Troubleshooting
| Note check that the transmission is in neutral and the engine stop switch is in the “run” position. Grasp the clutch lever. Check that the fuse is not blown and the battery is fully-charged before diagnosing. |

Specifications
Service data
Fi sensors
Tightening torque specifications
Reference: for the tightening torque of fastener not specified in this
section, refer to “tightening torque list” in section 0c . ...
DTC “c28” (p1655): secondary throttle
valve actuator (stva) malfunction
Detected condition and possible cause
Detected condition
Possible cause
The operation voltage does not reach the stva.
Ecm does not receive communication signal from the
stva. Stva can not operate properly or its motor locked
Stva malfunction.
...
Thermostat inspection
Inspect the thermostat in the following procedures:
remove the thermostat. Refer to “thermostat removal and installation” .
Inspect the thermostat pellet for signs of cracking.
Test the thermostat at the bench for control action.
Caution
do not contact ...