Jeep Grand Cherokee WK. Manual — part 278

B2127-SENSOR SUPPLY VOLTAGE HIGH

8B - 38

CHIME/BUZZER - ELECTRICAL DIAGNOSTICS

WK

B2127-SENSOR SUPPLY VOLTAGE HIGH (CONTINUED)

For the Park Assist circuit diagram (Refer to 8 - ELECTRICAL/CHIME/BUZZER - SCHEMATICS AND DIAGRAMS).

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:
Park Assist Sensor supply voltage greater than 9.2 volts.

Possible Causes

(X700) PARK ASSIST SENSOR SUPPLY CIRCUIT SHORT TO VOLTAGE

PARK ASSIST MODULE

Diagnostic Test

1.

CHECK FOR ACTIVE DTC: B2127-SENSOR SUPPLY VOLTAGE HIGH

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: B2127-SENSOR SUPPLY VOLTAGE HIGH 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.

CHECK THE (X700) PARK ASSIST SENSOR SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE

Turn the ignition off.

Disconnect the Park Assist Module harness connector.

Turn the ignition on.

Measure the voltage on the (X700) Park Assist Sensor Supply circuit.

Is the voltage above 9.2 volts?

Yes

>> Repair the (X700) Park Assist Sensor Supply circuit for a

short to voltage.

Perform BODY VERIFICATION TEST - VER 1. (Refer to 8
- ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE)

No

>> Replace the Park Assist Module 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 - 39

B212A-PTS DISPLAY SUPPLY VOLTAGE LOW

8B - 40

CHIME/BUZZER - ELECTRICAL DIAGNOSTICS

WK

B212A-PTS DISPLAY SUPPLY VOLTAGE LOW (CONTINUED)

For the Park Assist circuit diagram (Refer to 8 - ELECTRICAL/CHIME/BUZZER - SCHEMATICS AND DIAGRAMS).

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:
Park Assist Sensor Display voltage less than 8.0 volts.

Possible Causes

(X777) PARK ASSIST DISPLAY SUPPLY CIRCUIT SHORT TO GROUND

(X777) PARK ASSIST DISPLAY SUPPLY CIRCUIT SHORT TO (Z171) PARK ASSIST DISPLAY GROUND
CIRCUIT

(X777) PARK ASSIST DISPLAY SUPPLY CIRCUIT SHORT TO (Z913) PARK ASSIST MODULE GROUND
CIRCUIT

(X777) PARK ASSIST DISPLAY SUPPLY CIRCUIT SHORT TO (X750) PARK ASSIST SENSOR GROUND
CIRCUIT

PARK ASSIST DISPLAY

PARK ASSIST MODULE

Diagnostic Test

1.

CHECK FOR ACTIVE DTC: B212A-PTS DISPLAY SUPPLY VOLTAGE 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: B212A-PTS DISPLAY SUPPLY VOLTAGE 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 - 41