For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Was the entire HVAC System Check performed? | -- | Go to Step 2 | Go to HVAC System Check
2 |

1. Place the ignition switch in the RUN position.
2. Connect a test light from the electric slave actuator connector terminal 10 and ground.

Is the test light on?

--

Go to Step 3

Go to Step 4

3 | Backprobe with a test light between the electric slave actuator connector terminal 7 and B+. Is the test light on? | -- | Go to Step 5 | Go to Step 6
4 | Repair the poor connection or open in CKT 241 between the electric slave actuator connector terminal 10 and S264. Is the repair complete? | -- | Go to Step 11 | --
5 |

1. Turn the ignition switch to the OFF position.
2. Disconnect the electric slave actuator connector.
3. Disconnect the auxiliary heater-A/C control connector C1.
4. Disconnect the heater-A/C control connector C2.
5. Using a J 39200 , check for continuity in CKT 733 between the heater-A/C control connector C2 terminal G and the electric slave actuator connector terminal 8.

Is the resistance within the specified values?

0-2 ohms

Go to Step 7

Go to Step 8

6 | Repair the poor connection or open in CKT 150 between the electric slave actuator connector terminal 7 and S213. Is the repair complete? | -- | Go to Step 11 | --
7 | Using a J 39200 , check for continuity in CKT 733 between the heater-A/C control connector C2 terminal G and ground. Is CKT 733 shorted to ground? | -- | Go to Step 9 | Go to Step 10
8 | Repair the poor connection or open in CKT 733 between the electric slave actuator connector terminal 8 and the heater-A/C control connector C2 terminal G. Is the repair complete? | -- | Go to Step 11 | --
9 | Repair the short to ground in CKT 733. Is the repair complete? | -- | Go to Step 11 | --
10 | Replace the electric slave actuator. Refer to Temperature Actuator Replacement . Is the repair complete? | -- | Go to Step 11 | --
11 |

1. Turn the ignition switch to the OFF position.
2. Reconnect all connectors/components disconnected.

Have all repairs been made?

--

Go to HVAC System Check

--