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Total OBD & ECU Auto Diagnostics

Total OBD & ECU Auto Diagnostics

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Wire Harness Side:

D-CAN J/C Connector

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

(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-B (A/B) - D15-16 (BAT)

Ignition switch OFF

1 Q or higher

OK

D41-1S (A/B) -D15-16 (BAT)

Ignition switch OFF

1 Q or higher

OK

D41-B (A/B) - D15-16 (BAT)

Ignition switch OFF

Below 1 Q

NG

D41-1S (A/B) -D15-16 (BAT)

Ignition switch OFF

Below 1 Q

NG

REPLACE CENTER AIRBAG SENSOR ASSEMLBY

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 +B (P-CAN J/C - POWER STEERING ECU)

Wire Harness Side:

P-CAN J/C Connector

DLC3:

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) -D15-16 (BAT)

Ignition switch OFF

1 Q or higher

OK

D42-15 (EPS) -D15-16 (BAT)

Ignition switch OFF

1 Q or higher

OK

D42-4 (EPS) -D15-16 (BAT)

Ignition switch OFF

Below 1 Q

NG

D42-15 (EPS) -D15-16 (BAT)

Ignition switch OFF

Below 1 Q

Go to step 1e

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

Wire Harness Side:

P-CAN J/C Connector

IST' "TOT

DLC3:

Dlc Toyota Yaris
J/B

(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) - D15-16 (BAT)

Ignition switch OFF

1 Q or higher

OK

D42-16 (J/B) -D15-16 (BAT)

Ignition switch OFF

1 Q or higher

OK

D42-5 (J/B) - D15-16 (BAT)

Ignition switch OFF

Below 1 Q

NG

D42-16 (J/B) -D15-16 (BAT)

Ignition switch OFF

Below 1 Q

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

Wire Harness Side:

P-CAN J/C Connector

DLC3:

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

-MET

(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) -D15-16 (BAT)

Ignition switch OFF

1 Q or higher

OK

D42-18 (MET) -D15-16 (BAT)

Ignition switch OFF

1 Q or higher

OK

D42-7 (MET) -D15-16 (BAT)

Ignition switch OFF

Below 1 Q

NG

D42-18 (MET) -D15-16 (BAT)

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 +B (POWER STEERING ECU MAIN WIRE)

Wire Harness Side:

Power Steering ECU Connector flnil nrm

Wire Harness Side:

P-CAN J/C Connector

-EPS

DLC3:

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) -D15-16 (BAT)

Ignition switch OFF

1 Q or higher

OK

D42-15 (EPS) -D15-16 (BAT)

Ignition switch OFF

1 Q or higher

OK

D42-4 (EPS) -D15-16 (BAT)

Ignition switch OFF

Below 1 Q

NG

D42-15 (EPS) -D15-16 (BAT)

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 +B (MAIN BODY ECU BRANCH WIRE)

Wire Harness Side:

Main Body ECU Connector

C131840E02

Wire Harness Side:

P-CAN J/C Connector isr "TST

DLC3:

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) - D15-16 (BAT)

Ignition switch OFF

1 Q or higher

OK

D42-16 (J/B) -D15-16 (BAT)

Ignition switch OFF

1 Q or higher

OK

D42-5 (J/B) - D15-16 (BAT)

Ignition switch OFF

Below 1 Q

NG

D42-16 (J/B) -D15-16 (BAT)

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 +B (COMBINATION METER ECU BRANCH WIRE)

Wire Harness Side:

Combination Meter ECU Connector

ciffi^ibl

Front View

(a) Disconnect the D1 combination meter ECU connector.

C139156E04

Wire Harness Side:

P-CAN J/C Connector

Tar' "nsT

DLC3:

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

-MET

(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) -D15-16 (BAT)

Ignition switch OFF

1 Q or higher

OK

D42-18 (MET) -D15-16 (BAT)

Ignition switch OFF

1 Q or higher

OK

D42-7 (MET) -D15-16 (BAT)

Ignition switch OFF

Below 1 Q

NG

D42-18 (MET) -D15-16 (BAT)

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 (P-CAN J/C - COMBINATION METER ECU (CAN-H, CAN-L))

Short to GND in CAN Bus Line

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