Retrieving Diagnostic Trouble Codes: Notes

NOTE: Diagnostic Trouble Codes (DTCs) may be retrieved using Toyota scan tester or Malfunction Indicator Light (MIL) located on left side of instrument cluster.

NORMAL mode is used to retrieve DTCs from Engine Control Module (ECM). TEST mode is used to check for DTCs when operating vehicle to simulate conditions in which DTC was set. TEST mode contains a higher sensing ability to detect malfunctions. TEST mode helps determine malfunctions caused by poor electrical connections, which are difficult to determine using NORMAL mode. TEST mode also checks for malfunction in starter signal circuit, A/C switch signal and park/neutral position switch signal.

NOTE: If using Toyota scan tester, when ignition switch is turned from ON to ACC or OFF position or scan tester is switched from NORMAL mode to TEST mode, all DTCs will be erased. DO NOT switch modes until all DTCs are recorded.