Jeep Grand Cherokee WK. Manual — part 514
POWER SEATS - ELECTRICAL DIAGNOSTICS
TABLE OF CONTENTS
page
page
POWER SEATS - ELECTRICAL DIAGNOSTICS
B1D6D–SEAT HORIZONTAL POSITION
SENSOR CIRCUIT LOW . . . . . . . . . . . . . . . . 222
B1D6E–SEAT HORIZONTAL POSITION
SENSOR CIRCUIT HIGH . . . . . . . . . . . . . . . 225
B1D71–SEAT FRONT VERTICAL POSITION
SENSOR CIRCUIT LOW . . . . . . . . . . . . . . . . 227
B1D72–SEAT FRONT VERTICAL POSITION
SENSOR CIRCUIT HIGH . . . . . . . . . . . . . . . 230
B1D75–SEAT REAR VERTICAL POSITION
SENSOR CIRCUIT LOW . . . . . . . . . . . . . . . . 232
B1D76–SEAT REAR VERTICAL POSITION
SENSOR CIRCUIT HIGH . . . . . . . . . . . . . . . 235
SENSOR CIRCUIT LOW . . . . . . . . . . . . . . . . 237
SENSOR CIRCUIT HIGH . . . . . . . . . . . . . . . 240
CONTROL CIRCUIT PERFORMANCE . . . . . 242
B1D7F–SEAT FRONT VERTICAL MOTOR
CONTROL CIRCUIT PERFORMANCE . . . . . 248
B1D83–SEAT REAR VERTICAL MOTOR
CONTROL CIRCUIT PERFORMANCE . . . . . 254
B1D87–SEAT RECLINER MOTOR CONTROL
CIRCUIT PERFORMANCE . . . . . . . . . . . . . . 260
B1D9B–SEAT HORIZONTAL FRONT STOP
NOT LEARNED . . . . . . . . . . . . . . . . . . . . . . 267
INTERNAL . . . . . . . . . . . . . . . . . . . . . . . . . . 272
U0020-CAN B BUS OFF PERFORMANCE
U0021-CAN B BUS (+) CIRCUIT OPEN
U0022-CAN B BUS (+) CIRCUIT LOW
U0023-CAN B BUS (+) CIRCUIT HIGH
U0024-CAN B BUS (-) CIRCUIT OPEN
U0025-CAN B BUS (-) CIRCUIT LOW
U0026-CAN B BUS (-) CIRCUIT HIGH
FRONT CONTROL MODULE . . . . . . . . . . . . 282
OCCUPANT RESTRAINT CONTROLLER . . . 282
OCCUPANT CLASSIFICATION MODULE . . . 282
CLUSTER/CCN . . . . . . . . . . . . . . . . . . . . . . 282
U0156-LOST COMMUNICATION WITH EOM
PARKING ASSIST CONTROL MODULE . . . . 282
U0164-LOST COMMUNICATION WITH HVAC
CONTROL MODULE . . . . . . . . . . . . . . . . . . 282
VEHICLE SECURITY CONTROL MODULE
(SKREEM/WCM) . . . . . . . . . . . . . . . . . . . . . 283
SUNROOF CONTROL MODULE . . . . . . . . . . 283
HEADLAMP LEVEL TRANSLATOR . . . . . . . . 283
RADIO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283
AUDIO AMPLIFIER . . . . . . . . . . . . . . . . . . . . 283
SDARS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283
VEHICLE ENTERTAINMENT CONTROL
MODULE . . . . . . . . . . . . . . . . . . . . . . . . . . . 283
HANDS FREE PHONE . . . . . . . . . . . . . . . . . 283
DRIVER DOOR MODULE . . . . . . . . . . . . . . . 283
PASSENGER DOOR MODULE . . . . . . . . . . . 284
HEATED SEAT CONTROL MODULE . . . . . . 284
SCCM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284
U0231-LOST COMMUNICATION WITH RAIN
SENSING MODULE . . . . . . . . . . . . . . . . . . . 284
U0241-LOST COMMUNICATION WITH AUTO
HIGHBEAM HEADLAMP CONTROL
MODULE . . . . . . . . . . . . . . . . . . . . . . . . . . . 284
POWER SEAT SYSTEM VERIFICATION
TEST – VER 1 . . . . . . . . . . . . . . . . . . . . . . . 285
8N - 216
POWER SEATS - ELECTRICAL DIAGNOSTICS
WK
POWER SEATS - ELECTRICAL DIAGNOSTICS
DIAGNOSIS AND TESTING
B1D62–POWER SEAT SWITCH STUCK
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:
Continuously
•
Set Condition:
When the Memory Seat Module detects the switch engaged in an active position for over 50 seconds, this
code will set.
Possible Causes
DRIVER SEAT SWITCH
Diagnostic Test
1.
TEST FOR INTERMITTENT CONDITION
Turn the ignition on.
With the scan tool, record and erase DTC’s
Press the Seat Switch in all directions several times.
Wait one minute.
With the scan tool, read DTC’s.
Does the scan tool display B1D62–POWER SEAT SWITCH STUCK?
Yes
>> Replace the Driver Seat Switch as necessary.
Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1.
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 - 217
B1D63–POWER SEAT SWITCH OPEN
8N - 218
POWER SEATS - ELECTRICAL DIAGNOSTICS
WK
B1D63–POWER SEAT SWITCH OPEN (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:
Continuously
•
Set Condition:
When the Memory Seat Module detects an open driver seat switch MUX circuit this code will set.
Possible Causes
(P239) DRIVER SEAT REAR VERTICAL/HORIZONTAL SWITCH MUX OPEN
(P339) DRIVER SEAT FRONT VERTICAL/RECLINER SWITCH MUX OPEN
(P599) DRIVER SEAT SWITCH MUX RETURN OPEN
DRIVER SEAT SWITCH
MEMORY SEAT MODULE
Diagnostic Test
1.
TEST FOR INTERMITTENT CONDITION
Turn the ignition on.
With the scan tool, record and erase DTC’s
Press the Seat Switch in all directions several times.
Wait one minute.
With the scan tool, read DTC’s.
Does the scan tool display B1D63–POWER SEAT SWITCH OPEN?
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 (P239) DRIVER SEAT REAR VERTICAL/HORIZONTAL SWITCH MUX CIRCUIT RESISTANCE
Disconnect the Memory Seat Module C4 connector.
NOTE: Check connectors - Clean and repair as necessary.
Measure the resistance between the (P239) Driver Seat Rear Vertical/
Horizontal Switch MUX circuit and the (P599) Driver Seat Switch MUX
Return circuit in the C4 connector.
Is the resistance 47.0 ohms + or – 1.0?
Yes
>> Go To 3
No
>> Go To 5
WK
POWER SEATS - ELECTRICAL DIAGNOSTICS
8N - 219
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