| Components |

| 1. Timing chain cover 2. Gasket |
Replacement 1. Remove the crankshaft damper pulley. (Refer to Timing System - "Crankshaft Damper Pulley") 2. Remove the front oil seal (A). 3.
Removal 1. Remove the LH/RH cylinder head cover. (Refer to Cylinder Head Assembly - "Cylinder Head Cover") 2. Remove the lower oil pan. (Refer to Lubrication System - "Oil Pan") 3.
Inspection 1. Ignition "ON" 2. Using the scan tool. 3. Emit intensive light toward photo sensor using a lamp, and check the output voltage change. 4. The voltage will rise with higher intensive light and reduce with lower intensive light.
Replacement 1. Disconnect the negative (-) battery terminal. 2. Remove the heater and blower unit.(Refer to HA group – heater unit). 3. Remove the blower unit (A) from the heater unit after loosening a mounting bolt and 3 screws. Make sure that there is no air leaking out of the blower and duct joints.