Jeep Grand Cherokee WK. Manual — part 412
B160B-PANEL DIMMER INPUT CIRCUIT HIGH (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 Instrument Cluster awake.
•
Set Condition:
Panel Dimmer Input greater than 4.8 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: B160B-PANEL DIMMER INPUT CIRCUIT HIGH?
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 - 22
INSTRUMENT CLUSTER - ELECTRICAL DIAGNOSTICS
WK
B160B-PANEL DIMMER INPUT CIRCUIT HIGH (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 - 23
B1612-PANEL ILLUMINATION CONTROL CIRCUIT
8J - 24
INSTRUMENT CLUSTER - ELECTRICAL DIAGNOSTICS
WK
B1612-PANEL ILLUMINATION CONTROL CIRCUIT (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, and the Panel Illumination active.
•
Set Condition:
Panel Illumination Status HIGH.
Possible Causes
(E2) PANEL LAMPS DRIVER CIRCUIT SHORTED TO GROUND
(E2) PANEL LAMPS DRIVER CIRCUIT SHORTED TO VOLTAGE
UPPER SWITCH BANK SHORTED TO GROUND
LOWER SWITCH BANK SHORTED TO GROUND
A/C HEATER CONTROL SHORTED TO GROUND
TRANSFER CASE SWITCH SHORTED TO GROUND
SHIFTER ASSEMBLY SHORTED TO GROUND
INSTRUMENT CLUSTER
Diagnostic Test
1.
CHECK FOR AN ACTIVE DTC
Turn the ignition on.
With the scan tool, record and erase DTCs.
Activate the Panel Illumination.
Wait 30 seconds.
With the scan tool, read DTCs.
Is the DTC 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 BODY VERIFICATION TEST - VER 1).
WK
INSTRUMENT CLUSTER - ELECTRICAL DIAGNOSTICS
8J - 25
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