Symptom Related Diagnostic Procedures
NOTE: Perform the Self Test before performing any diagnosis on the memory seats and mirrors. Initial Inspection and Diagnostic Overview1. If the system will not perform the Self Test, do Test E, Left Front Seat Control Switch (X121) test.
Test E
2. If manual and memory seat functions are totally inoperative, check Maxi-Fuse(R) MF3 of the Engine Compartment Fuse Box (P125), and Fuses F2 and F3 of the Driver's Underseat Fuse Box (P108). Do Test A if the fuses are OK.
Test A
3. If the system does not retain memory seat or mirror positions, do Test A, Memory Seat ECU (Z146) power test.
Test A
4. If the memory seat system does not operate when the ignition is in position II and the handbrake is applied, do Test B (manual transmission) or Test C (automatic transmission).
Test B
Test C
5. If memory seat and mirror functions do not operate but the seat does operate in some modes manually, do Test E, Left Front Seat Control Switch (X121) test.
Test E
6. If all seat motors operate during the Self Test but do not operate when the Left Front Seat Control Switch (X121) is used, do Test F.
Test F
7. If all mirror motors operate during the Self Test but do not operate when the Mirror Adjustment Switch (X146) is used, do Test G.
Test G
8. If a seat motor moves during the Self Test and then stops, replace the defective seat sensor (X194, X195, X196, X197).
9. If a seat motor (M126, M127, M128, M129) does not move at all during the Self Test, do Test J.
Test J
10. If a mirror motor does not move at all during the Self Test, do Test K (Left Memory Mirror Actuator, M115) or Test L (Right Memory Mirror Actuator, M123).
Test K
Test L
11. It a mirror motor moves during the Self Test and then stops, do Test H (Left Memory Mirror Actuator, M115) or Test I (Right Memory Mirror Actuator, M123).
Test H
Test I