Jeep Grand Cherokee WK. Manual — part 251
B147D-CHANNEL 6 AUDIO SPEAKER OUTPUT CIRCUIT SHORTED TOGETHER (CONTINUED)
For the Amplifier circuit diagram (Refer to 8 - ELECTRICAL/AUDIO - SCHEMATICS AND DIAGRAMS).
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
With the ignition on. Radio volume at 25 or higher.
•
Set Condition:
The amplifier detects that the output circuits are shorted together.
Possible Causes
(X206) AMPLIFIED RIGHT REAR DOOR SPEAKER (+) CIRCUIT SHORTED TO THE (X296) AMPLIFIED RIGHT
REAR DOOR SPEAKER (-) CIRCUIT
AMPLIFIED RIGHT REAR DOOR SPEAKER
AMPLIFIER
Diagnostic Test
1.
CHECK FOR AN INTERMITTENT CONDITION
Turn the ignition on, then off, and then on again.
With the scan tool, erase Amplifier DTCs.
Turn the radio on.
Turn the volume level to 25.
With the scan tool, read Amplifier DTCs.
Does the scan tool display active: B147D-CHANNEL 6 AUDIO
SPEAKER OUTPUT CIRCUIT SHORTED TOGETHER?
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.
2.
CHECK THE OPERATION OF THE AMPLIFIED RIGHT REAR DOOR SPEAKER
Disconnect the Amplified Right Rear Door Speaker.
Measure the resistance of the speaker between the two terminals.
Is the resistance of the speaker less than 1 ohm?
Yes
>> Replace the Amplified Right Rear Door Speaker in accordance with the service information.
Perform BODY VERIFICATION TEST VER-1.
No
>> Go To 3
8A - 140
AUDIO/VIDEO SYSTEMS - ELECTRICAL DIAGNOSIS
WK
B147D-CHANNEL 6 AUDIO SPEAKER OUTPUT CIRCUIT SHORTED TOGETHER (CONTINUED)
3.
CHECK THE (X206) AMPLIFIED RIGHT REAR DOOR SPEAKER (+) CIRCUIT, AND THE (X296) AMPLIFIED
RIGHT REAR DOOR SPEAKER (-) CIRCUITS FOR A SHORT TOGETHER
Turn the ignition off.
Disconnect the Amplifier C1 harness connector.
Measure the resistance between the (X206) Amplified Right Rear Door
Speaker (+) circuit, and the (X296) Amplified Right Rear Door Speaker
(-) circuit.
Is the resistance below 10K ohms?
Yes
>> Repair the (X206) Amplified Right Rear Door Speaker (+)
circuit, and the (X296) Amplified Right Rear Door Speaker
(-) circuit for a short together.
Perform BODY VERIFICATION TEST VER-1.
No
>> Replace the Amplifier in accordance with the service infor-
mation.
Perform BODY VERIFICATION TEST VER-1.
WK
AUDIO/VIDEO SYSTEMS - ELECTRICAL DIAGNOSIS
8A - 141
U0019–CAN B BUS
8A - 142
AUDIO/VIDEO SYSTEMS - ELECTRICAL DIAGNOSIS
WK
U0019–CAN B BUS (CONTINUED)
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
Continuously.
•
Set Condition:
Whenever the Can B Bus (+) or B Bus (–) circuit is open, shorted to voltage or shorted to ground, this
code will set.
Possible Causes
CAN B BUS DTCs IN FRONT CONTROL MODULE
(D54) CAN B BUS (–) CIRCUIT OPEN
(D55) CAN B BUS (+) CIRCUIT OPEN
AMPLIFIER
Diagnostic Test
1.
TEST FOR INTERMITTENT CONDITION
Turn the ignition on.
With the scan tool, record and erase DTCs
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read DTCs.
Does the scan tool display U0019–CAN B BUS CIRCUIT?
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.
2.
CHECK FRONT CONTROL MODULE DTCs
With the scan tool, read Front Control Module DTCs
Does the scan tool display any CAN B BUS DTCs – ACTIVE?
Yes
>> Refer to the symptom list for problems related to Communication in the ELECTRICAL.– ELECTRONIC
CONTROL MODULES – ELECTRICAL DIAGNOSES section.
No
>> Go to 3
WK
AUDIO/VIDEO SYSTEMS - ELECTRICAL DIAGNOSIS
8A - 143
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