Self Test
The self test mode is a test routine the memory seat ECU (Z146) performs when initialized. When the ECU is commanded into the self test mode, it operates the seats and the mirrors in all planes of travel. Perform the self test before attempting any diagnosis of the memory seat and mirror system. The cause of a system fault can be narrowed down through observation of the seats and mirrors during the self test mode. Before starting the self test mode, be sure to clear away everything from the pathway of the seats. To initialize the self test mode, do the following:
- Park vehicle and open driver's door.
- Press round, green memory button 5 times.
- Press seat position buttons 1 and 2 in the following sequence: 2-1-1-2.
Seat and mirrors will now move. The test is completed when the seat and mirrors stop in the mid-travel position.
If a motor did not operate at all during the test sequence, that motor or its wiring is faulty. If a motor moves in a plane and then suddenly stops, a loss of the feedback position is indicated. Proceed to SYMPTOM INDEX table for further testing.
| Symptom | Perform Test | ||
|---|---|---|---|
| Manual & Memory Seat Functions Inoperative (Fuses Okay) | A | ||
| System Does Not Retain Memory Seat Or Mirror Positions | A | ||
| Memory Seat System Does Not Operate When Ignition Is In Position II & Handbrake Is Applied (Manual Transmission) | B | ||
| Memory Seat System Does Not Operate When Ignition Is In Position II & Handbrake Is Applied (Automatic Transmission) | C | ||
| Manual & Memory Seat Functions Inoperative (Fuses Okay) Or System Does Not Retain Memory Seat Or Mirror Positions | D | ||
| System Will Not Perform Self Test | E | ||
| Memory Seat & Mirror Functions Do Not Operate, But Seat Does Operate In Some Modes Manually | E | ||
| All Seat Motors Operate During Self Test, But Not When Driver Seat Control Switch Is Used | F | ||
| All Mirror Motors Operate During Self Test, But Not When Mirror Adjustment Switch Is Used | G | ||
| Seat Motor Moves During Self Test & Then Stops | (1) | ||
| Seat Motor Does Not Move At All During Self Test | J | ||
| Mirror Motor Does Not Move At All During Self Test (Left) | K | ||
| Mirror Motor Does Not Move At All During Self Test (Right) | L | ||
| Mirror Motor Moves During Self Test, Then Stops (Left) | H | ||
| Mirror Motor Moves During Self Test, Then Stops (Right) | I | ||
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