No communication between the ACC control module and the ISAT.
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No communication between the ACC control module and the ISAT.
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1.
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Check whether communication can be established between the main instrument display panel and the SID. If not, proceed to point 3.
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2.
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Connect a BOB to the ACC control module and check the voltage across BUS+ (pin 11) and ground. Also check the voltage across BUS- (pin 13) and ground. In both cases a reading of about 2.5 V should be obtained. If not, proceed to point 4.
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3.
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Check the data link connector for loose or displaced pins. Check the voltage across BUS+ (pin 1) and ground and across BUS- (pin 9) and ground. In both cases a reading of about 2.5 V should be obtained. If not, check the wiring for continuity and shorting. Locate and rectify the break or short circuit.
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4.
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Check the ACC control module and the wiring harness side for pin slide-out. Proceed to section
for further measures if the ACC panel does not go out when the Black Panel button is pressed.
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