Electrically Heated Systems - Chrysler 300M 2002 Service Manual

Symptom:
DRIVER HEATED SEAT SWITCH OPEN/SHORTED TO GROUND
When Monitored and Set Condition:
DRIVER HEATED SEAT SWITCH OPEN/SHORTED TO GROUND
When Monitored: Ignition on.
Set Condition: If the switch is open or grounded the MHSMM will have a loss of switch
feed back and this code will set immediately. Once the condition is resolved the switch will
return to it's normal operation. Note: This DTC can also be set when the ignition switch is
cycled with the IOD fuse removed.
FUSED IGNITION SWITCH OUTPUT ST-RUN OPEN
DRIVER HEATED SEAT SWITCH
DRIVER SEAT HEATER SWITCH MUX CIRCUIT OPEN
DRIVER SEAT HEATER SWITCH MUX CIRCUIT SHORT TO GROUND
ERASE AND READ MHSMM DTC
MEMORY HEATED SEAT MIRROR MODULE
TEST
1 Does the DRBIII display any communication DTCs in the Memory Heated Seat
Mirror Module also?
Yes → Go To 2
→ Go To 3
No
2 With the DRBIII , erase MHSMM DTC's.
Start the engine and let it run for one minute while operating the heated seat switch.
With the DRBIII , read MHSMM DTC's.
Did the Driver Heated Seat Switch Open-Shorted to Ground trouble code reset?
Yes → Go To 4
→ The condition required to set the DTC is not present at this time.
No
3 Turn the ignition off.
Disconnect the Driver Heated switch connector.
Turn the ignition on.
Measure the voltage of the Fused Ignition Switch Output circuit.
Is the voltage above 10.0 volts?
Yes → Go To 4
→ Repair the Fused Ignition Switch Output circuit for an open.
No

ELECTRICALLY HEATED SYSTEMS

POSSIBLE CAUSES
ACTION
Check for intermittent problems.
Perform MEMORY HEATED SYSTEM VERIFICATION TEST -
VER 1.
Perform MEMORY HEATED SYSTEM VERIFICATION TEST -
VER 1.
183
APPLICABILITY
All
All
All