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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1712 (HVAC Systems - Automatic) >> Diagnostic Information and Procedures >> DTC B0184 >> Test Description

Test Description

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The number below refers to the step numbers on the diagnostic table.

  1. 2:  The scan tool uses a default value. This will not give an accurate reading of the sensor value if an open or a short to ground is detected.
DTC B0184

Step Action Values Yes No
Schematic Reference  : HVAC Schematics 
1 Did you perform the HVAC Diagnostic System Check? - Go to Step 2  Go to Diagnostic System Check - HVAC Systems - Automatic 
2 
  1. Turn OFF the ignition.
  2. Disconnect the sunload sensor.
  3. Turn ON the ignition, with the engine OFF.
  4. Measure the voltage from the signal circuit of the sunload sensor to a good ground.
Does the voltage measure near the specified value?		 5 V Go to Step 3  Go to Step 4 
3 Measure the voltage from the sunload sensor signal circuit to the low reference circuit of the sunload sensor.
Does the voltage measure near the specified value?		 5 V Go to Step 6  Go to Step 5 
4 Test the signal circuit of the sunload sensor for an open, for a high resistance, for a short to ground, or for a short to voltage. Refer to CIRCUIT TESTING and to WIRING REPAIRS .
Did you find and correct the condition?		 - Go to Step 10  Go to Step 7 
5 Test the low reference circuit of the sunload sensor for a high resistance or for an open. Refer to CIRCUIT TESTING and to WIRING REPAIRS .
Did you find and correct the condition?		 - Go to Step 10  Go to Step 7 
6 Inspect for poor connections at the harness connector of the sunload sensor. Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS and to CONNECTOR REPAIRS .
Did you find and correct the condition?		 - Go to Step 10  Go to Step 8 
7 Inspect for poor connections at the harness connector of the HVAC control module. Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS and to CONNECTOR REPAIRS .
Did you find and correct the condition?		 - Go to Step 10  Go to Step 9 
8 Replace the sunload sensor. Refer to Sun Load Sensor Replacement .
Did you complete the replacement?		 - Go to Step 10  -
9
IMPORTANT: Perform the calibration procedure for the HVAC control module.
Replace the HVAC control module. Refer to HVAC Control Module Replacement .Did you complete the replacement?		 - Go to Step 10  -
10
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle according to the Conditions for Running in the DTC.
Does the DTC set again?		 - Go to Step 2  System OK
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