Jeep Grand Cherokee WK. Manual — part 520
B1D7A–SEAT RECLINER POSITION SENSOR CIRCUIT HIGH
8N - 240
POWER SEATS - ELECTRICAL DIAGNOSTICS
WK
B1D7A–SEAT RECLINER POSITION SENSOR CIRCUIT HIGH (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:
When the seat motor is activated (sensor supply voltage is switched on whenever motor is activated).
•
Set Condition:
If during motor operation the sensor voltage is not within a specified range this code will set. This DTC will
only set when the seat switch is moved in the same direction three consecutive times.
Possible Causes
(G403) DRIVER SEAT RECLINER POSITION SENSE CIRCUIT SHORTED TO VOLTAGE
DRIVER RECLINER SEAT ADJUSTER MOTOR
MEMORY SEAT MODULE
Diagnostic Test
1.
TEST FOR INTERMITTENT CONDITION
Turn the ignition on.
With the scan tool, record and erase DTC’s
Move the seat switch recliner position 3 times.
With the scan tool, read DTC’s.
Does the scan tool display B1D7A–SEAT BACKREST POSITION SENSOR CIRCUIT HIGH?
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 POWER SEAT SYSTEM VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/POWER
SEATS - DIAGNOSIS AND TESTING)
2.
CHECK THE (G403) DRIVER SEAT RECLINER POSITION SENSE VOLTAGE
Disconnect the Driver Recliner Seat Adjuster Motor.
NOTE: Check connectors – Clean and repair as necessary.
With the scan tool erase DTC’s
Move the seat switch in the both recliner positions 3 times.
With the scan tool, read DTC’s.
Does the same DTC reset?
No
>> Inspect the position sense wire for a possible intermittent short to voltage from another circuit, if OK
replace the Driver Recliner Seat Adjuster Motor assembly.
Perform POWER SEAT SYSTEM VERIFICATION TEST – VER 1 (Refer to 8 - ELECTRICAL/POWER
SEATS - DIAGNOSIS AND TESTING)
Yes
>> Inspect the position sense wire for a possible short to voltage from another circuit, if OK replace the
Memory Seat Module.
Perform POWER SEAT SYSTEM VERIFICATION TEST – VER 1 (Refer to 8 - ELECTRICAL/POWER
SEATS - DIAGNOSIS AND TESTING)
WK
POWER SEATS - ELECTRICAL DIAGNOSTICS
8N - 241
B1D7B–SEAT HORIZONTAL MOTOR CONTROL CIRCUIT PERFORMANCE
8N - 242
POWER SEATS - ELECTRICAL DIAGNOSTICS
WK
B1D7B–SEAT HORIZONTAL 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
(G401) DRIVER SEAT HORIZONTAL POSITION SENSE CIRCUIT OPEN
(G491) DRIVER SEAT HORIZONTAL SENSOR GROUND CIRCUIT OPEN
(P115) DRIVER SEAT HORIZONTAL FORWARD DRIVER
(P117) DRIVER SEAT HORIZONTAL REARWARD DRIVER
DRIVER HORIZONTAL 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 Horizontal position 3 times.
With the scan tool, read DTC’s.
Does the scan tool display B1D7B–SEAT HORIZONTAL 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. (Refer to 8 - ELECTRICAL/POWER
SEATS - DIAGNOSIS AND TESTING)
WK
POWER SEATS - ELECTRICAL DIAGNOSTICS
8N - 243
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