Inspection Procedure

CHECK THAT MIL IS ILLUMINATED

Turn the ignition switch to ON.

Check the illumination of the MIL.

Result

RESULT CHART

Result	Proceed to
MIL remains illuminated (Even after ignition switch is turned to ON and several seconds have passed, MIL still remains illuminated)	A
MIL remains off (Does not illuminate at all)	B

B: Go to step 5

A: Go to next step

CHECK WHETHER MIL TURNS OFF
1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON and turn the Techstream on.
3. Enter the following menus: Powertrain/Engine/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.
  OK:
  
  MIL goes off.
  
  NG: Go to step 3
  
  OK: REPAIR CIRCUITS INDICATED BY OUTPUT DTCS (See DIAGNOSTIC TROUBLE CODE CHART )
CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT IN WIRE HARNESS)
1. Disconnect the ECM connector.
2. Turn the ignition switch to ON.
3. Check that the MIL is not illuminated.
  OK:
  
  MIL is not illuminated.
4. Reconnect the ECM connector.
  NG: Go to step 4
  
  Fig 1: Disconnecting ECM D60 Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  OK: REPLACE ECM (See INSPECTION PROCEDURE )

CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM)

Disconnect the ECM connector.
Disconnect the combination meter assembly connector.

Measure the resistance according to the value (s) in the table below.

Standard Resistance (Check for Short)

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
D60-18 (W) or E1-10 (CHK) - Body ground	Always	10 kΩ or higher

Reconnect the ECM connector.
Reconnect the combination meter assembly connector.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 2: Identifying ECM Connector And Combination Meter Assembly Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE COMBINATION METER ASSEMBLY (See COMBINATION METER )

CHECK THAT ENGINE STARTS

Turn the ignition switch to ON.

Start the engine.

Result

RESULT CHART

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

B: GO TO VC OUTPUT CIRCUIT

A: Go to next step

CHECK HARNESS AND CONNECTOR (COMBINATION METER - BODY GROUND)

Disconnect the ECM connector.
Turn the ignition switch to ON.

Measure the voltage according to the value (s) in the table below.

Standard Voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
D60-18 (W) - Body ground	Ignition switch ON	11 to 14 V

Reconnect the ECM connector.
NG: Go to step 7

Fig 3: Disconnecting ECM D60 Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE ECM (See INSPECTION PROCEDURE )

CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM)

Disconnect the ECM connector.
Disconnect the combination meter assembly connector.

Measure the resistance according to the value (s) in the table below.

Standard Resistance (Check for Open)

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
D60-18 (W) - E1-10 (CHK)	Always	Below 1 Ω

Reconnect the ECM connector.
Reconnect the combination meter assembly connector.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 4: Identifying ECM Connector And Combination Meter Assembly Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE COMBINATION METER ASSEMBLY (See COMBINATION METER )