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Test Description

WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

  1. 3:  Tests for the proper operation of the circuit in the high voltage range.
  2. 4:  Tests for the proper operation of the circuit in the low voltage range. If the fuse in the jumper opens when you perform this test, the signal circuit is shorted to voltage.
DTC B0184 or B0189

Step Action Values Yes No
Schematic Reference: HVAC Schematics 
Connector End View Reference: HVAC Connector End Views 
1 Did you perform the Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, observe the Driver or Passenger Solar Sensor parameter in the Climate Control Panel Open/Short Data list.
Does the scan tool indicate that the Solar Sensor parameter is with in the specified range?		 0.09-4.90 V Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems Go to Step 3 
3 
  1. Turn OFF the ignition.
  2. Disconnect the sunload sensor assembly.
  3. Turn ON the ignition, with the engine OFF.
  4. With a scan tool, observe the Driver or Passenger Solar Sensor parameter in the Climate Control Panel Open/Short Data list.
Does the scan tool indicate that the Solar Sensor parameters are greater than the specified value?		 4.90 V Go to Step 4  Go to Step 5 
4 
  1. Turn OFF the ignition.
  2. Connect a 3-amp fused jumper wire between the driver or passenger signal circuit of the sunload sensor assembly and the low reference circuit of the sunload sensor assembly.
  3. Turn ON the ignition, with the engine OFF.
  4. With a scan tool, observe the Driver or Passenger Solar Sensor parameter in the Climate Control Panel Open/Short Data list.
Does the scan tool indicate that the Solar Sensor parameter is less than the specified value?		 0.09 V Go to Step 9  Go to Step 6 
5 Test the driver or passenger signal circuit of the sunload sensor assembly for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 13  Go to Step 10 
6 Test the driver or passenger signal circuit of the sunload sensor assembly for a short to voltage, a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 13  Go to Step 7 
7 Test the low reference circuit of the sunload sensor assembly for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 13  Go to Step 8 
8 Test the following signal circuits for a short to voltage:
  • Evaporator temperature sensor
  • Ambient air temperature sensor
  • Inside air temperature sensor
  • Left or right sunload sensor
  • Ambient light sensor

Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 13  Go to Step 10 
9 Inspect for poor connections at the harness connector of the sunload sensor assembly. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 13  Go to Step 11 
10 Inspect for poor connections at the harness connector of the HVAC control module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 13  Go to Step 12 
11 Replace the sunload sensor assembly. Refer to Sun Load Sensor Replacement .
Did you complete the replacement?		 - Go to Step 13  -
12 Replace the HVAC control module. Refer to Control Module References in Computer/Integrating Systems for replacement, setup and programming.
Did you complete the replacement?		 - Go to Step 13  -
13
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Does the DTC reset?		 - Go to Step 2  System OK
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