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FAULT CODE Multiple A

Fault Codes 123, 141, 145, 154, 213, 222, 352, and 422

Overview

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

Low voltage detected on the internal electronic control module (ECM)
supply line to the sensors.

Sensors will not operate correctly.

Sensor Supply Voltage Circuit
SMALL | MEDIUM | LARGE

Circuit Description

The ECM supplies each sensor in the sensor harness with +5 VDC. If the supply line to any sensor is damaged, the sensor will not work correctly.

Component Location

  • Intake manifold pressure sensor
  • Ambient air temperature
  • Coolant temperature
  • Intake manifold air temperature
  • Oil pressure
  • Oil temperature
  • Coolant level sensor.

Shop Talk

Low voltage on the sensor +5 VDC supply line will be caused by a short to ground in a supply line, a short circuit between a supply line or a return line, a failed sensor, or a failed ECM power supply.

Cautions and Warnings

 WARNING 

Do not remove the pressure cap from a hot engine. Wait until the coolant temperature is below 50°C [120°F] before removing the pressure cap. Heated coolant spray or steam can cause personal injury.
 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 for the failed sensors.  
  STEP 1A. Check the coolant temperature sensor. Fault Code 352 active
  STEP 1B. Check the intake manifold pressure sensor. Less than 4.5 VDC
  STEP 1C. Check the oil pressure sensor. Less than 4.5 VDC
  STEP 1D. Check the ambient air pressure sensor. Less than 4.5 VDC
  STEP 1E. Check the intake manifold temperature sensor. Less than 4.5 VDC
  STEP 1F. Check the oil temperature sensor. Less than 4.5 VDC
STEP 2. Check the coolant level sensor circuit.  
  STEP 2A. Inspect the coolant level sensor and the OEM harness connector pins. No damaged pins
  STEP 2B. Inspect the OEM harness and engine harness 9-pin connector. No damaged pins
  STEP 2C. Read the fault codes. Fault Codes 123, 141, 145, 154, 213, 222, 352, and 422 are active
STEP 3. Check the sensor harness.  
  STEP 3A. Inspect the harness and the ECM connector pins. No damaged pins
  STEP 3B. Read the fault codes. Fault Codes 123, 141, 145, 154, 213, 222, 352, and 422 are active
  STEP 3C. Check the supply voltage. 4.75 to 5.25 VDC
  STEP 3D. Check for a short circuit to ground in the sensor supply lines. More than 100k ohms
  STEP 3E. Check for a short circuit from pin to pin. More than 100k ohms
STEP 4. Clear the fault codes.  
  STEP 4A. Disable the fault code. Fault Codes 123, 141, 145, 154, 213, 222, 352, and 422 inactive
  STEP 4B. Clear the inactive fault codes. All fault codes cleared

Guided Step 1 – Check for the failed sensors.

Guided Step 1A – Check the coolant temperature sensor.

Conditions

  • Disconnect the sensor harness from the coolant temperature sensor.

Action

  • Start the engine and let it idle for 1 minute.
  • Verify Fault Code 352 is still active.
OK NOT OK

Fault Code 352 active

Replace the coolant temperature sensor. Refer to Procedure 019-019.

 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.
Guided Step 1B – Check the intake manifold pressure sensor.

Conditions

  • Disconnect the sensor harness from the intake manifold pressure sensor.
  • Turn keyswitch ON.

Action

  • Measure the voltage from pin A to pin B on the intake manifold pressure sensor connector.
SMALL | MEDIUM | LARGE
OK NOT OK

Less than 4.5 VDC

Replace the intake manifold pressure sensor. Refer to Procedure 019-061.

 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.
Guided Step 1C – Check the oil pressure sensor.

Conditions

  • Disconnect the sensor harness from the coolant level sensor.
  • Disconnect the sensor harness from the oil pressure sensor.
  • Connect the sensor harness to the intake manifold pressure sensor.
  • Turn keyswitch ON.

Action

  • Measure the voltage from pin A to pin B on the oil pressure sensor connector.
SMALL | MEDIUM | LARGE
OK NOT OK

Less than 4.5 VDC

Replace the oil pressure sensor. Refer to Procedure 019-066.

 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.
Guided Step 1D – Check the ambient air pressure sensor.

Conditions

  • Disconnect the sensor harness from the ambient air pressure sensor.
  • Turn keyswitch ON.

Action

  • Measure the voltage from pin A to pin B on the ambient air pressure sensor connector.
SMALL | MEDIUM | LARGE
OK NOT OK

Less than 4.5 VDC

Replace the ambient air pressure sensor. Refer to Procedure 019-004.

 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.
Guided Step 1E – Check the intake manifold temperature sensor.

Conditions

  • Disconnect the sensor harness from the intake manifold temperature sensor.
  • Turn keyswitch ON.

