Inspection Procedure

HINT:

• The following troubleshooting flowchart is based on the premise that the engine is cranked normally. If the engine will not crank, proceed to the problem symptoms table (See PROBLEM SYMPTOMS TABLE ).
• Read freeze frame data using an intelligent tester or OBD II scan tool. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air/fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

When using intelligent tester: 

1. READ VALUE OF INTELLIGENT TESTER (STARTER SIGNAL) 
   1. Connect an intelligent tester to the DLC3.
   2. Turn the ignition switch to ON and turn the tester ON.
   3. On the tester, select the following menu items: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / STARTER SIG.
   4. Check the value displayed on the tester when the ignition switch is turned to the ON and START positions.

   OK 

   IGNITION SWITCH POSITIONS
   
   

   Ignition Switch Positions	ON	START
   STARTER SIG	OFF	ON

   OK: REPLACE ECM 

   NG: Go to next step 

2. INSPECT PARK / NEUTRAL POSITION SWITCH OR CLUTCH START SWITCH 
   1. Inspect the Park / Neutral Position (PNP) switch. (For A/T models)
      1. Disconnect the A2 PNP switch connector.
      2. Check the resistance when the transmission gear selector lever is moved to each position.

         Standard resistance 

         TESTER CONNECTION SPECIFIED CONDITION
         
         

         Gear Selector Lever Positions	Tester Connections	Specified Conditions
         P	2 - 6,4 - 5	Below 1 Ω
         R	1 -2	Below 1 Ω
         N	2 - 9,4 - 5	Below 1 Ω
         D	2 - 7	Below 1 Ω
         2	2 - 3	Below 1 Ω
         L	2 - 8	Below 1 Ω

      3. Reconnect the PNP switch connector.
         Fig 1: Identifying PNP Switch Connector Terminals

         Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
   2. Inspect the clutch start switch. (For M/T models)
      Fig 2: Inspecting Clutch Start Switch (M/T Models)

      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
      1. Disconnect the C8 clutch start switch connector.
      2. Check the resistance when the clutch start switch is ON and OFF.

         Standard resistance 

         TESTER CONNECTION SPECIFIED CONDITION
         
         

         Ignition Switch Positions	Tester Connections	Specified Conditions
         ON (pushed)	1 - 2	Below 1 Ω
         OFF (free)	1 - 2	10 kΩ or higher

      3. Reconnect the clutch start switch connector.

   NG: REPLACE PARK / NEUTRAL POSITION SWITCH OR CLUTCH START SWITCH  (GO TO STEP  3 AFTER REPLACEMENT)

   OK: Go to next step 

3. READ VALUE OF INTELLIGENT TESTER (STARTER SIGNAL) 
   1. Connect the intelligent tester to the DLC3.
   2. Turn the ignition switch to ON and turn the tester ON.
   3. On the tester, select the following menu items: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / STARTER SIG.
   4. Check the value displayed on the tester when the ignition switch is turned to the ON and START positions.

   OK 

   IGNITION SWITCH POSITIONS
   
   

   Ignition Switch Positions	ON	START
   STARTER SIG	OFF	ON

   OK: SYSTEM IS OK 

   NG: Go to next step 

4. INSPECT IGNITION OR STARTER SWITCH ASSEMBLY 
   1. Disconnect the 110 ignition switch connector.
   2. Check the resistance.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION
      
      

      Ignition Switch Positions	Tester Connections	Specified Conditions
      LOCK	All Terminals	10 kΩ or higher
      ACC	1-3	Below 1 Ω
      ON	1-2,1-3,2-3,5-6	Below 1 Ω
      START	1-2,4-5,4-6,5-6	Below 1 Ω

   3. Reconnect the ignition switch connector.
      Fig 3: Identifying Ignition Switch Connector Terminals

      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

   NG: REPLACE IGNITION OR STARTER SWITCH ASSEMBLY  (GO TO STEP  5 AFTER REPLACEMENT)

   OK: Go to next step 

5. READ VALUE OF INTELLIGENT TESTER (STARTER SIGNAL) 
   1. Connect the intelligent tester to the DLC3.
   2. Turn the ignition switch to ON and turn the tester ON.
   3. On the tester, select the following menu items: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / STARTER SIG.
   4. Check the value displayed on the tester when the ignition switch is turned to the ON and START positions.

