1. Check the HVAC fuse in the fuse block.
2. Ensure the HVAC fuse is open.

Is the HVAC fuse open?

--

Go to Step 2

Go to Step 3

Repair a short to ground in circuit 41(BRN).

Is the repair complete?

--

System OK

--

1. Turn the ignition switch to the RUN position.
2. Install a Digital Multimeter (DMM) .
3. LH Inoperative: Backprobe between the heater-A/C control harness connector C2 terminal G (circuit 1199) and ground.
4. RH Inoperative: Backprobe between the heater-A/C control harness connector C2 terminal E (circuit 1199) and ground.
5. Move the temperature control knob from WARM to COOL and COOL to WARM.

Does the measured voltage vary within the specified value?

1-12 V

Go to Step 4

Go to Step 5

1. Disconnect the inoperative electric actuator connector.
2. Connect a J 39200 DMM, between the inoperative electric actuator harness connector terminal 10 (circuit 41) and ground.

Is the measured voltage within the specified value?

9-14 V

Go to Step 6

Go to Step 7

1. Disconnect the heater-A/C control harness connector C2.
2. Connect a J 39200 DMM, between the heater-A/C control connector C2 terminal C (circuit 41) and ground.
3. Turn the ignition switch to the RUN position.

Is the measured voltage within the specified value?

9-14 V

Go to Step 13

Go to Step 12

Connect a J 39200 DMM, between the inoperative electric actuator harness connector between terminal 10 (circuit 41) and terminal 7 (circuit 1450).

Is the measured voltage within the specified value?

9-14 V

Go to Step 8

Go to Step 9

Repair a poor connection or an open in circuit 41 (BRN) between the inoperative electric actuator harness connector terminal 10 and S 233.

Is the repair complete?

--

System OK

--

1. Connect a J 39200 DMM, between the inoperative electric actuator harness connector terminal 8 and ground.
2. Turn the ignition switch to the RUN position.
3. Move the temperature control knob from WARM to COOL and COOL to WARM.

Does the measured voltage vary within the specified value?

1-12 V

Go to Step 10

Go to Step 11

Repair a poor connection or an open in circuit 1450 between the inoperative electric actuator harness connector terminal 7 and G 200.

Is the repair complete?

--

System OK

--

1. Check for a poor connection at the inoperative electric actuator. Repair or replace, if necessary.
2. Check for a binding air temperature valve. Repair or replace, if necessary.
3. Replace the inoperative electric actuator. Refer to Temperature Actuator Replacement (LH (Driver)) .

Is the repair complete?

--

System OK

--

1. Right Inoperative: Repair a poor connection or an open in circuit 1199 (DK BLU).
2. Left Inoperative: Repair a poor connection or an open in circuit 1236 .

Is the repair complete?

--

System OK

--

Repair a poor connection or an open in circuit 41 (BRN) between S 233 and the heater-A/C control harness connector C2 terminal C.

Is the repair complete?

--

System OK

--

1. Turn the ignition switch to the OFF position.
2. Disconnect the inoperative electric actuator connector.
3. Left Inoperative: Check for a short to ground in circuit 1199 (DK BLU).
4. Right Inoperative: Check for a short to ground in circuit 1236.

Is the circuit shorted to ground?

--

Go to Step 14

Go to Step 15

1. Left Inoperative: Repair a short to ground in circuit 1199 (DK BLU).
2. Right Inoperative: Repair a short to ground in circuit 1236.

Has the repair been made and the system rechecked?

--

System OK

--

Replace the heater-A/C control. Refer to Control Assembly Replacement .

Has the repair been made and the system rechecked?

--

System OK

--