The Timing Reference Sensor (TRS) is an electronic component that is mounted to the left side of the gear case, near the crankshaft centerline. See Figure 20274 .
TRS and Related Parts
Note: The length of the TRS sensor element is 56.08-56.57 mm (2.207-2.227 in.).
The sensor portion of the TRS extends through an opening in the gear case, and is positioned near the teeth of the timing wheel. A bolt, inserted through a hole in the TRS bracket, secures the TRS assembly to the gear case. The TRS connector is gray in color.
The TRS sends a signal to the ECM. This signal is generated by a series of evenly spaced teeth on the timing wheel. As the timing wheel rotates with the crankshaft, a tooth passes by the TRS as each cylinder reaches 10 before Top-Dead-Center. These signals are used by the ECM to determine injector solenoid operation times.
The TRS is a non-serviceable component and is replaced as a unit. No adjustment is required.
Remove the TRS as follows:
Install the TRS as follows:
Note: The TRS is an electronic component. Use care upon installation.