Jeep Grand Cherokee WK. Manual — part 525
B1D87–SEAT RECLINER MOTOR CONTROL CIRCUIT PERFORMANCE
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POWER SEATS - ELECTRICAL DIAGNOSTICS
WK
B1D87–SEAT RECLINER MOTOR CONTROL CIRCUIT PERFORMANCE (CONTINUED)
For the Power Seat System circuit diagram (Refer to 8 - ELECTRICAL/POWER SEATS - SCHEMATICS AND DIA-
GRAMS)
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
Whenever the seat motor is activated.
•
Set Condition:
If the Memory Seat Module does not detect the rotation of the seat motor this DTC will set. This DTC will only
set when the seat switch is moved in the same direction three consecutive times.
Possible Causes
SEAT POSITION SENSOR CIRCUIT DIAGNOSTIC TROUBLE CODES
(G403) DRIVER SEAT RECLINER POSITION SENSE CIRCUIT OPEN
(G493) DRIVER SEAT RECLINER POSITION SENSOR GROUND CIRCUIT OPEN
(P141) DRIVER SEAT RECLINER UP DRIVER
(P143) DRIVER SEAT RECLINER DOWN DRIVER
DRIVER RECLINER SEAT ADJUSTER MOTOR
MEMORY SEAT MODULE
Diagnostic Test
1.
CHECK FOR RELATED DIAGNOSTIC TROUBLE CODES
Turn the ignition on.
With the scan tool, read DTC’s.
Does the scan tool display any seat position sensor DTC’s?
Yes
>> Diagnose and repair the other DTC(s) first. Refer to the Table of Contents in this Section for a complete
list of symptoms.
No
>> Go To 2
2.
TEST FOR INTERMITTENT CONDITION
Turn the ignition on.
With the scan tool, record and erase DTC’s
Move the Seat Switch in the Recliner position 3 times.
With the scan tool, read DTC’s.
Does the scan tool display B1D7B–SEAT BACKREST MOTOR CONTROL CIRCUIT PERFORMANCE?
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 POWER SEAT SYSTEM VERIFICATION TEST - VER 1.
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POWER SEATS - ELECTRICAL DIAGNOSTICS
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B1D87–SEAT RECLINER MOTOR CONTROL CIRCUIT PERFORMANCE (CONTINUED)
3.
CHECK THE (G403) DRIVER SEAT RECLINER POSITION SENSE VOLTAGE
Disconnect the Driver Recliner Seat Adjuster Motor.
NOTE: Check connectors – Clean and repair as necessary.
Move the Seat Switch in the Recliner position during the next step.
Using a 12-volt test light connect one lead to the (G403) Driver Seat
Recliner Position Sense circuit and the other lead to Driver Seat
Recliner Position Sensor Ground at the Driver Recliner Seat Adjuster
Motor connector.
Does the test light illuminate for approximately 2 seconds then
turn off with the seat switch engaged?
Yes
>> Go To 4
No
>> Go To 5
4.
CHECK THE DRIVER SEAT RECLINER FORWARD/REARWARD DRIVER VOLTAGE
Move the Seat Switch in the Recliner position during the next step.
Using a 12-volt test light connect one lead to the (P141) Driver Seat
Recliner Up Driver circuit and the other lead to (P143) Driver Seat
Recliner Down Driver circuit at the Driver Recliner Seat Adjuster Motor
connector.
Does the test light illuminate with the seat switch engaged?
Yes
>> Replace the Recliner motor assembly.
Perform POWER SEAT SYSTEM VERIFICATION TEST –
VER 1
No
>> Go To 7
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POWER SEATS - ELECTRICAL DIAGNOSTICS
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B1D87–SEAT RECLINER MOTOR CONTROL CIRCUIT PERFORMANCE (CONTINUED)
5.
CHECK THE (G403) DRIVER SEAT RECLINER POSITION SENSE WIRE FOR AN OPEN
Disconnect the Memory Seat Module C2 connector.
NOTE: Check connectors – Clean and repair as necessary.
Measure the resistance of the (G403) Driver Seat Recliner Position
Sense circuit at the Driver Recliner Seat Adjuster Motor connector to
the C2 connector.
Is the resistance above 1.0 ohm?
Yes
>> Repair the (G403) Driver Seat Recliner Position Sense cir-
cuit for an open.
Perform POWER SEAT SYSTEM VERIFICATION TEST –
VER 1
No
>> Go To 6
WK
POWER SEATS - ELECTRICAL DIAGNOSTICS
8N - 263
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