Jeep Grand Cherokee WK. Manual — part 274
B1238-PTS SENSOR 9 RING TIME TOO SHORT
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 exceeds limit (greater than 1450 µsecs).
Possible Causes
PARK ASSIST SENSOR NO. 9
Diagnostic Test
1.
CHECK FOR ACTIVE DTC: B1238-PTS SENSOR 9 RING TIME TOO SHORT
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: B1238-PTS SENSOR 9 RING TIME TOO SHORT 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)
2.
REPLACE PARK ASSIST SENSOR NO. 9
View Repair
Repair
Replace Park Assist Sensor No. 9 in accordance with the service information.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE)
8B - 22
CHIME/BUZZER - ELECTRICAL DIAGNOSTICS
WK
B1239-PTS SENSOR 9 RING TIME TOO LONG
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:
Data line stuck at 0.
Possible Causes
PARK ASSIST SENSOR N0. 9
Diagnostic Test
1.
CHECK FOR ACTIVE DTC: B1239-PTS SENSOR 9 RING TIME TOO LONG
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: B1239-PTS SENSOR 9 RING TIME TOO LONG 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)
2.
REPLACE PARK ASSIST SENSOR NO. 9
View Repair
Repair
Replace Park Assist Sensor No. 9 in accordance with the service information.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE)
WK
CHIME/BUZZER - ELECTRICAL DIAGNOSTICS
8B - 23
B123B-PTS SENSOR 10 CIRCUIT LOW
8B - 24
CHIME/BUZZER - ELECTRICAL DIAGNOSTICS
WK
B123B-PTS SENSOR 10 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
(D704) PARK ASSIST SENSOR NO. 10 SIGNAL CIRCUIT SHORTED TO (X750) PARK ASSIST SENSOR
GROUND CIRCUIT
(D704) PARK ASSIST SENSOR NO. 10 SIGNAL CIRCUIT SHORTED TO (Z171) PARK ASSIST DISPLAY
GROUND CIRCUIT
(D704) PARK ASSIST SENSOR NO. 10 SIGNAL CIRCUIT SHORTED TO (Z913) PARK ASSIST MODULE
GROUND CIRCUIT
(D704) PARK ASSIST SENSOR NO. 10 SIGNAL CIRCUIT SHORTED TO GROUND
PARK ASSIST SENSOR NO. 10
PARK ASSIST MODULE
Diagnostic Test
1.
CHECK FOR ACTIVE DTC: B123B-PTS SENSOR 10 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: B123B-PTS SENSOR 10 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)
WK
CHIME/BUZZER - ELECTRICAL DIAGNOSTICS
8B - 25
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