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.

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".

Power Supply Circuit Inspection
1.

Check power circuit voltage

(1)

IG KEY "OFF", ENGINE "OFF".

(2)

Disconnector MAFS connector and APS connector.

(3)

IG KEY "ON".

(4)

Measure the voltage between MAFS connector terminal 4 or APS connector terminal 5 and chassis ground.

a.

Secification : 4.8V~5.1V

(5)

Is the measured voltage within the specification?

YES

a.

Go to "Component Inspection".

NO

a.

Go to "2. Check open in power circuit" as follows.

2.

Check open in power circuit

(1)

IG KEY "OFF", ENGINE "OFF".

(2)

Disconnector MAFS connector, APS connector and ECM connector.

(3)

Measure the registance between MAFS connector terminal 4 and ECM connector(C213-1) terminal 37.

Measure the registance between APS connector terminal 5 and ECM connector(C213-2) terminal 45.

a.

Secification : Continuity (below 1.0Ω)

(4)

Is the measured resistance within the specification?

YES

a.

Go to "3. Check short to battery in power circuit" as follows.

NO

a.

Repair open in power circuit and go to "Verification of Vehicle Repair".

3.

Check short to battery in power circuit

(1)

IG KEY "OFF", ENGINE "OFF"

(2)

Disconnector MAFS connector, APS connector and ECM connector.

(3)

IG KEY "ON"

(4)

Measure the voltage between MAFS connector terminal 4 or APS connector terminal 5 and chassis ground.

a.

Specification : 0.0V~0.1V

(5)

Is the measured voltage within the specification?

YES

a.

If the circuit is insulated well and the sensor power supply from ECM is high, replace ECM and go to "Verification of Vehicle Repair".

NO

a.

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

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