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

Fault Code 513 inactive?
YES NO

Refer to Procedure
019-362.

 No Repair

Guided Step 2 – Check the throttle actuator and circuit.

Guided Step 2A – Inspect the throttle actuator and connector pins.

Conditions

  • Turn keyswitch OFF
  • Disconnect the throttle actuator from the engine harness.

Action

Inspect the engine harness and throttle actuator connector pins for the following:

  • Loose connector
  • 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
  • Connector shell broken
  • Wire insulation damage
  • Damaged locking tab connector.

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 sensor or engine harness connector.

Repair the damaged pins. Repair or replace the throttle actuator, or replace the sensor, whichever has the damaged pins.

  • Flush the dirt, debris, or moisture from the connector pins using electronic contact cleaner, Part Number 3824510.
  • Install the appropriate connector seal if it is damaged or missing.
  • Repair the harness. Refer to Procedure
    019-204.
  • Replace the harness. Refer to Procedure
    019-043.
  • Replace the throttle actuator. Refer to Procedure
    005-052 in the Troubleshooting and Repair Manual C8.3G, C Gas Plus and L Gas Plus Engines, Bulletin 3666206 and Procedure
    005-052 in the Troubleshooting and Repair Manual B5.9G, B5.9 LPG, B Gas Plus and B LPG Plus Engines, Bulletin 3666164.
 No Repair

Guided Step 2B – Check the throttle actuator battery voltage and ground.

Conditions

  • Turn keyswitch OFF
  • Using a break-out harness or piercing probes so a load is on the voltage supply
  • Turn keyswitch ON.

Action

Check the throttle actuator battery voltage.

  • Check switched battery voltage on pins A and B for battery voltage (bad fuse or voltage drop will be shown by being hooked to actuator).

Use the circuit diagram or wiring diagram for connector pin identification.

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

12-VDC?
YES NO
No Repair

Determine the root cause for no or insufficient switched battery voltage.

Guided Step 2C – Check the resistance in the throttle actuator battery voltage and ground.

Conditions

  • Turn keyswitch OFF
  • Disconnect the throttle actuator from the engine harness
  • Turn keyswitch ON.

Action

Check the throttle actuator battery voltage to ground.

  • Measure the resistance between the throttle actuator battery voltage pin and ground at the throttle actuator connector.

Use the circuit diagram or wiring 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

Replace the throttle actuator.

Refer to Procedure 005-052 in the Troubleshooting and Repair Manual, C8.3G, C Gas Plus, and L Gas Plus Engines, Bulletin
3666206 and Procedure 005-052 in the Troubleshooting and Repair Manual, B5.9G, B5.9 LPG, B Gas Plus, and B LPG Plus Engines, Bulletin
3666164.

Guided Step 3 – Check the ECM and engine harness.

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

Conditions

  • Turn keyswitch OFF
  • Disconnect engine harness connector 1 from the ECM.

Action

Inspect the engine harness and ECM connector 1 pins for the following:

  • Loose connector
  • 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
  • Connector shell broken
  • Wire insulation damage
  • Damaged locking tab connector.

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 ECM connector 1 or the engine harness.

Repair the damaged pins. Repair or replace the harness, whichever has the damaged pins.

  • Flush the dirt, debris, or moisture from the connector pins using electronic contact cleaner, Part Number 3824510.
  • Install the appropriate connector seal if it is damaged or missing.
  • Repair the harness. Refer to Procedure
    019-204.
  • Replace the harness. Refer to Procedure
    019-043.
No Repair

Guided Step 3B – Check for an open circuit in the engine harness.

Conditions

  • Turn keyswitch OFF
  • Disconnect the engine harness connector 1 from the ECM
  • Disconnect the throttle actuator from the engine harness.

Action

Check for an open circuit.

  • Measure the resistance between the engine harness ECM connector 1 throttle actuator switched battery (+) pin and the throttle actuator connector switched battery (+) pin in the engine harness.
  • Measure the resistance between the engine harness ECM connector 1 throttle actuator RETURN pin and the throttle actuator connector RETURN pin of the engine harness.

Use the circuit diagram or wiring diagram for connector pin identification.

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

Less than 10 ohms?
YES NO
No Repair

A open circuit has been detected in the engine harness.

