Jeep Wrangler Quiz
STARTING AND OPERATING

NORMAL OPERATION — DIESEL ENGINE

In this manual: STARTING AND OPERATING
INTRODUCTION — 5KNOW YOUR VEHICLE — 177GETTING TO KNOW THE INSTRUMENT PANEL — 77STARTING AND OPERATING — 126MULTIMEDIA — 106SAFETY — 89IN CASE OF EMERGENCY — 24SERVICE AND MAINTENANCE — 105SPECIFICATIONS — 16CUSTOMER ASSISTANCE — 7
~1min read

Note the following when the diesel engine is operating:

  • All message center indicators are off.
  • The Malfunction Indicator Light (MIL) is not illuminated.
  • The engine oil pressure warning light is not illuminated.
  • Voltmeter operation.

The voltmeter may show fluctuation at various engine temperatures. This is caused by the glow plug heating system. The number of cycles and the duration of the cyclic operation are controlled by the Powertrain Control Module. The glow plug heater indicator may remain illuminated for several minutes. After the heater operation is complete, the voltmeter needle will stabilize.

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A quick Jeep Wrangler quiz: every answer comes with an explanation and a link to the manual page.