Use Diagnostic Trouble Codes (DTCs) (from the DTC checks) in the table below to determine the trouble area and proper inspection procedure. The Supplemental Restraint System (SRS) diagnostic trouble code chart is shown below as an example.

Symptom simulation
Problem symptoms tableKnock sensor (3MZ-FE)
REPLACEMENT
1. DISCHARGE FUEL SYSTEM PRESSURE (See page 11-35 )
2. DRAIN ENGINE COOLANT (See page 16-26 )
3. REMOVE V-BANK COVER SUB-ASSY (See page 14-149 )
4. REMOVE AIR CLEANER CAP SUB-ASSY (See page 14-149 )
5. REMOVE EMISSION CONTROL VALVE SET (See page 14-149 )
6. REMOVE INTAKE AIR SURGE ...