Automatic Glow Time Control Module -J179- AND GLOW PLUG, CHECKING: Notes

Observe all safety precautions: SAFETY PRECAUTIONS 

View clean working conditions: CLEAN WORKING CONDITIONS 

Use only gold-plated terminals when servicing any component with gold-plated electrical harness connector terminals.

For wiring diagrams, component locations, and connector views, Refer to the applicable wiring diagram.

Special tools and workshop equipment required 

• Multimeter
• Wiring diagram

Test requirements 

• A/C switched off
• All electrical consumers switched off
• Battery voltage at least 12.5 volts
• Engine control module fuses OK
• Ground connections between engine / transmission / chassis OK
• Ignition switched off
• Vehicles with automatic transmission, shift selector lever in park or neutral

Test procedure 

-- Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK 

Start diagnosis 

Make sure the engine is at room temperature or Colder.

-- Disconnect the Automatic Glow Time Control Module -J179- connector. Refer to applicable wiring diagram for relay location and number.

Checking voltage 

-- Switch the ignition On.

-- Using a Multimeter measure the voltages of the Automatic Glow Time Control Module -J179- connector.

Automatic Glow Time Control Module -J179- electrical harness connector terminal	Measure to:
6	Engine Ground
7	Battery Voltage
11	Engine Ground

Specified value: Battery Voltage

-- Switch the ignition Off.

Continue test according to the following table: 

Value	Cause	Test
If the specified value was not obtained:	Open or shorted circuit	Checking wiring
If the specified value was obtained:	Check reference signal circuit	Checking Activation