Front Riser Up Position Stuck
NOTE:
After making any repairs, perform MEMORY HEATED SYSTEM VERIFICATION TEST
under VERIFICATION TESTS.
Monitored & Set Condition
- When Monitored: Ignition on.
- Set Condition: If the seat switch is active for 30 seconds, this code will set and the MHSMM will ignore the input until the state has changed. Once the stuck condition is removed, the seat will resume to normal operation. Code will remain for 20 ignition cycles.
Possible Causes:
- Seat Front Up Switch Sense Wire Short To Voltage
- Driver Power Seat Switch
- Memory Heated Seat Mirror Module
Testing
- Turn ignition off. Disconnect power seat switch connector. Turn ignition on. Measure voltage on power seat switch connector terminal No. 9, seat front up switch sense circuit (Yellow/Light Green wire). See Figure . If any voltage exists, leave power seat switch connector disconnected and go to next step. If no voltage exists, replace power seat switch. See POWER SEATS article.
- Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Turn ignition on. Measure voltage between ground and MHSMM connector C1 terminal No. 21, seat front up switch sense circuit (Yellow/Light Green wire). See Figure . If any voltage exists, repair short to voltage in Yellow/Light Green wire. If no voltage exists, replace MHSMM. See MEMORY HEATED SEAT/MIRROR MODULE under REMOVAL & INSTALLATION.