Buick Regal: DTC B0183
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 B0183
Solar Load Sensor Circuit
For symptom byte information, refer to Symptom Byte List.
Diagnostic Fault Information
Circuit/System Description
The ambient light/sunload sensor integrates the sunload sensor and passenger
compartment temperature
sensor into a single assembly.
The solar sensor is connected to a low reference and a 5 V biased (pull up)
signal circuit voltage from
the HVAC control module. As the sunload increases, the sensor signal voltage
decreases. The signal
varies between 0.1 - 4.9 V and is provided to the HVAC control module.
The passenger compartment temperature sensor is a negative temperature
coefficient thermistor. A
signal and low reference circuit enable the sensor to operate. As the air
temperature increases, the sensor
resistance decreases. The sensor signal varies between 0 - 5 V.
Bright or high intensity light causes the vehicle interior temperature to
increase. The HVAC system
compensates for the increased temperature by diverting additional cool air into
the vehicle.
Conditions for Running the DTC
- Ignition ON.
- The HVAC Control Module is ON.
Conditions for Setting the DTC
B0183 02
The input signal is out of range. The voltage is less than 0.1 V.
B0183 05
The input signal is out of range. The voltage is greater than 4.9 V.
Action Taken When the DTC Sets
- The system will use the last valid values as default.
Conditions for Clearing the DTC
The condition for setting the DTC is no longer present.
Reference Information
Schematic Reference
HVAC Wiring Schematics
Connector End View Reference
Component Connector End View Index
Description and Operation
Automatic HVAC Description and Operation
Electrical Information Reference
- Circuit Testing
- Connector Repairs
- Testing for Intermittent Conditions and Poor Connections
- Wiring Repairs
Scan Tool Reference
Control Module References for scan tool information.
Circuit/System Testing
1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector
at the B10B Ambient
Light/Sunload Sensor. It may take up to 10 min for all vehicle systems to power
down.
NOTE: The scan tool must be disconnected from the vehicle before
performing the next test.
2. Test for less than 10 Ω between the low reference circuit terminal 6 and
ground.
- Ignition OFF, disconnect the harness connectors at the K33 HVAC Control
Module.
- Test for less than 2 Ω in the low reference circuit end to end.
- If 2 Ω or greater, repair the open/high resistance in the circuit.
- If less than 2 Ω, replace the K33 HVAC Control Module.
- Go to next step: If less than 10 Ω
3. Ignition ON.
4. Test for 4.8 - 5.2 V between the signal circuit terminal 4 and ground.
- Ignition OFF, disconnect the harness connectors at the K33 HVAC Control
Module.
- Test for infinite resistance between the signal circuit and ground.
- If less than infinite resistance, repair the short to ground on the
circuit.
- Go to next step: If infinite resistance
- Test for less than 2 Ω in the signal circuit end to end.
- If 2 Ω or greater, repair the open/high resistance in the circuit.
- If less than 2 Ω, replace the K33 HVAC Control Module.
- Ignition OFF, disconnect the harness connectors at the K33 HVAC Control
Module, ignition
ON.
- 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, replace the K33 HVAC Control Module.
- Go to next step: If between 4.8 - 5.2 V
5. Test or replace the B10B Ambient Light/Sunload Sensor.
6. Verify DTC B0183 does not set or the symptom does not occur while operating
the vehicle within
the Conditions for Running the DTC.
- If the DTC or symptom is not corrected.
Replace the K33 HVAC Control Module.
- Go to next step: If the DTC or symptom is corrected.
7. All OK.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
- HVAC Component Replacement Reference
- Control Module References for HVAC control module replacement,
programming and setup
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:
Special Tools
EN-43963 Valve Spring Compressor (off car)
EN-46116 Valve Stem Seal Remover/Installer
EN-50717 Valve Spring Compressor
For equivalent regional tools, refer to Special Tools.
1.
Remove the intake camshaft position sensor (2) and bolt (1).
2.
Remove the exhaust camshaft position
Preliminary Procedures
1. Raise and support the vehicle. Lifting and Jacking the Vehicle.
2. Place a drain pan under the drain cock.
Radiator Drain Cock
Procedure
Fill the cooling system to the proper level.
Start the engine and check for coolant leaks.
RADIATOR REPLACEMENT (2.0L LT