Terminal and Connector Inspection
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.

note

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 "Signal Circuit Inspection".

Signal Circuit Inspection
1.

Check CAN BUS resistance

(1)

IG KEY "OFF", ENGINE "OFF"

(2)

Measure the resistance between DLC terminal 3 and terminal 11. (TEST 1)

(3)

Disconnect ECM and ABS(ESP) connector.

(4)

Measure the resistance between DLC terminal 3 and terminal 11. (TEST 2)

1)

Specification :

Both ECM connected : 60 ± 3Ω (Test 1)

Both ECM disconnected : 120 ± 3Ω (Test 2)

(5)

Is CAN BUS resistance within the specification?

YES

a.

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

NO

a.

Below 10Ω for both conditions(disconnected, connected) : Repair short between CAN BUS and go to "Verification of Vehicle Repair".

b.

120Ω for both conditions(disconnected, connected) : Go to "4. Check CAN BUS continuity" as follows.

c.

Infinite Ω for both conditions(disconnected, connected) :Repair open in CAN communication circuit between DLC terminal and I/P junction box.

2.

Check short to ground in CAN BUS

(1)

IG KEY "OFF", ENGINE "OFF"

(2)

Disconnect ECM and ABS(ESP) connector.

(3)

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

(4)

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

1)

Specification : Discontinuity ( Infinite Ω )

(5)

Is measured resistance within the specification?

YES

a.

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

NO

a.

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

3.

Check short to battery in CAN BUS

(1)

IG KEY "OFF", ENGINE "OFF".

(2)

Disconnect ECM and ABS(ESP) 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)

1)

Specification : 0.0V~0.1V

(6)

Is measured voltage within the specification with both connector disconnected?

YES

a.

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

NO

a.

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

4.

Check CAN BUS continuity

(1)

IG KEY "OFF", ENGINE "OFF".

(2)

Disconnect ECM and ABS(ESP) connector.

(3)

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

( CAN HIGH : ECM connector terminal 84, TCM connector terminal 3, ABS connector terminal 11( ESP connector terminal 7) )

(4)

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

( CAN LOW : ECM connector terminal 83, TCM connector terminal 36, ABS connector terminal 10( ESP connector terminal 22) )

1)

Specification : Continuity(below 1.0Ω )

(5)

Is the measured resistance within the specification?

YES

a.

Go to "Component Inspection".

NO

a.

Repair open in CAN BUS and go to "Verification of Vehicle Repair".

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