Dodge Caliber. Manual - part 300
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When Monitored:
During heated seat operation.
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Set Condition:
This code is set immediately if the Heated Seat Module detects voltage under 10 volts on the (F937) Fused
Ignition Switch Output (Run) circuit.
Possible Causes
(F937) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT HIGH RESISTANCE
HEATED SEAT MODULE
Diagnostic Test
1.
CHECK PCM FOR CHARGING SYSTEM DTC
With the scan tool, read Powertrain Control Module DTC’s.
Are there any Charging System DTC’s set in the Powertrain Control Module?
Yes
>> (Refer to 8 - ELECTRICAL/CHARGING - DIAGNOSIS AND TESTING) for Charging System diagnostic
procedures.
No
>> Go To 2
Perform BODY VERIFICATION TEST – VER 1. (Refer to BODY VERIFICATION TEST - VER 1).
2.
VERIFY THAT DTC B2181 - HEATED SEAT MODULE POWER SUPPLY LOW IS ACTIVE
With the scan tool, record and erase DTC’s.
Turn the ignition switch to the Off position then start the engine and operate the heated seats for one minute.
With the scan tool, read DTC’s.
Does the DTC B2181 - HEATED SEAT MODULE POWER SUPPLY LOW reset?
Yes
>> Go To 3
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 BODY VERIFICATION TEST – VER 1. (Refer to BODY VERIFICATION TEST - VER 1).
3.
(F937) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT HIGH RESISTANCE
Disconnect the Heated Seat Module connector.
NOTE: Check connectors - Clean and repair as necessary.
Start the engine and let idle.
Using a 12-volt test light connected to ground, check the (F937) Fused
Ignition Switch Output (Run) circuit at the HSM connector.
NOTE: The test light must illuminate brightly. Compare the bright-
ness to that of a direct connection to the battery.
Does the test light illuminate brightly?
Yes
>> Replace the Heated Seat Module in accordance with the
Service Information.
Perform BODY VERIFICATION TEST – VER 1. (Refer to
BODY VERIFICATION TEST - VER 1).
No
>> Repair the (F937) Fused Ignition Switch Output (Run) circuit
as necessary.
Perform BODY VERIFICATION TEST – VER 1. (Refer to
BODY VERIFICATION TEST - VER 1).
PM
HEATED SEATS - ELECTRICAL DIAGNOSTICS
8G - 55