Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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 |
NO RELATED
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.