Inspection Procedure

HINT:

Read freeze frame data using the hand-test or the OBD II scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, etc at the time of the malfunction occurred.

1. Are there any other codes (besides DTC P0101) being output. 

   PREPARATION: 

   1. Connect the hand-held tester or the OBD II scan tool to the DTC3.
   2. Turn the ignition switch ON and push the hand-held tester or the OBD II scan tool main switch ON.
   3. When using hand-held tester, Enter the following menus: DIAGNOSIS / ENHANCED OBD II/DTC INFO/CURRENT CODES.

   CHECK: 

   Read the DTCs.

   RESULT: 

   Fig 1: Display (DTC Output) Chart

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

   If any other codes besides P0101 are output, perform the troubleshooting for those DTCs first.

   1. A: Replace mass air flow meter. 
   2. B: Go to relevant DTC chart (See  DIAGNOSTIC TROUBLE CODE CHART   ).