Jeep Grand Cherokee WK. Manual — part 390
REMOVAL
1. Disconnect and isolate the battery negative cable.
2. Remove the instrument panel center bezel, (Refer
to
23
-
BODY/INSTRUMENT PANEL/INSTRU-
MENT PANEL CENTER BEZEL - REMOVAL).
3. Remove the lower instrument panel switch pod fas-
teners.
4. Remove the lower instrument panel switch pod
from the vehicle.
INSTALLATION
NOTE: There are different instrument panel switch
pods available based on the option content of the
vehicle. Ensure the switch pod being installed
matches the vehicle options.
1. Position the lower instrument panel switch pod into
the instrument panel center bezel.
2. Install the lower instrument panel switch pod fas-
teners.
3. Install the instrument panel center bezel, (Refer to
23 - BODY/INSTRUMENT PANEL/INSTRUMENT
PANEL CENTER BEZEL - INSTALLATION).
4. Connect the battery negative cable.
5. Verify heated seat system operation.
8G - 66
HEATED SEATS - SERVICE INFORMATION
WK
HORN
TABLE OF CONTENTS
page
page
HORN - ELECTRICAL DIAGNOSTICS . . . . . . . . . . . 1
HORN SYSTEM - SERVICE INFORMATION . . . . . 17
HORN - ELECTRICAL DIAGNOSTICS
TABLE OF CONTENTS
page
page
HORN - ELECTRICAL DIAGNOSTICS
B2336–HORN CONTROL CIRCUIT LOW –
FCM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
B2337–HORN CONTROL CIRCUIT HIGH –
FCM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
B2339–HORN SWITCH STUCK — SCCM
HORN - ELECTRICAL DIAGNOSTICS
DIAGNOSIS AND TESTING
WK
HORN
8H - 1
B2336–HORN CONTROL CIRCUIT LOW – FCM
8H - 2
HORN - ELECTRICAL DIAGNOSTICS
WK
B2336–HORN CONTROL CIRCUIT LOW – FCM (CONTINUED)
For the Horn System circuit diagram (Refer to 8 - ELECTRICAL/HORN - SCHEMATICS AND DIAGRAMS).
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
Continuously
•
Set Condition:
If the Front Control Module (FCM) senses either excessively low or no voltage on the (X4) Horn Relay Control
circuit.
Possible Causes
(A43) FUSED B(+) CIRCUIT SHORTED TO GROUND
(X4) HORN RELAY CONTROL CIRCUIT SHORTED TO GROUND
(A1) / (A913) CIRCUIT OPEN TO HORN FUSE
(A43) FUSED B(+) CIRCUIT OPEN
(X4) HORN RELAY CONTROL CIRCUIT OPEN
HORN FUSE
HORN RELAY
INTEGRATED POWER MODULE (IPM)
FRONT CONTROL MODULE (FCM)
Diagnostic Test
1.
TEST FOR INTERMITTENT CONDITION
Turn the ignition on.
With the scan tool, record and erase DTCs.
Operate the Horn Switch several times.
Cycle the ignition from on to off 3 times and leave on.
With the scan tool, read DTCs.
Does the scan tool display: B2336 HORN CONTROL CIRCUIT LOW?
Yes
>> Go To 2
No
>> The conditions that caused this code to set are not present at this time. Using the wiring diagram/sche-
matic as a guide, inspect the wiring and connectors.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE).
WK
HORN - ELECTRICAL DIAGNOSTICS
8H - 3
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