Inspection Procedure

1. Turn the ignition switch to the ON position.
2. Check the illumination of the MIL.

   Result 

   RESULT REFERENCE
   
   

   Result	Proceed to
   MIL remains illuminated (Even after ignition switch is turned to ON position and several seconds have passed, MIL still remains illuminated)	A
   MIL remains off (Does not illuminate at all)	B
   MIL illuminates for several seconds, but turns off after engine is started	C

B:  Go to step  5

C: SYSTEM OK 

A: Go to next step. 

1. Connect Techstream to the DLC3.
2. Turn the ignition switch to the ON position and turn the tester on.
3. Select the following menu items: Powertrain / Engine and ECT / Trouble Code.
4. Check if any DTCs have been stored. Note down any DTCs.
5. Clear the DTCs (See DTC CHECK / CLEAR ).
6. Check if the MIL goes off.

   Standard: MIL goes off. 

OK: REPAIR CIRCUITS INDICATED BY OUTPUT DTCS 

NG: Go to next step. 

1. Disconnect the E5 ECM connector.
Fig 1: Identifying E5 ECM Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the ignition switch to the ON position.
3. Check that the MIL is not illuminated.

   OK: MIL is not illuminated. 

4. Reconnect the ECM connector.

OK: REPLACE ECM  (See REMOVAL  )

NG: Go to next step. 

1. Disconnect the E5 ECM connector.
2. Disconnect the C10 combination meter connector.
Fig 2: Identifying C10 Combination Meter Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Measure the resistance according to the value (s) in the table below.

   Standard resistance (Check for open) 

   RESISTANCE SPECIFIED CONDITIONS
   
   

   Tester Connection	Specified Condition
   W (E5-30) - C10-8	Bellow 1 Ω

   Standard resistance (Check for short) 

   RESISTANCE SPECIFIED CONDITIONS
   
   

   Tester Connection	Specified Condition
   W (E5-30) or C10-8 - Body ground	10 kΩ or higher

4. Reconnect the ECM connector.
5. Reconnect the combination meter connector.

OK: REPLACE COMBINATION METER ASSEMBLY 

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (COMBINATION METER - ECM) 

1. Turn the ignition switch to the ON position.
2. Start the engine.

   Result 

   RESULT REFERENCE
   
   

   Result	Proceed to
   Engine starts	A
   Engine does not start*	B
   HINT: *: Techstream cannot communicate with the ECM.

B: GO TO VC OUTPUT CIRCUIT 

A: Go to next step. 

1. Disconnect the E5 ECM connector.
Fig 3: Identifying E5 ECM Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the ignition switch to the ON position.
3. Measure the voltage according to the value (s) in the table below.

   Standard voltage 

   VOLTAGE SPECIFICATIONS
   
   

   Tester Connection	Condition	Specified Condition
   W (E5-30) - Body ground	Ignition switch ON	11 to 14 V

4. Reconnect the ECM connector.

OK: REPLACE ECM  (See REMOVAL  )

NG: Go to next step. 

1. Disconnect the E5 ECM connector.
2. Disconnect the C10 combination meter connector.
Fig 4: Identifying C10 Combination Meter Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Measure the resistance according to the value (s) in the table below.

   Standard resistance (Check for short) 

   RESISTANCE SPECIFIED CONDITIONS
   
   

   Tester Connection	Specified Condition
   W (E5-30) - C10-8	Bellow 1 Ω

   Standard resistance (Check for Short) 

   RESISTANCE SPECIFIED CONDITIONS
   
   

   Tester Connection	Specified Condition
   W (E5-30) or C10-8 - Body ground	10 kΩ or higher

4. Reconnect the ECM connector.
5. Reconnect the combination meter connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (COMBINATION METER ECM) 

OK: REPLACE COMBINATION METER ASSEMBLY