Inspect the camshaft sprocket in the following procedures:
If they are worn or damaged, replace the sprocket/ camshaft assembly and cam chain as a set.

Camshaft inspection
Cam chain tension adjuster inspectionSpecifications
Service data
Drive train
unit: mm (in) except ratio
Tightening torque specifications
Note
the specified tightening torque is described in the following.
“Drive chain related components”
Reference: for the tightening torque of fastener not specified in this
section ...
Tp reset
When replacing the throttle body assembly or tp sensor
with a new one or reinstalling the tp sensor, reset the
tp learned value in the following procedures:
Note
keep the throttle valves fully closed while
resetting the tp learned value.
Turn the ignition switch on.
...
Diagnostic information and procedures
Starting system symptom diagnosis
Condition
Possible cause
Correction / reference item
Engine does not turn
though the starter motor
runs
Faulty starter clutch.
Replace.
Starter button is not
effective
Run down battery
Repair or replac ...