5. RESULTADOS
5.2. Contraste e Hipótesis
5.2.5. Prueba de Hipótesis Especifica (d)
CODES REASON EFFECT
Fault Code: 0006 PID(P), SID(S):
FMI:
Lamp:
SRT:
Exhaust Gas Temperature Sensor Number 1 Circuit -Voltage Above Normal, or Shorted to High Source. High signal voltage or open circuit detected at the Exhaust Gas Temperature Sensor circuit.
None on performance.
Exhaust Gas Temperature Sensor Number 1 Circuit
Circuit Description:
The exhaust gas temperature sensor provides the exhaust gas temperature to the exhaust gas treatment monitor unit through the exhaust gas treatment monitor harness.
Component Location:
The exhaust gas temperature sensor will be located near the inlet to the exhaust catalyst. The location will vary depending on application.
Shop Talk:
Possible causes of this fault code include:
• Signal circuit shorted to a voltage source or a shorted sensor.
This fault code will only be present in the exhaust gas treatment monitor unit and will not be present in the engine electronic control module (ECM). The exhaust gas treatment fault code and maintenance lamps will both flash six times in sequence to alert the operator that this condition exists. The engine diagnostic lamps will not illuminate.
TROUBLESHOOTING SUMMARY
STEPS SPECIFICATIONS SRT CODE
STEP 1: Check the exhaust gas temperature sensor and circuit.
STEP 1A: Inspect the exhaust gas temperature sensor and connector pins.
Dirty or damaged pins?
STEP 1B: Check the sensor resistance. 14k ohms to 250k ohms?
STEP 2: Check the exhaust gas treatment monitor unit and exhaust gas treatment monitor harness.
STEP 2A: Inspect the exhaust gas treatment monitor unit and exhaust gas treatment monitor harness connector pins.
Dirty or damaged pins?
STEP 2B: Check for a pin to pin short circuit in the exhaust gas treatment monitor harness.
Greater than 100k ohms?
STEP 2C: Check for fault code presence. Fault Code 0002 present?
STEP 3: Clear the fault code.
STEP 3A: Disable the fault code. Fault Code 0002 present?
TROUBLESHOOTING STEP
STEP 1: Check the exhaust gas temperature sensor and circuit.
STEP 1A: Inspect the exhaust gas temperature sensor and connector pins.
Condition:
• Turn keyswitch OFF
• Disconnect the exhaust gas temperature sensor from the exhaust gas treatment monitor harness.
Action Specification/Repair Next Step
Inspect the exhaust gas treatment monitor harness and exhaust gas temperature sensor 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
• Wire insulation damage
• 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 Repair:
A defective connection has been detected in the sensor or harness connector.
Clean the connector and pins.
Repair the damaged harness, connector or pins if possible.
Refer to Procedure 011-038 in the Troubleshooting and Repair Manual ISC, ISCe, QSC8.3, ISL and QSL9 Engines, Bulletin 4021418.
3A
Dirty or damaged pins?
NO
1B
STEP 1B: Check the sensor resistance.
Condition:
• Turn keyswitch OFF
• Disconnect the exhaust gas temperature sensor from the exhaust gas treatment monitor harness.
Action Specification/Repair Next Step
Check the sensor resistance.
• Measure the resistance between the SIGNAL pin and the RETURN pin at the exhaust gas temperature sensor connector.
14k ohms to 250k ohms?
YES
2A
14k ohms to 250k ohms?
NO Repair:
Replace the exhaust gas temperature sensor. Refer to Procedure 011-037 in the Troubleshooting and Repair Manual ISC, ISCe, QSC8.3, ISL and QSL9 Engines, Bulletin 4021418.
3A
STEP 2: Check the exhaust gas treatment monitor unit and exhaust gas treatment monitor harness.
STEP 2A: Inspect the exhaust gas treatment monitor unit and exhaust gas treatment monitor harness connector pins.
Condition:
• Turn keyswitch OFF
• Disconnect the exhaust gas treatment monitor unit from the exhaust gas treatment monitor harness.
Action Specification/Repair Next Step
Inspect the exhaust gas treatment monitor unit and exhaust gas treatment monitor harness 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
• Wire insulation damage
• 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 Repair:
A defective connection has been detected in the exhaust gas treatment monitor unit connector or exhaust gas treatment monitor harness connector.
Clean the connector and pins.
Repair the damaged harness, connector or pins if possible.
Refer to Procedure 011-038 or Procedure 011-035 in the Troubleshooting and Repair Manual ISC, ISCe, QSC8.3, ISL and QSL9 Engines, Bulletin 4021418.
3A
Dirty or damaged pins?
NO
2B
STEP 2B: Check for a pin to pin short circuit in the exhaust gas treatment monitor harness.
Condition:
• Turn keyswitch OFF
• Disconnect the exhaust gas treatment monitor harness from the exhaust gas treatment monitor unit connector
• Disconnect the exhaust gas temperature sensor from the exhaust gas treatment monitor harness.
Action Specification/Repair Next Step
Check for a pin to pin short.
• Measure the resistance between the exhaust gas temperature sensor SIGNAL pin in the exhaust gas treatment monitor harness exhaust gas treatment monitor unit connector and all other pins in the exhaust gas treatment monitor unit connector.
For general resistance measurement
techniques, refer to Resistance Measurements Using a Multimeter and Wiring Diagram, Procedure 019-360.
Greater than 100k ohms?
YES
2D
Greater than 100k ohms?
NO Repair:
A pin to pin short circuit on the SIGNAL line has been detected in the exhaust gas treatment monitor harness.
Troubleshoot each harness connected in series to determine which contains the pin to pin short circuit.
Repair or replace the exhaust gas treatment monitor harness. Refer to Procedure 011-038 in the Troubleshooting and Repair Manual ISC, ISCe, QSC8.3, ISL and QSL9 Engines, Bulletin 4021418.
3A
STEP 2D: Check for fault code presence.
Condition:
• Connect all components
• Turn keyswitch ON
• Connect the Emissions Monitor Interface electronic service tool.
Action Specification/Repair Next Step
Reset the Exhaust Gas Treatment Monitor Unit using the Emissions Monitor Interface electronic service tool.
• Check for the appropriate circuit response after 30 seconds.
• Use the Emissions Monitor Interface electronic service tool to read the fault codes.
Fault Code 0006 present?
YES Repair:
Replace the exhaust gas treatment monitor unit. Refer to Procedure 011-035 in the Troubleshooting and Repair Manual ISC, ISCe, QSC8.3, ISL and QSL9 Engines, Bulletin 4021418.
3A
Fault Code 0006 present?
NO Repair:
None. The removal and installation of the connector corrected the failure.
3A
STEP 3: Clear the fault code.
STEP 3A: Disable the fault code.
Condition:
• Connect all components
• Turn keyswitch ON
• Connect the Emissions Monitor Interface electronic service tool.
Action Specification/Repair Next Step
Reset the fault codes using the Emissions Monitor Interface slectronic service tool.
• Verify that the emission warning lamps flash twice to signify a reset.
• Start the engine and let it idle for one minute.
Fault Code 0006 present?
YES
1A
Fault Code 0006 present?
NO
Repair complete.