Fault Codes 123, 141, 145, 154, 213, 222, 352, and 422
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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) |
Sensors will not operate correctly. |
Sensor Supply Voltage Circuit |
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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.
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CAUTION
To reduce the possibility of pin and harness damage, use the following test leads when taking a measurement: |
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: |
CAUTION
To reduce the possibility of pin and harness damage, use the following test lead when taking a measurement: |
Troubleshooting Steps
STEPS | SPECIFICATIONS | |
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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. | |
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Conditions
Action
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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: |
Guided Step 1B – Check the intake manifold pressure sensor. | ||
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Conditions
Action
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OK | NOT OK | |
Less than 4.5 VDC |
Replace the intake manifold pressure sensor. Refer to Procedure 019-061. |
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CAUTION
To reduce the possibility of pin and harness damage, use the following test leads when taking a measurement: |
Guided Step 1C – Check the oil pressure sensor. | ||
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Conditions
Action
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OK | NOT OK | |
Less than 4.5 VDC |
Replace the oil pressure sensor. Refer to Procedure 019-066. |
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CAUTION
To reduce the possibility of pin and harness damage, use the following test leads when taking a measurement: |
Guided Step 1D – Check the ambient air pressure sensor. | ||
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Conditions
Action
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OK | NOT OK | |
Less than 4.5 VDC |
Replace the ambient air pressure sensor. Refer to Procedure 019-004. |
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CAUTION
To reduce the possibility of pin and harness damage, use the following test leads when taking a measurement: |
Guided Step 1E – Check the intake manifold temperature sensor. | ||
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Conditions
Action
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OK | NOT OK | |
Less than 4.5 VDC |
Replace the intake manifold temperature sensor. Refer to Procedure 019-059. |
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CAUTION
To reduce the possibility of pin and harness damage, use the following test leads when taking a measurement: |
Guided Step 1F – Check the oil temperature sensor. | ||
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Conditions
Action
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OK | NOT OK | |
Less than 4.5 VDC |
Replace the oil temperature sensor. Refer to Procedure 019-067. |
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Guided Step 2 – Check the coolant level sensor circuit.
Guided Step 2A – Inspect the coolant level sensor and the OEM harness connector pins. | |
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Conditions
Action
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OK | NOT OK |
No damaged pins |
Repair the damaged pins.
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Guided Step 2B – Inspect the OEM harness and engine harness 9-pin connector pins. | |
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Conditions
Action
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OK | NOT OK |
No damaged pins |
Repair the damaged pins or replace the damaged harness. |
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.
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Guided Step 2C – Read the fault codes. | |
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Conditions
Action
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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. | |
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Conditions
Action
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OK | NOT OK |
No damaged pins |
Repair the damaged pins.
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Guided Step 3B – Read the fault codes. | |
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Conditions
Action
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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: |
Guided Step 3C – Check the supply voltage. | ||
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Conditions
Action
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OK | NOT OK | |
4.75 to 5.25 VDC |
Replace the ECM. Refer to Procedure 019-031. |
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CAUTION
To reduce the possibility of pin and harness damage, use the following test lead when taking a measurement: |
Guided Step 3D – Check for a short circuit to ground in the sensor supply lines. | ||
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Conditions
Action
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OK | NOT OK | |
More than 100k ohms |
Repair or replace the engine harness. |
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CAUTION
To reduce the possibility of pin and harness damage, use the following test lead when taking a measurement: |
Guided Step 3E – Check for a short circuit from pin to pin. | ||
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Conditions
Action
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OK | NOT OK | |
More than 100k ohms |
Repair or replace the engine harness. |
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Guided Step 4 – Clear the fault codes.
Guided Step 4A – Disable the fault code. | |
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Conditions
Action
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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. | |
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Conditions
ActionErase the inactive fault codes using INSITE™. |
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OK | NOT OK |
All fault codes cleared |
Troubleshoot any remaining active fault codes. |
Repair complete
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Appropriate troubleshooting chart
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