Inspection Procedure

CHECK THAT MIL IS ILLUMINATED

Turn the ignition switch to the ON position.

Check the illumination of the MIL.

Result

DTC RESULT DESCRIPTION

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.

CHECK WHETHER MIL TURNS OFF
1. Connect the intelligent tester to the DLC3.
2. Turn the ignition switch to the ON position and turn the tester on.
3. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
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.
CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT IN WIRE HARNESS)
1. Disconnect the E5 ECM connector.
  
  Fig 1: Disconnecting 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.

CHECK HARNESS AND CONNECTOR (COMBINATION METER - ECM)

Disconnect the E5 ECM connector.
Disconnect the C10 combination meter connector.

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

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

Standard resistance (Check for Open)

STANDARD RESISTANCE SPECIFICATIONS FOR OPEN

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

Standard resistance (Check for Short)

STANDARD RESISTANCE SPECIFICATIONS FOR SHORT

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

Reconnect the ECM connector.
Reconnect the combination meter connector.

OK: REPLACE COMBINATION METER ASSEMBLY

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

CHECK THAT ENGINE STARTS

Turn the ignition switch to the ON position.

Start the engine.

Result

DTC RESULT DESCRIPTION

Result	Proceed to
Engine starts	A
Engine does not start*	B

HINT:

*: The intelligent tester 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 E5 ECM connector.

Fig 3: Disconnecting E5 ECM Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Turn the ignition switch to the ON position.

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

Standard voltage

STANDARD VOLTAGE SPECIFICATIONS

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

Reconnect the ECM connector.

OK: REPLACE ECM (See REMOVAL )

NG: Go to next step.

CHECK HARNESS AND CONNECTOR (COMBINATION METER - ECM)

Disconnect the E5 ECM connector.
Disconnect the C10 combination meter connector.

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

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

Standard resistance (Check for short)

STANDARD RESISTANCE SPECIFICATIONS FOR SHORT

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

Standard resistance (Check for Short)

STANDARD RESISTANCE SPECIFICATIONS FOR SHORT

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

Reconnect the ECM connector.
Reconnect the combination meter connector.

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

OK: REPLACE COMBINATION METER ASSEMBLY