Pre-Heating System; Inspection And Repair; Glow Relay; Glow Plug - Isuzu 4JA1 Workshop Manual

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Make the necessary adjustments, repairs, and part replacement if excessive wear of damage is discovered during

PRE-HEATING SYSTEM

VISUAL CHECK

Check the main fuses and glow indicator for damage.

Replace the part(s) if required.

The glow relay is located in the relay box the engine

compartment.

Use an ohmmeter to measure the resistance between

terminals No.2 and No.3.

If the measured value is outside the specified range, the

glow relay must be replaced.

Glow Relay Resistance

Use a circuit tester to test the glow plugs for continuity.

Glow Plug Resistance (Reference)

LNW21KSH001401

EGR SYSTEM 4JA1T (L)

Refer to 6F-9. (EGR system diagram)

ENGINE ELECTRICAL 6D – 33

Approximately 0.9

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