Jeep Grand Cherokee WK. Manual — part 377
B1088-RIGHT HEATED SEAT SWITCH INPUT CIRCUIT LOW (CONTINUED)
For the Heated Seat System circuit diagram (Refer to 8 - ELECTRICAL/HEATED SEATS - SCHEMATICS AND DIA-
GRAMS)
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:Ignition on.
•
Set Condition:This code is set whenever the Cluster detects the heated seat switch sense circuit is shorted
low.
Possible Causes
(P366) RIGHT HEATED SEAT SWITCH SENSE SHORTED TO GROUND
LOWER SWITCH BANK
CLUSTER
Diagnostic Test
1.
VERIFY THAT DTC B1088-RIGHT HEATED SEAT SWITCH INPUT CIRCUIT LOW 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 B1088 RIGHT HEATED SEAT SWITCH INPUT CIRCUIT LOW reset?
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.
Perform BODY VERIFICATION TEST – VER 1.
2.
HEATED SEAT SWITCH
With the scan tool, record and erase DTC’s
Disconnect the lower switch bank connector.
Cycle the ignition switch off then back on.
With the scan tool, read DTC’s.
Does the DTC B1088 RIGHT HEATED SEAT SWITCH INPUT CIRCUIT LOW reset?
Yes
>> Go To 3
No
>> Replace the lower switch bank.
Perform BODY VERIFICATION TEST – VER 1.
8G - 14
HEATED SEATS - ELECTRICAL DIAGNOSTICS
WK
B1088-RIGHT HEATED SEAT SWITCH INPUT CIRCUIT LOW (CONTINUED)
3.
CHECK THE (P366) RIGHT HEATED SEAT SWITCH SENSE CIRCUIT FOR A SHORT TO GROUND
Disconnect the Cluster C3 connector.
Measure the resistance between ground and the (P366) Right Heated
Seat Switch Sense circuit.
Was the resistance below 5.0 ohms?
Yes
>> Repair the (P366) Right Heated Seat Switch Sense circuit
for a short to ground.
Perform BODY VERIFICATION TEST – VER 1.
No
>> Replace the Cluster.
Perform BODY VERIFICATION TEST – VER 1.
WK
HEATED SEATS - ELECTRICAL DIAGNOSTICS
8G - 15
B1092-FRONT LEFT SEAT HEATER CONTROL CIRCUIT LOW
8G - 16
HEATED SEATS - ELECTRICAL DIAGNOSTICS
WK
B1092-FRONT LEFT SEAT HEATER CONTROL CIRCUIT LOW (CONTINUED)
For the Heated Seat System circuit diagram (Refer to 8 - ELECTRICAL/HEATED SEATS - SCHEMATICS AND DIA-
GRAMS)
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:Ignition on, during the heated seat operation.
•
Set Condition:This code is set immediately after the Heated Seat Module detects the control circuit shorted to
ground.
Possible Causes
(P187) LEFT SEAT HEATER B(+) DRIVER SHORTED TO GROUND
SEAT HEATER ELEMENT PIGTAIL HARNESS SHORTED
SEAT CUSHION HEATER ELEMENT SHORTED
SEAT BACK HEATER ELEMENT SHORTED
HEATED SEAT MODULE
Diagnostic Test
1.
VERIFY THAT DTC B1092-FRONT LEFT SEAT HEATER CONTROL CIRCUIT LOW IS ACTIVE
With the scan tool, record and erase DTC’s
Operate the Heated Seat Switch in both positions several times.
With the scan tool, read DTC’s.
Does the DTC B1092 FRONT LEFT SEAT HEATER CONTROL CIRCUIT LOW reset?
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.
Perform BODY VERIFICATION TEST – VER 1.
2.
DISCONNECT LEFT SEAT INLINE CONNECTOR AND READ DTC’S
Disconnect the left seat C306 inline connector.
NOTE: Check connectors - Clean and repair as necessary.
With the scan tool, erase HSM DTC’s
Operate the Heated Seat Switch in both positions several times.
With the scan tool, read DTC’s.
Does the scan tool display the same DTC?
Yes
>> Go To 6
No
>> Go To 3
WK
HEATED SEATS - ELECTRICAL DIAGNOSTICS
8G - 17
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