GLOW PLUG RELAY INSPECTION [WL-3]

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Note

•  Perform the following test only when directed.

System Inspection

1.  Carry out the “Glow Plug Control Operation Inspection“. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [WL-3].)

2.  If not as specified, perform the further inspection for the glow plug relay.

Continuity Inspection

1.  Remove the glow plug relay. (See GLOW PLUG RELAY REMOVAL/INSTALLATION [WL-3].)

2.  Verify the continuity between the glow plug relay terminals.

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•  If not as indicated in the table, replace the glow plug relay. (See GLOW PLUG REMOVAL/INSTALLATION [WL-3].)

•  If as specified but the “System Inspection” is failed, perform the “Circuit Open/Short Inspection”.

Circuit Open/Short Inspection

1.  Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION [WL-3].)

2.  Inspect the following wiring harnesses for an open or short circuit. (Continuity inspection)

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Open circuit

•  If there is no continuity in the following wiring harnesses, there is an open circuit. Repair or replace the wiring harness.

―  Glow plug relay terminal A and PCM terminal 4V

―  Glow plug relay terminal B and body ground

―  Glow plug relay terminal C and power supply

―  Glow plug relay terminal D and glow plug cord

Short circuit

•  If there is continuity in the following wiring harnesses, there is a short circuit. Repair or replace the wiring harness.

―  Glow plug relay terminal A and power supply

―  Glow plug relay terminal A and body ground

―  Glow plug relay terminal C and body ground