Chevrolet Trax: DTC P00B3 OR P00B4 (2H0 OR LUJ): Radiator coolant temperature (RCT) sensor
DIAGNOSTIC CODE INDEX
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Diagnostic Instructions
- Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
- Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
- Diagnostic Procedure Instructions provides an overview of each
diagnostic category.
DTC Descriptors
DTC P00B3
Radiator Coolant Temperature (RCT) Sensor Circuit Low Voltage
DTC P00B4
Radiator Coolant Temperature (RCT) Sensor Circuit High Voltage
Diagnostic Fault Information
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Typical Scan Tool Data
Radiator Coolant Temperature Sensor
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Circuit/System Description
NOTE: The radiator
coolant temperature sensor is referred to as B34B Engine Coolant
Temperature Sensor 2 in schematics and other areas.
The radiator coolant temperature (RCT) sensor is a variable resistor that
measures the temperature of the engine
coolant in the radiator. This diagnostic checks for an open, short to ground or
an intermittent circuit condition
between the engine control module (ECM) and RCT sensor.
The following table illustrates the difference between temperature, resistance,
and voltage:
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Conditions for Running the DTC
P00B3
- The engine run time is greater than 10 s.
- The intake air temperature (IAT) is colder than 70ºC (158ºF).
- The DTC runs continuously when the above conditions are met.
P00B4
- The engine run time is greater than 60 s.
- The intake air temperature (IAT) is warmer than -7ºC (19ºF).
- The DTC runs continuously when the above conditions are met.
Conditions for Setting the DTC
P00B3
The ECM detects that the RCT sensor is warmer than 149ºC (300ºF) for greater
than 10 s.
P00B4
NOTE: The scan tool only displays to -40ºC (-40ºF).
The ECM detects that the RCT sensor is colder than -60ºC (-76ºF) for greater
than 10 s.
Action Taken When the DTC Sets
DTC P00B3 and P00B4 are Type B DTCs.
Conditions for Clearing the MIL/DTC
DTC P00B3 and P00B4 are Type B DTCs.
Diagnostic Aids
NOTE:
The engine coolant temperature (ECT) sensor is mounted on the engine and
the
radiator coolant temperature (RCT) sensor is mounted on the radiator.
- As the thermostat opens, the RCT sensor temperature should rise steadily,
then stabilize once the
thermostat opens completely.
- Test the RCT sensor at various temperature levels in order to evaluate
the possibility of a skewed sensor.
- If the vehicle has sat for greater than 8 hours, the ECT sensor and the
RCT sensor values should display
within 3ºC (5ºF).
Reference Information
Schematic Reference
Engine Heating/Cooling Schematics (Encore), Engine Heating/Cooling
Schematics (Trax)
Connector End View Reference
WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS -
INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT
CONNECTOR END VIEWS - INDEX - TRAX
Electrical Information Reference
- Circuit Testing
- Connector Repairs
- Testing for Intermittent Conditions and Poor Connections
- Wiring Repairs
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (LUV) ,
Powertrain Diagnostic Trouble
Code (DTC) Type Definitions (2H0)
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- Ignition ON.
- Verify the scan tool Radiator Coolant Temperature Sensor parameter is
between -39 to + 120ºC (-38 to
+248ºF) and changes with engine run time.
- If not between -39 to + 120ºC (-38 to +248ºF) or does not change
Refer to Circuit/System Testing.
- If between -39 to + 120ºC (-38 to +248ºF) and changes
- Operate the vehicle within the Conditions for Running the DTC. You may
also operate the vehicle within
the conditions that you observed from the Freeze Frame/Failure Records data.
- Verify the DTC does not set.
Refer to Circuit/System Testing.
- All OK.
Circuit/System Testing
- Ignition OFF and all vehicle systems OFF, disconnect the harness
connector at the B34B Engine Coolant
Temperature Sensor. It may take up to 2 min for all vehicle systems to power
down.
- Test for less than 5 ohms between the low reference circuit terminal 2
and ground.
- Ignition OFF, disconnect the harness connector at the K20 Engine Control
Module.
- Test for less than 2 ohms in the low reference circuit end to end.
- If 2 ohms or greater, repair the open/high resistance in the circuit.
- If less than 2 ohms, replace the K20 Engine Control Module.
- If less than 5 ohms
- Ignition ON.
- Verify the scan tool Radiator Coolant Temperature Sensor parameter is
colder than -39ºC (-38ºF).
- If warmer than -39ºC (-38ºF)
- Ignition OFF, disconnect the harness connector at the K20 Engine Control
Module.
- Test for infinite resistance between the signal circuit terminal 1 and
ground.
- If less than infinite resistance, repair the short to ground on the
circuit.
- If infinite resistance, replace the K20 Engine Control Module.
- If colder than -39ºC (-38ºF)
- Install a 3 A fused jumper wire between the signal circuit terminal 1
and the low reference circuit
terminal 2.
- Verify the scan tool Radiator Coolant Temperature sensor parameter is
warmer than 137ºC (280ºF).
- If colder than 137ºC (280ºF)
- Ignition OFF, remove the jumper wire, disconnect the harness connector
at the K20 Engine Control
Module.
- Test for less than 1 V between the signal circuit and ground.
- If 1 V or greater, repair the short to voltage on the circuit.
- If less than 1 V
- Ignition OFF.
- Test for less than 2 ohms in the signal circuit end to end.
- If 2 ohms or greater, repair the open/high resistance in the circuit.
- If less than 2 ohms, replace the K20 Engine Control Module.
- If warmer than 137ºC (280ºF)
- Test or replace the B34B Engine Coolant Temperature Sensor.
Component Testing
- Ignition OFF, disconnect the harness connector at the B34B Engine
Coolant Temperature Sensor.
- Test the RCT sensor by varying the sensor temperature while monitoring
the sensor resistance. Compare
the readings with the Temperature Versus Resistance table. The resistance
values should be in range of
the table values.
- If not within the specified range
- Replace the B34B Engine Coolant Temperature Sensor.
- If within the specified range
- Test for infinite resistance between each terminal and the sensor
housing.
- If less than infinite resistance
Replace the B34B Engine Coolant Temperature Sensor.
- All OK.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic
procedure.
- Engine Coolant Temperature Sensor Replacement (Water Outlet) , Engine
Coolant Temperature
Sensor Replacement (Radiator) for radiator coolant temperature sensor
replacement.
- Engine Control Module Replacement for engine control module replacement,
setup, and programming.
READ NEXT:
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diag
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diag
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diag
SEE MORE:
The diagnostic information contained in this Diagnostic Aids section will
help you determine the correct course
of action to take for the following 4 main conditions. Refer to the appropriate
condition from this list:
Vibration Diagnostic Aids - Vibration Intermittent or Not Duplicated
Vibratio
TRANSMISSION SYSTEM DESCRIPTION AND OPERATION
The M32-6 is a 6-speed manual transmission. This manual transmission is an
all-synchromesh 3-shaft
transmission.
Fig. 93: 3 Shaft Transmission
This 3-shaft transmission (1) has the following advantages:
Compact construction
Improved smooth-running