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 13
4 |

1. Refer to Memory Seats System Check for a detailed explanation of the memory seat/mirror diagnostic modes.
2. Operate the MEMORY-1, the MEMORY-2, and the SET buttons on the left seat/lock switch (Oldsmobile) or the outside mirror switch (Buick).

The module will chime once for each switch input that the module receives.

3. Any time a switch is operated and the module does not chime, the module did not receive an input from that switch.

Were there any switch operations where the memory seat/mirror module did not sound a chime?

--

Go to Step 9

Go to Step 5

5 |

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 6

Go to Step 12

6 |

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 7

Go to Step 11

7 | Inspect CKT 788 (GRY) for an open or short. Refer to Testing for Continuity in Wiring Systems. Is CKT 788 OK? | -- | Go to Step 8 | Go to Step 13
8 | Inspect CKT 782 (BLK) for an open or short. Refer to Testing for Continuity in Wiring Systems. Is CKT 782 OK? | -- | Go to Step 11 | Go to Step 13
9 | Inspect the following circuits for an open between the left seat/lock switch (Oldsmobile) or the outside mirror switch (Buick) and the memory seat/mirror module:

• | CKT 615 (WHT) MEMORY-1

• | CKT 616 (PPL) MEMORY-2

• | CKT 614 (ORN) SET

Refer to Testing for Continuity in Wiring Systems.

Is the suspect circuit OK?

--

Go to Step 10

Go to Step 13

10 | Replace the left seat/lock switch (Oldsmobile) or the outside mirror switch (Buick). Refer to Power Seat Switch Replacement in Seats or Power Mirror Switch Replacement in Doors. Is the repair complete? | -- | Go to Memory Seats System Check | --
11 | The system is functioning Perform the Memory Seats System Check . Is the symptom still present? | -- | Go to Step 12 | System OK
12 | Replace the memory seat/mirror module. Refer to Memory Seat Control Module Replacement . Is the memory seat/mirror repair complete? | -- | Go to Memory Seats System Check | --
13 | Repair the suspect circuit. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Memory Seats System Check | --