Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 454
•
When Monitored:
Continuously
•
Set Condition:
When the Front Control Module does not detect voltage on the Horn Relay Control circuit.
Possible Causes
HORN FUSE
B(+) OPEN
RELAY
POWER DISTRIBUTION CENTER
FRONT CONTROL MODULE
Diagnostic Test
1.
TEST FOR INTERMITTENT CONDITION
With the scan tool, record and erase DTC’s
Operate the Horn Switch several times.
Cycle the ignition from on to off 3 times and leave on.
With the scan tool, read DTC’s.
Does the scan tool display B2338 – HORN CONTROL CIRCUIT
OPEN?
Yes
>> Go To 2
No
>> The conditions that caused this code to set are not present
at this time. Using the wiring diagram/schematic as a guide,
inspect the wiring and connectors.
Perform BODY VERIFICATION TEST - VER 1. (Refer to
BODY VERIFICATION TEST - VER 1).
2.
HORN FUSE
Using a 12-volt test light connected to ground, check the Horn fuse.
Does the test light illuminate and was the fuse OK?
No
>> Replace the horn fuse if open and check for a short to ground on the Horn Relay Output circuit or
correct the open B(+) circuit to the fuse.
Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST - VER 1).
Yes
>> Go To 3
8H - 14
HORN - ELECTRICAL DIAGNOSTICS
LX
3.
OPEN FUSED B(+) TO RELAY
Remove the Horn Relay from the PDC.
Using a 12-volt test light connected to ground, check the Fused B(+)
circuit at the relay connector.
Does the test light illuminate?
No
>> Replace the Power Distribution Center.
Perform BODY VERIFICATION TEST - VER 1. (Refer to
BODY VERIFICATION TEST - VER 1).
Yes
>> Go To 4
4.
HORN RELAY
Install a known good relay in place of the Horn Relay.
With the scan tool erase DTC’s
Operate the Horn Switch several times.
Cycle the ignition from on to off 3 times and leave on.
With the scan tool, read DTC’s.
Does the scan tool display B2338 – HORN CONTROL CIRCUIT OPEN?
No
>> Replace the original Horn Relay.
Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST - VER 1).
Yes
>> Go To 5
5.
(X4)HORN RELAY CONTROL OPEN
Measure the resistance of the (X4)Horn Relay Control circuit from the
relay connector to FCM connector.
Is the resistance below 3.0 ohms?
Yes
>> Replace the Front Control Module.
Perform BODY VERIFICATION TEST - VER 1. (Refer to
BODY VERIFICATION TEST - VER 1).
No
>> Replace the Power Distribution Center.
Perform BODY VERIFICATION TEST - VER 1. (Refer to
BODY VERIFICATION TEST - VER 1).
LX
HORN - ELECTRICAL DIAGNOSTICS
8H - 15
HORN SYSTEM- SERVICE INFORMATION
TABLE OF CONTENTS
page
page
HORN SYSTEM- SERVICE INFORMATION
HORN
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
SWITCH-HORN
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
DIAGNOSIS AND TESTING
HORN SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
8H - 16
HORN SYSTEM- SERVICE INFORMATION
LX
HORN SYSTEM- SERVICE INFORMATION
DESCRIPTION
The dual-note horn system features two electromag-
netic horn units. The horn system includes the follow-
ing major components:
•
Horn - The two horns are located behind the
grille below a trim cover.
•
Horn Switch - The horn switch is molded into
the driver airbag trim cover.
OPERATION
The horn system operates on battery current received through a fuse in the Integrated Power Module (IPM). The
horn system circuit is designed so that the system will remain operational, regardless of the ignition switch position.
DIAGNOSIS AND TESTING - HORN SYSTEM
The most reliable, efficient, and accurate means to diagnose the horn system requires the use of a scan
tool and the proper Diagnostic Procedures information.
Refer to the appropriate wiring information.
In most cases, any problem involving continually sounding horns can be quickly alleviated by removing the horn
fuse from the Integrated Power Module (IPM).
WARNING: DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING
COLUMN, SEAT BELT TENSIONER, SIDE AIRBAG, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MIN-
UTES FOR THE AIRBAG SYSTEM CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNO-
SIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE TO TAKE
THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE
PERSONAL INJURY.
LX
HORN SYSTEM- SERVICE INFORMATION
8H - 17
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст