Check Harness And Connector Certification Ecu Battery And Body Ground

Last Updated on Sun, 05 Aug 2012 | Toyota Avalon Repair

(a) Disconnect the D39 ECU connector.

(b) Measure the voltage between the specified terminals on the wire harness side connector. Voltage

Tester Connection

Specified Condition

D39-1 (+B1) - Body ground

10 to 14 V

(c) Measure the resistance between the specified terminals on the wire harness side connector. Resistance

Tester Connection

Specified Condition

D39-17 (E) - Body ground

Below 1 Q

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK RESISTANCE OF COMMUNICATION LINE

Combination Switch Connector Front View:

- h

1 12 3 516 7

Certification ECU Connector Front View: (D39

/

rvTffVrJ

r

1

2

3

4

5

6

7

8

9

J U

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

7|28 29|30|3l|32

33

34

35

36

37

38

39

40

MPX1 MPX2

Power Source Control ECU Connector Front View:

27 28 29 30 31 32

MPX1

(a) Disconnect the D13, D39 and D44 ECU connectors.

(b) Measure the resistance between the specified terminals on the wire harness side connector.

Resistance

Tester Connection

Specified Condition

D39-27 (MPX1) - D13-7 (MPX2)

Below 1 Q

D39-28 (MPX2) - D44-7 (MPX1)

Below 1 Q

Result

Result

Proceed to

Both are OK

A

One is OK

B

Both are NG

C

REPLACE CERTIFICATION ECU AND REPAIR OR REPLACE HARNESS OR CONNECTOR

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE CERTIFICATION ECU

B1208

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