U1170–LOST COMMUNICATION WITH INTRUSION SENSOR 2
For a complete wiring diagram Refer to Section 8W
Possible Causes
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INTERMITTENT CONDITION
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D86 MICROWAVE SELECT JUMPER OPEN
|
(A417) FUSED B+ CIRCUIT OPEN
|
(Z910) GROUND CIRCUIT OPEN
|
(D122) LIN BUS CIRCUIT OPEN
|
FRONT INTRUSION SENSOR
|
INTRUSION TRANSCEIVER MODULE
|
Diagnostic Test
1.
INTERMITTENT DTC
With the scan tool, erase the current Intrusion Transceiver Module DTC's.
Turn the ignition off.
Arm the VTSS and wait 1 minute.
Disarm the VTSS and turn the ignition on.
Using the scan tool, read ITM DTC(s).
Does the scan tool display the same DTC?
Yes
No
2.
(D86) MICROWAVE SELECT JUMPER OPEN
Disconnect the Front Intrusion Sensor connector.
Measure the resistance of the (D86) Microwave Select Jumper at the Front Intrusion Sensor connector.
Is the resistance below 1.0 ohm?
Yes
No
3.
(A417) FUSED B+ OPEN
Using a 12-volt test light connected to ground, check the (A417) Fused B(+) circuit in the Front Intrusion Sensor connector.
Does the test light illuminate brightly?
Yes
No
4.
(Z910) GROUND CIRCUIT OPEN
Using a 12-volt test light connected to 12-volts, check the (Z910) Ground circuit at the Front Intrusion Sensor connector.
Does the test light illuminate brightly?
Yes
No
5.
LIN BUS VOLTAGE
The Front Intrusion Sensor connector is disconnected.
Measure the voltage of the (D122) LIN Bus circuit at the Intrusion Sensor connector with the key on and off.
Observe the voltage displayed on the voltmeter.
Is the voltage between 1 and 12 volts?
Yes
No
6.
(D122) LIN BUS CIRCUIT OPEN
Disconnect the Intrusion Transceiver Module harness connector.
Measure the resistance of the (D122) LIN Bus circuit between the Intrusion Transceiver Module and the Intrusion Sensor connector.
Is the resistance below 3.0 ohms?
Yes
No