For 1990-2009 cars
Instrument Cluster Components
00 UVAN DID Schematic Figure SIO
Handling ESD Sensitive Parts Notice

### Circuit Description

The Driver Information Display (DID) applies 5 volts to the ambient air temperature sensor. The ambient air temperature sensor is a thermister which varies in resistance as the temperature changes. As the resistance of the ambient air temperature sensor increases, the DID senses a larger voltage drop across the sensor, indicating a lower temperature. As the resistance of the ambient air temperature sensor decrease, the DID senses a smaller voltage drop across the sensor, indicating a higher temperature.

### Conditions for Running the DTC

The DID must be fully operational within a continuous voltage supply of 9.0 to 16.0 volts.

### Conditions for Setting the DTC

The sensed temperature must be greater than 140 degrees Celsius for more than 2 seconds.

### Action Taken When the DTC Sets

SC is displayed by the DID in the compass/temperature mode when the condition is present.

### Conditions for Clearing the DTC

• | DTC B0160 status changes from current to history when the condition is no longer present.

• | History DTC B0160 will clear after 100 consecutive fault free ignition cycles.

• | The DTC can be cleared with a scan tool.

### Test Description

The number(s) below refer to the step number(s) on the diagnostic table.

1. Tests for the proper operation of the circuit in the high voltage range.

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the driver information display diagnostic system check? | -- | Go to Step 2 | Go to Diagnostic System Check - Driver Information Systems
2 | Does the Driver Information Display (DID) display SC? | -- | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
3 |

1. Turn OFF the ignition.
2. Disconnect the ambient air temperature sensor.
3. Turn ON the ignition, with the engine OFF.

Does the DID display OC?

--

Go to Step 5

Go to Step 4

4 | Test the signal circuit of the ambient air temperature sensor 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 8 | Go to Step 7
5 | Inspect for poor connections at the ambient air temperature sensor. Refer to Circuit Testing and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 8 | Go to Step 6
6 | Replace the ambient air temperature sensor. Refer to Ambient Air Temperature Gage Sensor Replacement . Did you complete the replacement? | -- | Go to Step 8 | --
7 | Important: Perform the set up procedure for the replacement DID. Replace the DID. Refer to Driver Information Center Replacement . Did you complete the replacement? | -- | Go to Step 8 | --
8 |

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