Jeep Grand Cherokee WK. Manual — part 269
HEATED SEAT CONTROL MODULE . . . . . . . 60
MEMORY SEAT CONTROL MODULE . . . . . . . 60
SCCM-CAN-B . . . . . . . . . . . . . . . . . . . . . . . . 61
U0231-LOST COMMUNICATION WITH RAIN
SENSING MODULE . . . . . . . . . . . . . . . . . . . . 61
U0241-LOST COMMUNICATION WITH AUTO
HIGHBEAM HEADLAMP CONTROL
MODULE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
CHIME/BUZZER - ELECTRICAL DIAGNOSTICS
DIAGNOSIS AND TESTING
8B - 2
CHIME/BUZZER - ELECTRICAL DIAGNOSTICS
WK
B122C-PTS SENSOR 7 CIRCUIT LOW
WK
CHIME/BUZZER - ELECTRICAL DIAGNOSTICS
8B - 3
B122C-PTS SENSOR 7 CIRCUIT LOW (CONTINUED)
For the Park Assist circuit diagram (Refer to 8 - ELECTRICAL/CHIME/BUZZER - SCHEMATIC - ELECTRICAL).
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
While the vehicle is in reverse for speeds less than 16km/h.
•
Set Condition:
Sensor ring down time is too short (700 µsecs).
Possible Causes
(D700) PARK ASSIST SENSOR NO. 7 SIGNAL CIRCUIT SHORTED TO (X750) PARK ASSIST SENSOR
GROUND CIRCUIT
(D700) PARK ASSIST SENSOR NO. 7 SIGNAL CIRCUIT SHORTED TO (Z171) PARK ASSIST DISPLAY
GROUND CIRCUIT
(D700) PARK ASSIST SENSOR NO. 7 SIGNAL CIRCUIT SHORTED TO (Z914) PARK ASSIST MODULE
GROUND CIRCUIT
(D700) PARK ASSIST SENSOR NO. 7 SIGNAL CIRCUIT SHORTED TO GROUND
PARK ASSIST SENSOR NO. 7
PARK ASSIST MODULE
Diagnostic Test
1.
CHECK FOR ACTIVE DTC: B122C-PTS SENSOR 7 CIRCUIT LOW
Turn the ignition on.
Apply the vehicle park brake.
Shift the transmission into reverse.
With the scan tool, record and erase Park Assist Module DTCs.
Wait 30 seconds.
With the scan tool, read Park Assist Module DTCs.
Is DTC: B122C-PTS SENSOR 7 CIRCUIT LOW active?
Yes
>> Go To 2
No
>> The condition that caused this code to set is not present at this time. Check for an intermittent condition
by inspecting the related wiring harness for chaffed, pierced, pinched, and partially broken wires. Also
inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated termi-
nals.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE)
8B - 4
CHIME/BUZZER - ELECTRICAL DIAGNOSTICS
WK
B122C-PTS SENSOR 7 CIRCUIT LOW (CONTINUED)
2.
CHECK PARK ASSIST SENSOR NO. 7 FOR A SHORT TO GROUND
Shift the transmission into park.
With the scan tool, erase DTCs.
Turn the ignition off.
Disconnect Park Assist Sensor No. 7.
Turn the ignition on.
Shift the transmission into reverse.
With the scan tool, read Park Assist Module DTCs.
Does the scan tool display: B122C-PTS SENSOR 7 CIRCUIT
LOW?
Yes
>> Go To 3
No
>> Replace Park Assist Sensor No. 7 in accordance with the
service information.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8
- ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE)
3.
CHECK THE (D700) PARK ASSIST SENSOR NO. 7 SIGNAL CIRCUIT FOR A SHORT TO (X750) PARK
ASSIST SENSOR GROUND CIRCUIT
Turn the ignition off.
Disconnect the Park Assist Module harness connector.
Measure the resistance between the (D700) Park Assist Sensor No. 7
Signal circuit and the (X750) Park Assist Sensor Ground circuit.
Is the resistance below 10K ohms?
Yes
>> Repair the (D700) Park Assist Sensor No. 7 Signal circuit
for a short to the (X750) Park Assist Sensor Ground cir-
cuit.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8
- ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE)
No
>> Go To 4
WK
CHIME/BUZZER - ELECTRICAL DIAGNOSTICS
8B - 5
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