Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 773
B1A3F-ITM ARMING SEQUENCE PERFORMANCE
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
During the VTSS pre-arm process.
•
Set Condition:
ITM losses battery voltage.
Possible Causes
CAN B BUS COMMUNICATION PROBLEMS
INTERMITTENT LOSS OF FUSED B(+) TO THE ITM DURING THE VTSS PRE-ARM PROCESS
Diagnostic Test
1.
DETERMINING IF DTC IS CURRENT
NOTE: Diagnose any related Communication DTC(s) before continuing.
With a scan tool, read and record DTC(s).
With the scan tool, clear DTC(s).
Turn the ignition off and remove the key from the ignition.
Lock and close all doors to allow the VTSS to go from pre-arm to armed status and wait one minute.
Disarm the VTSS.
Using the scan tool, read DTC(s).
Does the DTC reset?
Yes
>> Check for and correct any CAN B Bus DTC’s set in the ITM or other modules. Also check for intermit-
tent loss Fused B(+) to the ITM.
Perform BODY VERIFICATION TEST – VER 1 (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE)
No
>> DTC is not active at this time. Test complete.
Perform BODY VERIFICATION TEST – VER 1 (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE)
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B1A41-SECURITY TRANSMITTER SENSOR CIRCUIT OPEN
For a complete wiring diagram Refer to Section 8W.
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•
When Monitored:
When the VTSS is armed.
•
Set Condition:
If the voltage current is below a specified range this DTC will set.
Possible Causes
(A645) INTRUSION TRANSMITTER SENSOR SIGNAL CIRCUIT OPEN
(G945) INTRUSION TRANSMITTER SENSOR GROUND CIRCUIT OPEN
INTRUSION SENSOR TRANSMITTER OPEN/MISSING
INTRUSION TRANSCEIVER MODULE
Diagnostic Test
1.
TEST FOR INTERMITTENT CONDITION
Turn the ignition on.
With the scan tool, record and erase DTC’s.
Turn the ignition off and remove the key from the ignition.
Close all doors and arm the VTSS and wait 1 minute.
Disarm the VTSS turn the ignition on and wait 1 minute.
With the scan tool, read DTC’s.
Does the scan tool display B1A41–SECURITY TRANSMITTER SENSOR 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/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)
2.
CHECK THE (A645) INTRUSION TRANSMITTER SENSOR SIGNAL CIRCUIT VOLTAGE
Disconnect the Intrusion Sensor Transmitter connector.
NOTE: Check connectors - Clean/repair as necessary.
Turn the ignition on.
With the scan tool actuate the Intrusion Sensor Transmitter.
Measure the voltage between (A645) Intrusion Sensor Signal circuit and
(G945) Intrusion Transmitter Sensor Ground circuit.
Is the voltage above 10.0 volts
Yes
>> Go To 3
No
>> Go To 4
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3.
CHECK THE INTRUSION SENSOR TRANSMITTER
Turn the ignition is off.
Install a known good Intrusion Sensor Transmitter.
Turn the ignition on.
With the scan tool erase DTC’s.
Turn the ignition off and remove the key from the ignition.
Close all doors and arm the VTSS and wait 1 minute.
Disarm the VTSS turn the ignition on and wait 1 minute.
With the scan tool, read DTC’s.
Does the scan tool display B1A41–SECURITY TRANSMITTER SENSOR CIRCUIT OPEN?
Yes
>> Replace the Intrusion Transceiver Module in accordance with the Service Information.
Perform BODY VERIFICATION TEST – VER 1 (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE)
No
>> Replace the original Intrusion Sensor Transmitter.
Perform BODY VERIFICATION TEST – VER 1 (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE)
4.
CHECK THE (A645) INTRUSION TRANSMITTER SENSOR SIGNAL WIRE
Turn the ignition is off.
Disconnect the Intrusion Transceiver Module connector.
Measure the resistance of the (A645) Intrusion Transmitter Sensor Sig-
nal circuit between the Intrusion Sensor Transmitter connector and the
Intrusion Transceiver Module connector.
Is the resistance below 5.0 ohms?
Yes
>> Repair the (A645) Intrusion Transmitter Sensor Signal circuit
for an open.
Perform BODY VERIFICATION TEST – VER 1 (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL
MODULES
-
STANDARD PROCEDURE)
No
>> Go To 5
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