8474889

1.

Electrical systems consist of a lot of harness and connectors, poor connection of terminals can cause various problems and damge of component.

2.

Perform checking procedure as follows.

(1)

Check damage of harness and terminals : Check terminals for contact resistance, corrosion and deformation.

(2)

Check connecting condition of ECM and component connector : Check terminal seperation, damage of locking device and connecting condition between terminal and wiring.

caution

Disconnect the pin which requires checking at male connector and insert it to the terminal at female connector for checking connecting condition. ( after checking, reconnect the pin at correct position. )

3.

Is the problem found?

YES

a.

Repair the trouble causing part and go to "Verification of Vehicle Repair".

NO

a.

Go to "Ground Circuit Inspection".

1.

IG KEY "OFF", ENGINE "OFF".

2.

Disconnect ECM connector.

3.

Check continuity between ECM connector(C230-K) terminal 81 and chassis ground.

a.

Specification : Continuity (below 1.0Ω )

4.

Is A/T, M/T auto recognition terminal grounded well?

YES

a.

Go to "CAN communication line inspection".

NO

a.

Repair poor connection or open in G15 ground point related circuit and go to "Verification of Vehicle Repair".

5.

Check CAN BUS vertical resistance

(1)

IG KEY "OFF", ENGINE "OFF".

(2)

Measure the resistance between DLC terminal 3 and 11.

(3)

Disconnect ECM connector.

(4)

Measure the resistance between DLC terminal 3 and 11.

a.

Specification : Both ECM and TCM are connected : 60 ± 3Ω

Both ECM and TCM are disconnected : 120 ± 3Ω

(5)

Is measured CAN BUS vertical resistance value within the specification?

YES

a.

Go to "2. Check short to ground in CAN BUS" as follows.

NO

a.

When measured resistances for both cases are below 10Ω : Repair short between one CAN BUS CAN and another one, and go to "Verification of Vehicle Repair".

b.

When measured resistances for both cases are 120Ω : Go to"4. CAN BUS continuity test"

c.

When measured resistances for both cases are infiniteΩ :Repair open in CAN communication circuit between DLC terminal box and I/P junction

6.

Check short to ground in CAN BUS

(1)

IG KEY "OFF", ENGINE "OFF"

(2)

Disconnect ECM connector and TCM connector.

(3)

Check the continuity between DLC terminal 3 and chassis ground. (CAN HIGH)

(4)

Check the continuity between DLC terminal 11 and chassis ground. (CAN LOW)

a.

Specification : Discontinuity (Infinite Ω)

(5)

Is CAN BUS insulated with ground correctly?

YES

a.

Go to "3. Check short to battery in CAN BUS" as follows.

NO

a.

Repair short to ground and go to "Verification of Vehicle Repair".

7.

Check short to battery in CAN BUS

(1)

IG KEY "OFF", ENGINE "OFF"

(2)

Disconnect ECM connector and TCM connector.

(3)

IG KEY "ON"

(4)

Measure the voltage of DLC terminal 3.(CAN HIGH)

(5)

Measure the voltage of DLC terminal 11.(CAN LOW)

a.

Specification : 0.0V~0.1V

(6)

Is abnormal voltage detected with both connectors disconnected?

YES

a.

Repair short to battery and go to "Verification of Vehicle Repair".

NO

a.

Go to "4. CAN BUS continuity test" as follows.

8.

CAN BUS continuity test

(1)

IG KEY "OFF", ENGINE "OFF"

(2)

Disconnect ECM connector and TCM connector.(Disconnect ‘CAN communication’ related connectors.)

(3)

Check continuity between DLC terminal 3 and CAN HIGH terminal or each module.

(CAN HIGH : ECM connector terminal 84, TCM connector terminal 3, ABS connector terminal 3, VDC connector terminal 35, 4WD ECM connector terminal 5, Airbag ECM connector terminal 3)

(4)

Check continuity between DLC terminal 11 and CAN LOW terminal or each module.

(CAN HIGH : ECM connector terminal 83, TCM connector terminal 4, ABS connector terminal 15, VDC connector terminal 14, 4WD ECM connector terminal 4, Airbag ECM connector terminal 4)

a.

Specification : Continuity( below 1.0Ω )

(5)

Is continuity of CAN BUS line confirmed?

YES

a.

Go to "Component Inspection".

NO

a.

Repair open in CAN communication line and go to "verification of Vehicle Repair".