Wiring/Cable Design
Different types of wire/cable shielding methods are utilized in the vehicle. Common types of circuit shielding include twisted-pair and internal braid or foil. Twisted pair is typically used in circuits such as high speed GMLAN communication circuits. The wire pair is twisted together at a particular turns-per-length ratio. Shielded cable is utilized for all other circuits requiring either protection from external EMI or to reduce EMI radiation of the cable itself into other nearby components or circuits.
Low and Intermediate Voltage Wiring
The signal circuits for the transmission sensors utilize shielding protection. The drive motor generator position sensor and temperature sensor circuits utilize internal foil shielding. The wiring harness external of the transmission assembly is connected to chassis ground with ring terminals at the drive motor control module assembly. The internal transmission wiring harness is attached to chassis ground with a ring terminal at the valve body assembly.
The auxiliary transmission fluid pump (ATFP) 3 phase cables utilize internal foil shielding. The wiring harness shield is connected to chassis ground within the ATFP control module.
The power steering intermediate voltage wiring utilizes internal foil shielding. The wiring harness shield is connected to chassis ground at the APM connector and within the power steering motor assembly.