For 1990-2009 cars

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

1. Turn the ignition switch to the OFF position.
2. Connect a fused jumper from the memory seat/mirror diagnostic connector to ground (the connector may be taped up into the body harness).
3. Listen for a chime that acknowledges entrance into mode 1 diagnostics.

Does the memory seat/mirror module chime once and enter diagnostic mode?

--

Go to Step 4

Go to Step 3

3 | Inspect CKT 571 (YEL/BLK) for an open. Refer to Testing for Continuity in Wiring Systems. Is CKT 571 OK? | -- | Go to Step 4 | Go to Step 10
4 |

1. Disconnect the ground from the memory seat/mirror diagnostic connector and then reconnect the ground again within 5 seconds.
2. The module will chime twice in order to acknowledge entrance into mode 2 diagnostics.

Does the module chime twice?

--

Go to Step 5

Go to Step 11

5 |

1. Refer to Memory Seats System Check for a detailed explanation of the memory seat/mirror diagnostic modes.
2. Operate the left seat switch in all directions.

The module will chime once for each open or short circuit to a position sensor or any position sensor discontinuity.

3. Any time a switch is operated and the module chimes, the module senses a problem with the position sensor.

Were there any switch operations where the memory seat/mirror module sounded a chime?

--

Go to Step 6

Go to Step 11

6 | Test for an open or short in CKT 557 (BRN/WHT). Refer to Testing for Continuity in Wiring Systems. Is CKT 557 OK? | -- | Go to Step 7 | Go to Step 10
7 | Test for an open in CKT 788 (GRY) between the seat front vertical position sensor and S324. Refer to Testing for Continuity in Wiring Systems. Is CKT 788 OK? | -- | Go to Step 8 | Go to Step 10
8 | Test for an open in CKT 782 (BLK) between the seat front vertical position sensor and S332. Refer to Testing for Continuity in Wiring Systems. Is CKT 782 OK? | -- | Go to Step 9 | Go to Step 10
9 | Replace the seat front vertical position sensor. Refer to Seat Horizontal and Vertical Drive Cable Replacement . Is the repair complete? | -- | Go to Memory Seats System Check | --
10 | Repair the suspect circuit. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Memory Seats System Check | --
11 | Replace the memory seat/mirror module. Refer to Memory Seat Control Module Replacement . Is the repair complete? | -- | Go to Memory Seats System Check | --