Chrysler 300M 2002 Service Manual page 2143

MEMORY SEAT
Symptom:
HORIZONTAL FORWARD POSITION STUCK
When Monitored and Set Condition:
HORIZONTAL FORWARD POSITION STUCK
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.
HORIZONTAL FORWARD SWITCH SENSE WIRE SHORT TO VOLTAGE
DRIVER POWER SEAT SWITCH
MEMORY HEATED SEAT MIRROR MODULE
TEST
1 Disconnect the Power Seat Switch connector.
Measure the voltage of the Seat Horizontal Forward Switch Sense circuit.
Is there any voltage present?
Yes → Go To 2
→ Replace the Power Seat Switch.
No
2 Disconnect the Power Seat Switch connector.
Disconnect the Memory Heated Seat Mirror Module C1 connector.
Turn the ignition on.
Measure the voltage of the Horizontal Forward Switch Sense circuit to ground..
Is there any voltage present?
Yes → Repair the Horizontal Forward Switch Sense wire for a short to
→ Go To 3
No
3 If there are no possible causes remaining, view repair.
Repair
POSSIBLE CAUSES
ACTION
Perform MEMORY HEATED SYSTEM VERIFICATION TEST -
VER 1.
voltage.
Perform MEMORY HEATED SYSTEM VERIFICATION TEST -
VER 1.
Replace the Memory Heated Seat Mirror Module.
Perform MEMORY HEATED SYSTEM VERIFICATION TEST -
VER 1.
420
APPLICABILITY
All
All
All