Jeep Grand Cherokee WK. Manual — part 411
B1243-REAR PARK ASSIST DISABLE SWITCH STUCK (CONTINUED)
For the Instrument Cluster circuit diagram (Refer to 8 - ELECTRICAL/INSTRUMENT CLUSTER - SCHEMATICS
AND DIAGRAMS).
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
With the ignition on.
•
Set Condition:
The Instrument Cluster detects the Rear Park Assist Disable Switch active for greater than 20 seconds.
Possible Causes
(X774) PARK ASSIST ON/OFF SWITCH CIRCUIT SHORT TO GROUND
LOWER SWITCH BANK
INSTRUMENT CLUSTER
Diagnostic Test
1.
CHECK FOR ACTIVE DTC
Press and release the switch three times.
Turn the ignition on.
With the scan tool, record and erase Instrument Cluster DTCs.
Turn the ignition off.
Turn the ignition on.
Wait 30 seconds.
With the scan tool, read Instrument Cluster DTCs.
Is DTC: B1243-REAR PARK ASSIST DISABLE SWITCH STUCK 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)
8J - 18
INSTRUMENT CLUSTER - ELECTRICAL DIAGNOSTICS
WK
B1243-REAR PARK ASSIST DISABLE SWITCH STUCK (CONTINUED)
2.
CHECK OPERATION OF THE LOWER SWITCH BANK
Turn the ignition off.
Disconnect the Lower Switch Bank Harness Connector.
Turn the ignition on.
Wait 30 seconds.
With the scan tool, read Instrument Cluster DTCs.
Does the scan tool display DTC: B1243-REAR PARK ASSIST
DISABLE SWITCH STUCK?
Yes
>> Go To 3
No
>> Replace the Lower Switch Bank in accordance with the
service information.
Perform BODY VERIFICATION TEST VER 1. (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL
MODULES
-
STANDARD PROCEDURE)
3.
CHECK THE (X774) PARK ASSIST ON/OFF SWITCH CIRCUIT FOR A SHORT TO GROUND
Turn the ignition off.
Disconnect the Instrument Cluster C1 harness connector.
Measure the resistance of the (X774) Park Assist ON/OFF Switch cir-
cuit for a short to ground.
Is the resistance below 10K ohms?
Yes
>> Repair the (X774) Park Assist ON/OFF Switch circuit for a
short to ground.
Perform BODY VERIFICATION TEST VER 1. (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL
MODULES
-
STANDARD PROCEDURE)
No
>> Replace the Instrument Cluster in accordance with the ser-
vice information.
Perform BODY VERIFICATION TEST VER 1. (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL
MODULES
-
STANDARD PROCEDURE)
WK
INSTRUMENT CLUSTER - ELECTRICAL DIAGNOSTICS
8J - 19
B160A-PANEL DIMMER INPUT CIRCUIT LOW (SCM)
For the Instrument Cluster circuit diagram (Refer to 8 - ELECTRICAL/INSTRUMENT CLUSTER - SCHEMATICS
AND DIAGRAMS).
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
With the SCM awake.
•
Set Condition:
Panel Dimmer Input less than 0.5 volts.
Possible Causes
LIGHTING MULTI-FUNCTION SWITCH
STEERING CONTROL MODULE
Diagnostic Test
1.
INTERMITTENT CONDITION
Turn the ignition on.
With the Scan Tool, clear all SCM DTC’s.
Turn the Panel Illumination ON then OFF.
With the Scan Tool, read the SCM DTC’s.
Does the Scan Tool read: B160A-PANEL DIMMER INPUT CIRCUIT LOW?
Yes
>> Go To 2
No
>> The condition that caused the symptom is currently not present. Inspect the related wiring for a possible
intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires.
Perform the BODY VERIFICATION TEST — VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES - STANDARD PROCEDURE)
2.
MULTIFUNCTION SWITCH
Turn the ignition off.
Using the correct service procedure, remove the Lighting Multi-Function Switch.
Measure the internal resistance of the Multifunction Switch between cavities 10 and 11. Move the switch position
from DOME DEFEAT to DOME LAMPS while measuring.
DOME DEFEAT = 0 ohms
DIM 1 = 118 ohms
DIM 2 = 224 ohms
DIM 3 = 450 ohms
DIM 4 = 1099 ohms
DIM 5 = 1099 ohms
DIM 6 = 1099 ohms
PARADE = 1099 ohms
DOME LAMPS = 1099 ohms
Is the resistance in each position correct?
Yes
>> Go To 3
No
>> Replace the Multifunction Switch in accordance with the service information.
Perform the BODY VERIFICATION TEST — VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES - STANDARD PROCEDURE)
8J - 20
INSTRUMENT CLUSTER - ELECTRICAL DIAGNOSTICS
WK
B160A-PANEL DIMMER INPUT CIRCUIT LOW (SCM) (CONTINUED)
3.
MULTIFUNCTION SWITCH
Turn the ignition off.
Using the correct service procedure, remove the Lighting Multi-Function Switch.
Measure the internal resistance of the Multifunction Switch between cavities 9 and 11. Move the switch position from
DOME DEFEAT to DOME LAMPS while measuring.
DOME DEFEAT = 1099 ohms
DIM 1 = 1099 ohms
DIM 2 = 1099 ohms
DIM 3 = 1099 ohms
DIM 4 = 1099 ohms
DIM 5 = 450 ohms
DIM 6 = 224 ohms
PARADE = 118 ohms
DOME LAMPS = 0 ohms
Is the resistance in each position correct?
Yes
>> Replace the Steering Control Module in accordance with the service information.
Perform the BODY VERIFICATION TEST — VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES - STANDARD PROCEDURE)
No
>> Replace the Multifunction Switch in accordance with the service information.
Perform the BODY VERIFICATION TEST — VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES - STANDARD PROCEDURE)
WK
INSTRUMENT CLUSTER - ELECTRICAL DIAGNOSTICS
8J - 21
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст