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  .
• 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.

      Result 

      RESULT REFERENCE
      
      

      Ignition Switch Position	ON	START
      STARTER SIG	OFF	ON

   OK: REPLACE ECM 

   NG: GO TO NEXT STEP 

2. INSPECT CLUTCH START SWITCH 
   1. Inspect the clutch start switch.
      1. Disconnect the C10 clutch start switch connector.
      2. Measure the clutch start switch resistance.

         Standard resistance 

         RESISTANCE SPECIFIED CONDITIONS
         
         

         Switch Positions	Tester Connections	Specified Conditions
         ON	1 - 2	Below 1
         OFF	1 - 2	10 k or higher

      3. Reconnect the clutch start switch connector.

   NG: REPLACE CLUTCH START SWITCH (GO TO NEXT STEP 3 AFTER REPLACEMENT) 

   Fig 1: Inspecting Clutch Start Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   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.

      Result 

      RESULT REFERENCE
      
      

      Ignition Switch Position	ON	START
      STARTER SIG	OFF	ON

   OK: SYSTEM IS OK 

   NG: GO TO NEXT STEP 

4. INSPECT IGNITION SWITCH ASSEMBLY 
   1. Disconnect the I11 ignition switch connector.
   2. Measure the resistance.

      Standard resistance 

      RESISTANCE SPECIFIED CONDITIONS
      
      

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

   3. Reconnect the ignition switch connector.

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

   Fig 2: Identifying I11 Ignition Switch Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   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.

      Result 

      RESULT REFERENCE
      
      

      Ignition Switch Position	ON	START
      STARTER SIG	OFF	ON

   OK: SYSTEM IS OK 

   NG: REPAIR OR REPLACE HARNESS OR 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.

      Standard voltage 

      VOLTAGE SPECIFIED CONDITIONS (1 OF 2)
      
      

      Tester Connections	Specified Conditions
      STA (E3-12) - E1 (E3-5)	0 V

   3. Measure the voltage between the terminals of the E3 ECM connector while the engine is cranking.

      Standard voltage 

      VOLTAGE SPECIFIED CONDITIONS (2 OF 2)
      
      

      Tester Connections	Specified Conditions
      STA (E3-12) - E1 (E3-5)	5.5 V or more

      Fig 3: Identifying Terminals Of E3 ECM Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: REPLACE ECM 

   NG: GO TO NEXT STEP 

2. INSPECT CLUTCH START SWITCH 
   1. Inspect the clutch start switch.
      1. Disconnect the C10 clutch start switch connector.
      2. Measure the resistance between the terminals when the switch is ON and OFF.

         Standard resistance 

         RESISTANCE SPECIFIED CONDITIONS
         
         

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

      3. Reconnect the clutch start switch connector.

   NG: REPLACE CLUTCH START SWITCH (GO TO NEXT STEP 3 AFTER REPLACEMENT) 

   Fig 4: Inspecting Clutch Start Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   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 

      VOLTAGE SPECIFIED CONDITIONS
      
      

      Tester Connections	Specified Conditions
      STA (E3-12) - E1 (E3-5)	0 V

   3. Measure the voltage between the terminals of the E3 ECM connector when the engine is cranked.
      Fig 5: Identifying Terminals Of E3 ECM Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage 

      VOLTAGE SPECIFIED CONDITIONS
      
      

      Tester Connections	Specified Conditions
      STA (E3-12) - E1 (E3-5)	5.5 V or more

   OK: SYSTEM IS OK 

   NG: GO TO NEXT STEP 

4. INSPECT IGNITION SWITCH ASSEMBLY 
   1. Disconnect the I11 ignition switch connector.
   2. Measure the resistance.

      Standard resistance 

      RESISTANCE SPECIFIED CONDITIONS
      
      

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

   3. Reconnect the ignition switch connector.
      Fig 6: Identifying I11 Ignition Switch Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   OK: GO TO NEXT STEP 

5. 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 

      VOLTAGE SPECIFIED CONDITIONS (1 OF 2)
      
      

      Tester Connections	Specified Conditions
      STA (E3-12) - E1 (E3-5)	0 V

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

      Standard voltage 

      VOLTAGE SPECIFIED CONDITIONS (2 OF 2)
      
      

      Tester Connections	Specified Conditions
      STA (E3-12) - E1 (E3-5)	5.5 V or more

      Fig 7: Identifying E3 ECM Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: SYSTEM IS OK 

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR