For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Was the entire Lumbar Support System Check performed? | -- | Go to Step 2 | Go to Lumbar Support System Check
2 | With a test light to ground, backprobe C310 terminal A. Is the test light on? | -- | Go to Step 3 | Go to Step 4
3 | Connect a test light between terminals A and B of C310. Is the test light on? | -- | Go to Step 5 | Go to Step 6
4 | Repair a poor connection or open in circuit 1240. Is the repair complete? | -- | Go to Step 11 | --
5 | With a test light to ground, backprobe the power seat cushion air control module connector C1 terminal A. Is the test light on? | -- | Go to Step 7 | Go to Step 8
6 | Repair a poor connection or open in circuit 1450. Is the repair complete? | -- | Go to Step 11 | --
7 |

1. Disconnect the power seat cushion air control module connectors.
2. Connect a test light between connector C1 terminal A and connector C2 terminal D at the power seat cushion air control module connector.

Is the test light on?

--

Go to Step 9

Go to Step 10

8 | Repair the poor connector or open in circuit 1240. Is the repair complete? | -- | Go to Step 11 | --
9 | Replace the power seat cushion air control module. Refer to Lumbar Motor Replacement . Is the repair complete? | -- | Go to Step 11 | --
10 | Repair a poor connection or open in ground circuit 1450. Is the repair complete? | -- | Go to Step 11 | --
11 |

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

Have all the repairs been made?

Go to Lumbar Support System Check