2135711

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 "Power Circuit Inspection".

1.

IG KEY "OFF", ENGINE "OFF".

2.

Disconnect O2 sensor connector.

3.

IG KEY "ON".

4.

Measure the voltage of O2 sensor connector terminal 2.

a.

Specification : 11.0V~13.0V ( Main relay ON power )

5.

Is the measured voltage within the specification?

YES

a.

Go to "Control Circuit Inspection".

NO

a.

Repair open in Main relay power circuit and E/R FUSE & RELAY BOX 10A SNSR fuse and go to "Verification of Vehicle Repair".

1.

Check O2 sensor heater control circuit voltage

(1)

IG KEY "OFF", ENGINE "OFF".

(2)

Disconnect O2 sensor connector.

(3)

IG KEY "ON".

(4)

Measure the voltage of O2 sensor connector terminal 5.

a.

Specification : 2.0V~2.5V

(5)

Is the measured voltage within the specification?

YES

a.

Go to "Component Inspection".

NO

a.

No voltage is detected : Go to "2. Check open in O2 sensor heater control circuit" as follows.

b.

High voltage is detected : Repair short to battery in control circuit and go to "Verification of Vehicle Repair".

2.

Check open in O2 sensor heater control circuit

(1)

IG KEY "OFF", ENGINE "OFF".

(2)

Disconnect O2 sensor connector and ECM connector.

(3)

Check continuity between O2 sensor connector terminal 5 and ECM connector terminal 51.

a.

Specification : Continuity (below 1.0Ω )

(4)

Is the measured resistance within the specification?

YES

a.

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

NO

a.

Repair open in O2 sensor heater control circuit and go to "Verification of Vehicle Repair".