Ca

Wire Harness Side:

Center Airbag Sensor Assembly Connector

(a) Disconnect the D16 center airbag sensor assembly connector.

Wire Harness Side:

D-CAN J/C Connector

Ignition Yaris

(b) Measure the resistance. HINT:

The resistance must be measured after the D41 D-CAN J/C connector is disconnected.

Result

Tester Connection

Condition

Specified Condition

Proceed to

D41-8 (A/B) - D15-4 (CG)

Ignition switch OFF

1 Q or higher

OK

D41-19 (A/B) -D15-4 (CG)

Ignition switch OFF

1 Q or higher

OK

D41-8 (A/B) - D15-4 (CG)

Ignition switch OFF

Below 1 Q

NG

D41-19 (A/B) -D15-4 (CG)

Ignition switch OFF

Below 1 Q

REPLACE CENTER AIRBAG SENSOR ASSEMBLY

REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO CENTER AIRBAG SENSOR ASSEMBLY (D-CAN J/C - CENTER AIRBAG SENSOR ASSEMBLY (CAN-H, CAN-L))

CHECK CAN BUS LINE FOR SHORT TO GND (P-CAN J/C - POWER STEERING ECU)

Wire Harness Side:

P-CAN J/C Connector

DLC3:

CG

1

2

3

4

5

6

7

8

g

10

11

12

13

14

15

(a) Measure the resistance. HINT:

The resistance must be measured after the D42 P-CAN J/C connector is disconnected.

Result

Tester Connection

Condition

Specified Condition

Proceed to

D42-4 (EPS) -D15-4 (CG)

Ignition switch OFF

1 Q or higher

OK

D42-15 (EPS) -D15-4 (CG)

Ignition switch OFF

1 Q or higher

OK

D42-4 (EPS) -D15-4 (CG)

Ignition switch OFF

Below 1 Q

NG

D42-15 (EPS) -D15-4 (CG)

Ignition switch OFF

Below 1 Q

CHECK CAN BUS LINE FOR SHORT TO GND (P-CAN J/C - MAIN BODY ECU)

Wire Harness Side:

P-CAN J/C Connector

1st' "tot

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

(a) Measure the resistance. HINT:

The resistance must be measured after the D42 P-CAN J/C connector is disconnected.

Result

Tester Connection

Condition

Specified Condition

Proceed to

D42-5 (J/B) - D15-4 (CG)

Ignition switch OFF

1 Q or higher

OK

D41-16 (J/B) -D15-4 (CG)

Ignition switch OFF

1 Q or higher

OK

D42-5 (J/B) - D15-4 (CG)

Ignition switch OFF

Below 1 Q

NG

D41-16 (J/B) -D15-4 (CG)

Ignition switch OFF

Below 1 Q

CHECK CAN BUS LINE FOR SHORT TO GND (P-CAN J/C - COMBINATION METER ECU)

Wire Harness Side:

P-CAN J/C Connector isr' "nor xc

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

(a) Measure the resistance. HINT:

The resistance must be measured after the D42 P-CAN J/C connector is disconnected.

Result

Tester Connection

Condition

Specified Condition

Proceed to

D42-7 (MET) -D15-4 (CG)

Ignition switch OFF

1 Q or higher

OK

D41-18 (MET) -D15-4 (CG)

Ignition switch OFF

1 Q or higher

OK

D42-7 (MET) -D15-4 (CG)

Ignition switch OFF

Below 1 Q

NG

D41-18 (MET) -D15-4 (CG)

Ignition switch OFF

Below 1 Q

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (D-CAN J/C - P-CAN J/C (CAN-H, CAN-L))

CHECK CAN BUS LINE FOR SHORT TO GND (POWER STEERING ECU MAIN WIRE)

Wire Harness Side:

Power Steering ECU Connector

nnr

nr

/ ,

na j yJiiJ

Wire Harness Side:

P-CAN J/C Connector nor" "non

DLC3:

CG-

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

(a) Disconnect the D31 power steering ECU connector.

(b) Measure the resistance. HINT:

The resistance must be measured after the D42 P-CAN J/C connector is disconnected.

Result

Tester Connection

Condition

Specified Condition

Proceed to

D42-4 (EPS) -D15-4 (CG)

Ignition switch OFF

1 Q or higher

OK

D42-15 (EPS) -D15-4 (CG)

Ignition switch OFF

1 Q or higher

OK

D42-4 (EPS) -D15-4 (CG)

Ignition switch OFF

Below 1 Q

NG

D42-15 (EPS) -D15-4 (CG)

Ignition switch OFF

Below 1 Q

NG

REPLACE POWER STEERING ECU

REPLACE POWER STEERING ECU

REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO POWER STEERING ECU (P-CAN J/C POWER STEERING ECU (CAN-H, CAN-L))

CHECK CAN BUS LINE FOR SHORT TO GND (MAIN BODY ECU BRANCH WIRE)

Wire Harness Side:

Main Body ECU Connector

C131840E02

Wire Harness Side:

P-CAN J/C Connector

Tar' "ToT

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

(a) Disconnect the D33 main body ECU connector.

(b) Measure the resistance. HINT:

The resistance must be measured after the D42 P-CAN J/C connector is disconnected.

Result

Tester Connection

Condition

Specified Condition

Proceed to

D42-5 (J/B) - D15-4 (CG)

Ignition switch OFF

1 Q or higher

OK

D41-16 (J/B) -D15-4 (CG)

Ignition switch OFF

1 Q or higher

OK

D42-5 (J/B) - D15-4 (CG)

Ignition switch OFF

Below 1 Q

NG

D41-16 (J/B) -D15-4 (CG)

Ignition switch OFF

Below 1 Q

NG

REPLACE MAIN BODY ECU

REPLACE MAIN BODY ECU

REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO MAIN BODY ECU (P-CAN J/C MAIN BODY ECU (CAN-H, CAN-L))

CHECK CAN BUS LINE FOR SHORT TO GND (COMBINATION METER ECU BRANCH WIRE)

Wire Harness Side:

Combination Meter ECU Connector

1011 12

IT=C

Front View

C139156E04

Wire Harness Side:

P-CAN J/C Connector

Tw wr

1

2

3

4

5

6

7

8

g

10

11

12

13

14

15

(a) Disconnect the D1 combination meter ECU connector.

(b) Measure the resistance. HINT:

The resistance must be measured after the D42 P-CAN J/C connector is disconnected.

Result

Tester Connection

Condition

Specified Condition

Proceed to

D42-7 (MET) -D15-4 (CG)

Ignition switch OFF

1 Q or higher

OK

D41-18 (MET) -D15-4 (CG)

Ignition switch OFF

1 Q or higher

OK

D42-7 (MET) -D15-4 (CG)

Ignition switch OFF

Below 1 Q

NG

D41-18 (MET) -D15-4 (CG)

Ignition switch OFF

Below 1 Q

NG

REPLACE COMBINATION METER ECU

REPLACE COMBINATION METER ECU

REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO COMBINATION METER ECU (P-CAN J/C - COMBINATION METER ECU (CAN-H, CAN-L))

Open in One Side of CAN Branch Line

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

Don't pay hundreds of dollars to find out what is wrong with your car. This book is dedicated to helping the do it yourself home and independent technician understand and use OBD-II technology to diagnose and repair their own vehicles.

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