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Electronic Control System Gas Plus Engines – FAULT CODE 513bgi

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 (short to ground detected at the Electronic Control Module (ECM)).

Possible reduced performance.

Throttle Plate Position Sensor Circuit
SMALL | MEDIUM | LARGE

Circuit Description

The throttle plate position sensor is used by the electronic control module (ECM) to measure the percentage of throttle plate opening.

Component Location

The throttle plate position sensor is installed on top of the throttle body.

Shop Talk

Check to make sure that throttle linkage moves smoothly and freely.

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 plate position sensor and circuit.  
  STEP 2A. Inspect the throttle plate position sensor and connector pins. Dirty or damaged pins?
  STEP 2B. Check for a short to ground. Greater than 100K ohms?
STEP 3. Check the engine control module and engine harness.  
  STEP 3A. Inspect the engine control module 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 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

Inactive or intermittent fault code.

Refer to Procedure 019-362.

 No Repair

Guided Step 2 – Check the throttle plate position sensor and circuit.

Guided Step 2A – Inspect the throttle plate position sensor and connector pins.

Conditions

  • Turn keyswitch OFF
  • Disconnect the throttle plate position sensor from the engine harness.

Action

Inspect the engine harness and throttle posiition sensor connector pins for the following:

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

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.

Clean the connector and pins.

  • Repair the damaged harness, connector or pins if possible.
  • 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 019-121.
 No Repair

Guided Step 2B – Check for a short to ground in the throttle plate position sensor.

Conditions

  • Keyswitch in OFF position.
  • Disconnect the throttle plate position sensor from the engine harness.

Action

Check for a throttle plate position sensor (+) short to ground.

  • Measure the resistance between the throttle plate position sensor supply pin and ground at the throttle plate position sensor connector.

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

Greater than 100K ohms?
YES NO
No Repair

Replace the throttle plate position sensor. Refer to Procedure 019-121.

Guided Step 3 – Check the engine control module and engine harness.

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

Conditions

  • Turn keyswitch OFF
  • Disconnect engine harness connector 1 and 2 from the engine control module.

Action

Inspect the engine harness and engine control module connector 1 pins for the following:

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

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

Conditions

  • Turn keyswitch OFF
  • Disconnect engine harness connector 1 and connector 2 from the engine control module.
  • Disconnect the throttle plate position sensor from the engine harness.

Action

Check for an open circuit.

  • Measure the resistance between the engine harness control module engine connector 1 throttle plate position sensor SIGNAL pin and the throttle plate position sensor connector SIGNAL pin for the engine harness.
  • Measure the resistance between the engine harness engine control module engine connector 2 throttle plate position sensor 5-VDC SUPPLY pin and the throttle plate position sensor connector 5-VDC SUPPLY pin of the engine harness.

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

Less than 10 ohms?
YES NO
No Repair

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

  • Repair or replace the engine harness.
  • Repair the harness. Refer to Procedure 019-204.
  • Replace the engine harness. Refer to Procedure 019-043.

Guided Step 3C – Check for a Pin Short Circuit to Ground

Conditions

  • Turn keyswitch OFF
  • Disconnect engine harness connector 1 and connector 2 from the engine control module.
  • Disconnect the throttle plate position sensor from the engine harness.

Action

Check for a pin to ground short.

  • Measure the resistance between the throttle plate position sensor 5-VDC SUPPLY pin in the engine harness engine control module engine connector 2 and ground.
  • Measure the resistance between the throttle position Signal pin in the engine harness engine control module engine connector 1 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 has been detected in the engine harness.

  • Repair or replace the engine harness.
  • Repair the harness. Refer to Procedure 019-204.
  • Replace the engine 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 engine control module.
  • Disconnect the throttle plate position sensor from the engine harness.

Action

Check for a pin to pin short.

  • Measure the resistance between the throttle plate position sensor 5-VDC 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 throttle position sensor 5-VDC SUPPLY pin in the engine harness engine control module engine connector 2 and ground and all other pins in the engine connector 1.
  • Measure the resistance between the throttle position SIGNAL pin in the engine harness engine control module engine connector 1 and all other pins in the engine connector 1.
  • Measure the resistance between the throttle position SIGNAL pin in the engine harness engine control module engine connector 1 and all other pins in the engine connector 2.

Refer to circuit art 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 plate position sensor command 5-VDC SUPPLY line or position SIGNAL line has been detected in the engine harness.

  • Repair or replace the engine harness.
  • 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 the 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

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

Call for pre-authorization.

Replace the ECM.

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 the INSITE™ electronic service tool.

Action

Disable the fault code.

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

Fault Code 513 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 4B – Clear the inactive fault codes.

Conditions

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

Action

Clear the inactive fault codes.

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

All fault codes cleared?
YES NO
No Repair

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