NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NVH Troubleshooting Chart
Use chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.

×: Applicable
Wiring diagram
PrecautionHVAC branch line circuit
Diagnosis Procedure
1.CHECK CONNECTOR
Turn the ignition switch OFF.
Disconnect the battery cable from the negative terminal.
Check the terminals and connectors of the A/C auto amp. for
damage, bend and loose connection (unit
side and connector side).
2.CHECK HARNESS FOR OPEN CIRCUI ...
Maintenance under severe operating conditions
Severe driving conditions
The maintenance intervals shown on the preceding pages are for normal
operating conditions. If the vehicle is mainly operated under severe driving
conditions as shown below, more frequent maintenance must be performed on the
following items as shown in the table.
...
P050A, P050e cold start control
Description
ECM controls ignition timing and engine idle speed when engine is started
with pre-warming up condition.
This control promotes the activation of three way catalyst by heating the
catalyst and reduces emissions.
DTC Logic
DTC DETECTION LOGIC
NOTE:
If DTC P050A or P050E is dis ...