Section 26 (Diagnostics): Precaution: Measurement
WARNING: This page is about a different car, the 2001 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
When measuring voltage and resistance of the ECM, TCM or each sensor, use a tapered pin with a diameter of less than 0.64 mm (0.025 in) in order to avoid poor contact. Do not insert the pin more than 5 mm (0.20 in).