Repair the damaged pins. Repair or replace the harness, whichever has the damaged pins.

  • Flush the dirt, debris, or moisture from the connector pins using electronic contact cleaner, Part Number 3824510.
  • Install the appropriate connector seal if it is damaged or missing.
  • Repair the harness. Refer to Procedure
    019-204.
  • Replace the harness. Refer to Procedure
    019-043.

Guided Step 3B-1 – Check for an open circuit in the engine harness.

Conditions

  • Turn keyswitch OFF
  • Disconnect the engine harness connector 1 from the ECM
  • Disconnect the throttle actuator from the engine harness.

Action

Check for an open circuit.

  • Measure the resistance between the engine harness ECM connector 1 throttle position (+) pin and the throttle position (+) pin of the engine harness.

Use the circuit diagram or wiring diagram for connector pin identification.

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

Less than 10 ohms?
YES NO
No Repair

A open supply circuit has been detected in the engine harness.

Repair the damaged pins. Repair or replace the harness, whichever has the damaged pins.

  • Flush the dirt, debris, or moisture from the connector pins using electronic contact cleaner, Part Number 3824510.
  • Install the appropriate connector seal if it is damaged or missing.
  • Repair the harness. Refer to Procedure
    019-204.
  • Replace the harness. Refer to Procedure
    019-043.

Guided Step 3C – Check for a pin short circuit to ground.

Conditions

  • Turn keyswitch OFF
  • Disconnect the engine harness connector 1 from the ECM
  • Disconnect the throttle actuator from the engine harness.

Action

Check for a pin to ground short.

  • Measure the resistance between the throttle actuator switched battery (+) pin in the engine harness ECM connector 1 and ground.
  • Measure the resistance between the throttle position (+) pin in the engine harness ECM connector 1 and ground.

Use the circuit diagram or wiring 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 throttle actuator supply or the throttle position signal lines has been detected in the engine harness.

Repair the damaged pins. Repair or replace the harness, whichever has the damaged pins.

  • Flush the dirt, debris, or moisture from the connector pins using electronic contact cleaner, Part Number 3824510.
  • Install the appropriate connector seal if it is damaged or missing.
  • Repair the harness. Refer to Procedure
    019-204.
  • Replace the harness. Refer to Procedure
    019-043.

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

Conditions

  • Turn keyswitch OFF
  • Disconnect engine harness connector 1 and connector 2 from the ICM.
  • Disconnect the throttle actuator from the engine harness.

Action

Check for a pin to pin short circuit.

  • Measure the resistance between the throttle actuator switched battery (+) pin in the engine harness ECM connector 1 and all other pins in the engine connector 1.
  • Measure the resistance between the throttle actuator switched battery (+) pin in the engine harness ECM connector 1 and all other pins in the engine connector 2.
  • Measure the resistance between the throttle position (+) pin in the engine harness ECM connector 1 and all other pins in the engine connector 1.
  • Measure the resistance between the throttle position (+) pin in the engine harness ECM connector 1 and all other pins in the engine connector 2.

Use the circuit diagram or wiring 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-pin short circuit on the throttle actuator command supply line or position signal line has been detected in the engine harness.

Repair or replace the engine harness.

  • Flush the dirt, debris, or moisture from the connector pins using electronic contact cleaner, Part Number 3824510.
  • Install the appropriate connector seal if it is damaged or missing.
  • Repair the harness. Refer to Procedure
    019-204.
  • Replace the engine harness. Refer to Procedure
    019-043.

Guided Step 3E – 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 513 inactive?
YES NO
No Repair

Replace the ECM.

Call for pre-authorization.

Refer to Procedure
019-031.

Guided Step 4 – Clear the fault codes.

Guided Step 4A – Disable the fault code.

Conditions

  • Connect all components
  • Turn keyswitch ON
  • 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 that the fault code is inactive.

Fault Code 513 inactive?
YES NO
No Repair

Return to the troubleshooting steps or contact a Cummins® Authorized Repair location if all steps have been completed and checked again.

Guided Step 4B – Clear the inactive fault codes.

Conditions

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

Action

Clear the inactive fault codes.

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

All fault codes cleared?
YES NO
No Repair

Troubleshoot any remaining fault codes.
Repair complete
Appropriate troubleshooting steps
Last Modified:  11-Sep-2006
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