Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 618
3.
CHECK THE VOLTAGE ON THE (A110) FUSED B(+) CIRCUIT
Disconnect the Seat Memory Module connector.
NOTE: Check connectors - Clean and repair as necessary.
Start the engine and let idle.
Measure the voltage on the (A110) Fused B(+) circuit at the MSM con-
nector and compare to voltage at the vehicles battery.
Is the voltage at the MSM connector the same as measured at
the battery?
Yes
>> Replace the Memory Seat Module in accordance with the
service information.
Perform POWER SEAT SYSTEM VERIFICATION TEST –
VER 1.
No
>> Repair the (A110) Fused B(+) circuit as necessary.
Perform POWER SEAT SYSTEM VERIFICATION TEST –
VER 1.
8N - 170
POWER SEATS - ELECTRICAL DIAGNOSTICS
LX
B221C-MEMORY SEAT MODULE INTERNAL
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
Ignition on.
•
Set Condition:
This code is set immediately if the Memory Seat Module internal self test fails.
Possible Causes
MEMORY SEAT MODULE
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.
Diagnostic Test
1.
VERIFY THAT DTC B221C-MEMORY SEAT MODULE INTERNAL IS ACTIVE
With the scan tool, record and erase DTC’s
Cycle the ignition switch off then back on.
With the scan tool, read DTC’s.
Does the DTC B221C-MEMORY SEAT MODULE INTERNAL reset?
Yes
>> Replace the Memory Seat Module.
Perform POWER SEAT SYSTEM VERIFICATION TEST – VER 1.
No
>> The conditions that caused this code to set are not present at this time. Using the wiring diagram/sche-
matic as a guide, inspect the wiring and connectors.
Perform POWER SEAT SYSTEM VERIFICATION TEST – VER 1.
LX
POWER SEATS - ELECTRICAL DIAGNOSTICS
8N - 171
U0020-CAN B BUS OFF PERFORMANCE
For a complete wiring diagram Refer to Section 8W.
8N - 172
POWER SEATS - ELECTRICAL DIAGNOSTICS
LX
•
When Monitored:
Continuously.
•
Set Condition:
The Memory Seat Module detects the (D55) CAN B Bus (+) circuit or (D54) CAN B Bus (-) circuit open.
Possible Causes
(D55) CAN B BUS (+) CIRCUIT OPEN
(D54) CAN B BUS (-) CIRCUIT OPEN
MEMORY SEAT MODULE
Diagnostic Test
1.
TEST FOR INTERMITTENT CONDITION
Turn the ignition on.
With the scan tool, record and erase MSM DTC’s
Cycle the ignition from on to off three times.
Turn the ignition on.
With the scan tool, read active MSM DTC’s.
Does the scan tool display this DTC as active?
Yes
>> Go To 2
No
>> The conditions that caused this code to set are not present at this time. Using the wiring diagram/sche-
matic as a guide, inspect the wiring and connectors.
2.
(D55) CAN B BUS (+) CIRCUIT OPEN
Turn the ignition off.
Disconnect the Memory Seat Module C1 harness connector.
Measure the voltage between the (D55) CAN B Bus (+) circuit and
ground.
Is there any voltage present?
Yes
>> Inspect the wiring and connectors for damage or shorted
circuits. If ok, replace the Memory Seat Module in accor-
dance with the service information.
Perform POWER SEAT SYSTEM VERIFICATION TEST -
VER 1.
No
>> Repair the (D55) CAN B Bus (+) circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
LX
POWER SEATS - ELECTRICAL DIAGNOSTICS
8N - 173
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