Mirrors - Temperature Displays SC or OC
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The following table will be used to measure the resistance of the sensor and compare it with the actual ambient temperature. The mirror's temperature accuracy should be within 5 degrees of the actual temperature. The actual temperature should not be taken from a radio station, a sign displaying the temperature, etc. A temperature measuring tool such as a thermometer should be used. Some temperature measuring tools may be within 5 degrees of the actual temperature. Make sure to consult the manufacturer for the accuracy of the tool. This comparison can make the mirror seem off by 5-10 degrees of the actual temperature when it is not.
Ambient Air Temperature Sensor Resistance
| °C | °F | Minimum Resistance K Ohms |
Maximum Resistance K Ohms |
|---|---|---|---|
| -35 | -31 | 234.81 | 250.59 |
| -30 | -22 | 171.69 | 182.31 |
| -25 | -13 | 126.82 | 133.99 |
| -20 | -4 | 94.63 | 99.49 |
| -15 | 5 | 71.30 | 74.58 |
| -10 | 14 | 54.21 | 56.43 |
| -5 | 23 | 41.48 | 43.17 |
| 0 | 32 | 32.00 | 33.31 |
| 5 | 41 | 24.96 | 25.83 |
| 10 | 50 | 19.61 | 20.19 |
| 15 | 59 | 15.49 | 15.94 |
| 20 | 68 | 12.31 | 12.67 |
| 25 | 77 | 9.85 | 10.12 |
| 30 | 86 | 7.96 | 8.15 |
| 35 | 95 | 6.45 | 6.61 |
| 40 | 104 | 5.27 | 5.39 |
| 45 | 113 | 4.32 | 4.42 |
| 50 | 122 | 3.56 | 3.64 |
| 55 | 131 | 2.95 | 3.02 |
| 60 | 140 | 2.46 | 2.52 |
Mirrors - Temperature Displays SC or OC
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Inside Rearview Mirror Schematics Connector End View Reference: Stationary Windows Connector End Views |
|||
| 1 | Did you review the temperature display operation of the inside rearview mirror and perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Stationary Windows |
| 2 |
|
Go to Step 3 | Go to Step 5 |
| 3 | Does the temperature display show an accurate temperature reading? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 4 |
| 4 |
|
Go to Step 12 | Go to Step 13 |
| 5 | Does the temperature display show SC? | Go to Step 6 | Go to Step 7 |
| 6 |
|
Go to Step 9 | Go to Step 13 |
| 7 |
|
Go to Step 8 | Go to Step 10 |
| 8 |
|
Go to Step 13 | Go to Step 11 |
| 9 | Test the signal circuit of the ambient air temperature sensor for a short to ground. Refer to Circuit Testing
and to Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 17 | Go to Step 14 |
| 10 | Test the signal circuit of the ambient air temperature sensor for an open or for a short to battery positive voltage. Refer to Circuit Testing
and to Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 17 | Go to Step 14 |
| 11 | Test the low reference circuit of the ambient air temperature sensor for an open or for a high resistance. Refer to Circuit Testing
and to Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 17 | Go to Step 14 |
| 12 | Test the signal and low reference circuits of the ambient air temperature sensor for high resistance. Refer to Circuit Testing
and to Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 17 | Go to Step 14 |
| 13 | Inspect for a poor connection at the harness connector of the ambient air temperature sensor. Refer to Testing for Intermittent Conditions and Poor Connections
and to Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 17 | Go to Step 15 |
| 14 | Inspect for a poor connection at the harness connector of the inside rearview mirror. Refer to Testing for Intermittent Conditions and Poor Connections
and to Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 17 | Go to Step 16 |
| 15 | Replace the ambient air temperature sensor. Refer to Ambient Air Temperature Sensor Replacement . Did you complete the replacement? |
Go to Step 17 | - |
| 16 |
IMPORTANT:
For the inside rearview mirror with a compass, perform Compass Calibration and Variance Procedure . Replace the inside rearview mirror. Refer to Rearview Mirror Replacement .Did you complete the replacement? |
Go to Step 17 | - |
| 17 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 3 |