Action

  • Measure the voltage from pin A to pin B on the intake manifold temperature sensor connector.
SMALL | MEDIUM | LARGE
OK NOT OK

Less than 4.5 VDC

Replace the intake manifold temperature sensor. Refer to Procedure 019-059.

 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.
Guided Step 1F – Check the oil temperature sensor.

Conditions

  • Disconnect the sensor harness from the coolant level sensor.
  • Disconnect the sensor harness from the oil temperature sensor.
  • Turn keyswitch ON.

Action

  • Measure the voltage from pin A to pin B on the oil temperature sensor connector.
SMALL | MEDIUM | LARGE
OK NOT OK

Less than 4.5 VDC

Replace the oil temperature sensor. Refer to Procedure 019-067.

Guided Step 2 – Check the coolant level sensor circuit.

Guided Step 2A – Inspect the coolant level sensor and the OEM harness connector pins.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the OEM harness from the coolant level sensor.
  • Flush and clean the connector pins 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 019-201.
  • Replace the OEM harness. Refer to the OEM troubleshooting and repair manual.
  • Replace the coolant level sensor. Refer to the OEM troubleshooting and repair manual.

Guided Step 2B – Inspect the OEM harness and engine harness 9-pin connector pins.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the sensor harness from the OEM harness at the 9-pin Deutsch connector.
  • Flush and clean the connector pins 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 or replace the damaged harness.

  • Repair the damaged pins. Refer to Procedure 019-207.
  • Replace the OEM harness. Refer to Procedure 019-071.
  • Replace the engine harness. Refer to Procedure 019-043.

 WARNING 

Do not remove the pressure cap from a hot engine. Wait until the coolant temperature is below 50°C [120°F] before removing the pressure cap. Heated coolant spray or steam can cause personal injury.
Guided Step 2C – Read the fault codes.

Conditions

  • Disconnect the OEM harness from the engine harness 9-pin connector.
  • Turn keyswitch ON.

Action

  • Remove pins A, J, C, and B of the OEM harness 9-pin connector.
  • Install a jumper wire between pins A and C of the OEM harness 9-pin connector.
  • Install a jumper wire between pins J and B of the OEM harness 9-pin connector.
  • Connect the OEM harness to the engine harness at the 9-pin connector.
  • Start the engine and let it idle for 1 minute.
  • Read the fault codes using INSITE™.
OK NOT OK

Fault Codes 123, 141, 145, 154, 213, 222, 352, and 422 are active

Repair or replace the OEM harness, coolant level sensor, or shorting plug, whichever is faulty. Refer to the OEM troubleshooting and repair manual.

Guided Step 3 – Check the sensor harness.

 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 3A – Inspect harness and the ECM connector pins.

Conditions

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

Action

  • Bent 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 engine harness. Refer to Procedure 019-203.
  • Replace the engine harness. Refer to Procedure 019-043.
  • 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 3B – Read the fault codes.

Conditions

  • Connect all components.
  • Turn keyswitch ON.

Action

  • Start the engine and let it idle for 1 minute.
  • Read the fault codes using INSITE™.
OK NOT OK

Fault Codes 123, 141, 145, 154, 213, 222, 352, and 422 are 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 3C – Check the supply voltage.

Conditions

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

Action

  • Measure the supply voltage from the ECM sensor port pins 2, 3, 5, 12, 21, and 22 to ground.
SMALL | MEDIUM | LARGE
OK NOT OK

4.75 to 5.25 VDC

Replace the ECM. Refer to Procedure 019-031.

 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 3D – Check for a short circuit to ground in the sensor supply lines.

Conditions

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

Action

  • Measure the resistance from pins 2, 3, 5, 12, 21, and 22 in the sensor harness connector to engine block ground.
SMALL | MEDIUM | LARGE
OK NOT OK

More than 100k ohms

Repair or replace the engine harness.

  • Repair the engine harness. Refer to Procedure 019-203.
  • Replace the engine harness. Refer to Procedure 019-043.

 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 3E – Check for a short circuit from pin to pin.

Conditions

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

Action

  • Measure the resistance from pins 2, 3, 5, 12, 21, and 22 to all other pins in the sensor harness connector.
SMALL | MEDIUM | LARGE
OK NOT OK

More than 100k ohms

Repair or replace the engine harness.

  • Repair the engine harness. Refer to Procedure 019-203.
  • Replace the engine harness. Refer to Procedure 019-043.

Guided Step 4 – Clear the fault codes.

Guided Step 4A – Disable the fault code.

Conditions

  • Connect all the components.

Action

  • Start the engine and idle for 1 minute.
  • Verify Fault Codes 123, 141, 145, 154, 213, 222, 352, and 422 are inactive.
OK NOT OK

Fault Codes 123, 141, 145, 154, 213, 222, 352, and 422 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 4B – 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:  18-Nov-2003
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