GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Vivant 🢒 HVAC 🢒 HVAC Systems - Automatic 🢒 DTC 5

Conditions for Setting the DTC

This code will set if the output of the sun sensor indicates a probable short circuit or an open in the sensor or the associated wiring harness, or a malfunction of the full automatic temperature control (FATC) controller.

Step

Action

Value(s)

Yes

No

1
  1. Turn OFF the ignition.
  2. Lift the sun sensor from the top of the dash panel.
  3. Secure the FATC harness below the sun sensor connector so it cannot fall through the opening in the top of the dash panel.
  4. Disconnect the sun sensor connector from the automatic temperature control (FATC) harness.
  5. Examine the wiring from the sensor to the connector, and examine the connector for any signs of damage.
  6. Measure the resistance between the sun sensor connector terminals.

Is there any sign of damage in the wiring or connector or does the resistance equal the value specified?

0 ohms

Go to Step 2

Go to Step 3

2

Repair the damaged wiring or the connector, or replace the sun sensor as required.

Did you complete the repair?

--

System OK

--

3
  1. Remove the FATC controller from the instrument panel, leaving the wiring harness connected.
  2. Measure the voltage terminal A4 and B11 by backprobing the connectors.

Does the voltage measure within the specified value?

2-5 V

Go to Step 5

Go to Step 4

4

Repair the open or short circuit, and connector terminals as required.

Did you complete the repair?

--

System OK

--

5

Repair the connector terminals or replace the sun sensor or FATC controller as required.

Did you complete the repair?

--

System OK

--