   OK 

   IGNITION SWITCH POSITIONS
   
   

   Ignition Switch Positions	ON	START
   STARTER SIG	OFF	ON

   OK: SYSTEM IS OK 

   NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

When Using OBD II Scan Tool: 

1. INSPECT ECM (STA VOLTAGE) 
   1. Turn the ignition switch to ON.
   2. Measure the voltage between the terminals of the E3 ECM connector.
      Fig 4: Identifying E3 ECM Connector Terminals

      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION
      
      

      Tester Connections	Specified Conditions
      STA (E3-17) - E1 (E3-5)	0 V

   3. Measure the voltage between the terminals of the E3 ECM connector when the engine is cranked.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connections	Specified Conditions
   STA (E3-17) - E1 (E3-5)	5.5 V or more

   NG: REPLACE ECM 

   OK: Go to next step 

2. INSPECT PARK / NEUTRAL POSITION SWITCH OR CLUTCH START SWITCH 
   1. Inspect the Park / Neutral Position (PNP) switch. (For A/T models)
      1. Disconnect the A2 PNP switch connector.
      2. Check the resistance when the transmission gear selector lever is moved to each position.

         Standard resistance 

         TESTER CONNECTION SPECIFIED CONDITION
         
         

         Gear Selector Lever Positions	Tester Connections	Specified Conditions
         P	2 - 6,4 - 5	Below 1 Ω
         R	1 - 2	Below 1 Ω
         N	2 - 9, 4 - 5	Below 1 Ω
         D	2 - 7	Below 1 Ω
         2	2 - 3	Below 1 Ω
         L	2 - 8	Below 1 Ω

         Fig 5: Identifying PNP Switch Connector Terminals

         Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
      3. Reconnect the PNP switch connector.
   2. Inspect the clutch start switch. (For M/T models)
      Fig 6: Inspecting Clutch Start Switch (M/T Models)

      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
      1. Disconnect the C8 clutch start switch connector.
      2. Check the resistance when the clutch start switch is ON and OFF.

         Standard resistance 

         TESTER CONNECTION SPECIFIED CONDITION
         
         

         Ignition Switch Positions	Tester Connections	Specified Conditions
         ON (pushed)	1 - 2	Below 1 Ω
         OFF (free)	1 - 2	10 kΩ or higher

      3. Reconnect the clutch start switch connector.

   NG: REPLACE PARK / NEUTRAL POSITION SWITCH OR CLUTCH START SWITCH  (GO TO STEP  3 AFTER REPLACEMENT)

   OK: Go to next step 

3. INSPECT ECM (STA VOLTAGE) 
   1. Turn the ignition switch to ON.
   2. Measure the voltage between the terminals of the E3 ECM connector.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION
      
      

      Tester Connections	Specified Conditions
      STA (E3-17) - E1 (E3-5)	0 V

   3. Measure the voltage between the terminals of the E3 ECM connector when the engine is cranked.
      Fig 7: Identifying E3 ECM Connector Terminals

      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connections	Specified Conditions
   STA (E3-17) - E1 (E3-5)	5.5 V or more

   OK: SYSTEM IS OK 

   NG: Go to next step 

4. INSPECT IGNITION OR STARTER SWITCH ASSEMBLY 
   1. Disconnect the 110 ignition switch connector.
      Fig 8: Identifying Ignition Switch Connector Terminals

      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
   2. Check the resistance.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION
      
      

      Ignition Switch Positions	Tester Connections	Specified Conditions
      LOCK	All Terminals	10 kΩ or higher
      ACC	1-3	Below 1 Ω
      ON	1-2,1-3,2-3,5-6	Below 1 Ω
      START	1-2, 4-5, 4-6, 5-6	Below 1 Ω

   3. Reconnect the ignition switch connector.

   NG: REPLACE IGNITION OR STARTER SWITCH ASSEMBLY  (GO TO STEP  5 AFTER REPLACEMENT)

   OK: Go to next step 

5. INSPECT ECM (STA VOLTAGE) 
   Fig 9: Inspecting ECM (STA Voltage)

   Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
   1. Turn the ignition switch to ON.
   2. Measure the voltage between the terminals of the E3 ECM connector.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION
      
      

      Tester Connections	Specified Conditions
      STA (E3-17) - E1 (E3-5)	0 V

   3. Measure the voltage between the terminals of the E3 ECM connector when the engine is cranked.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connections	Specified Conditions
   STA (E3-17) - E1 (E3-5)	5.5 V or more

   OK: SYSTEM IS OK 

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR