Jeep Grand Cherokee WK. Manual — part 379
B1094-FRONT LEFT SEAT HEATER CONTROL CIRCUIT OPEN (CONTINUED)
2.
CHECK FOR AN OPEN SEAT HEATER B(+) DRIVER FROM HSM TO SEAT CUSHION
Disconnect the Left Cushion Pad Heater 2 – way connector.
Disconnect the Heated Seat Module 6 – way connector.
NOTE: Check connectors - Clean and repair as necessary.
Measure the resistance of the Left Seat Heater B(+) Driver circuit from
the HSM 6 – way to the Cushion Pad Heater 2 – way connector.
Is the resistance below 2 ohms?
Yes
>> Go To 3
No
>> Repair the open Seat Heater B(+) Driver circuit.
Perform BODY VERIFICATION TEST – VER 1.
3.
CHECK THE LEFT SEAT HEATER CUSHION GROUND CIRCUIT
Using a 12-volt test light connected to 12-volts, check the ground cir-
cuit at the Heater Cushion Pad 2 – way connector.
Does the test light illuminate brightly?
Yes
>> Go To 4
No
>> Repair the open ground circuit.
Perform BODY VERIFICATION TEST – VER 1.
8G - 22
HEATED SEATS - ELECTRICAL DIAGNOSTICS
WK
B1094-FRONT LEFT SEAT HEATER CONTROL CIRCUIT OPEN (CONTINUED)
4.
CHECK THE LEFT CUSHION PAD HEATER RESISTANCE
Check the resistance of the Cushion Pad Heater element by measur-
ing between the Left Seat Heater B(+) Driver and the Ground circuit at
the 2 – way connector (component side).
Is the resistance above 4.9 ohms?
Yes
>> Replace the seat cushion pad heater element as neces-
sary.
Perform BODY VERIFICATION TEST – VER 1.
No
>> 5
Perform BODY VERIFICATION TEST – VER 1.
5.
CHECK THE LEFT SEAT BACK HEATER RESISTANCE
Disconnect the Left Seat Back Heater 2 – way connector.
NOTE: Check connectors - Clean and repair as necessary.
Check the resistance of the seat back heater element by measuring
between the Left Seat Heater B(+) Driver and the Ground circuit at the
connector 2 – way (component side).
Is the resistance above 5.5 ohms?
Yes
>> Replace the seat back heater element as necessary.
Perform BODY VERIFICATION TEST – VER 1.
No
>> 6
Perform BODY VERIFICATION TEST – VER 1.
6.
CHECK THE LEFT SEAT BACK HEATER GROUND CIRCUIT
Using a 12-volt test light connected to 12-volts, check the ground cir-
cuit at the Seat Back Heater 2 – way connector.
Does the test light illuminate brightly?
Yes
>> Go To 7
No
>> Repair the open ground circuit.
Perform BODY VERIFICATION TEST – VER 1.
WK
HEATED SEATS - ELECTRICAL DIAGNOSTICS
8G - 23
B1094-FRONT LEFT SEAT HEATER CONTROL CIRCUIT OPEN (CONTINUED)
7.
CHECK FOR AN OPEN SEAT HEATER B(+) DRIVER FROM HSM TO SEAT BACK
NOTE: Check connectors - Clean and repair as necessary.
Measure the Left Seat Heater B(+) Driver circuit from the Seat Back
connector to the HSM connector.
Is the resistance below 2.0 ohms?
Yes
>> Replace the Heated Seat Module.
Perform BODY VERIFICATION TEST – VER 1.
No
>> Repair the Left Seat Heater B(+) Driver circuit for an open
back to the splice.
Perform BODY VERIFICATION TEST – VER 1.
8G - 24
HEATED SEATS - ELECTRICAL DIAGNOSTICS
WK
B1096-FRONT RIGHT SEAT HEATER CONTROL CIRCUIT LOW
WK
HEATED SEATS - ELECTRICAL DIAGNOSTICS
8G - 25
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