Description
caution

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

When fuel filter is not heated although fuel filter heater circuit is normal, Inspect the fuel filter.

Diagnostic Procedure
Fuel filter heater resistance inspection
1.

IG KEY "OFF", ENGINE "OFF"

2.

Disconnect fuel filter heater connector (C227).

3.

Before measuring resistance, you must calibrate(0Ω) the tester.

caution

"Multitester Calibration" of "Details Inspection(Equipment Setting)" reference

4.

Measure the resistance between fuel filter heater terminal "1" and "2".

- The resistance value is very small, Inspect foreign substances on the fuel filter heater meticulously.

A.

Specification : 0.5 Ω ± 10% ( 20℃ )

B.

Case 1 : In case that resistance is high. (Open or over resistance)

Heating coil in the fuel filter heater open and Replace the fuel filter heater.

Engine hard starting occurs or engine starting is impossible at cold starting (below -5℃) because battery power is not supplied to fuel filter heater coil.

C.

Case 2 : In case that resistance is low. (Short)

Heating coil in the fuel filter heater short (short to ground) and fusible link is blown because of over current.

Replace the fuel filter heater.

Яндекс.Метрика