The installation process for the 2TR-FE crankshaft position sensor starts with applying engine oil to its O-ring followed by bolt installation while checking for O-ring damage during this step and tightening the bolt to 8.5 Nm torque level (87 kgf-cm, 75 in-lbf). Firmly secure the crankshaft position sensor connector apart from connecting it to the two wire harness clamps. When installing the five bolts on the idle pulley assembly with bracket (w/ air conditioning) maintain uniform tightness while following the specified bolt sequence to apply 21 Nm (214 kgf-cm, 16 ft-lbf) to bol Install the compressor along with its magnetic clutch before adding the fan and generator V belt (both components part of the air conditioning system). Install the engine under cover sub-assembly Number One as part of the 4WD and Pre-Runner models installation. Attach the cable to the negative battery terminal by tightening it to 3.9 Nm (40 kgf-cm, 35 in-lbf).