Dodge Nitro. Manual - part 795

 

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Dodge Nitro. Manual - part 795

 

 

Fig. 28: Key Cylinder & Punch 
Courtesy of CHRYSLER LLC 

Rotate key to RUN position.  

Press in on retaining pin while pulling key cylinder (1) from ignition switch. See Fig. 28.  

INSTALLATION 

LOCK CYLINDER HOUSING 

1 - KEY CYLINDER
2 - PUNCH

 

2007 Dodge Nitro R/T 

2007 ENGINE Ignition Control - Service Information - Nitro

  

Fig. 29: Key, Key Cylinder & Retaining Pin Holes 
Courtesy of CHRYSLER LLC 

The ignition key (1) must be in the key cylinder (2) for cylinder installation. 

1. Install the key cylinder into the housing using care to align the end of the key cylinder (2) with the 

ignition switch.  

2. Push the key cylinder (2) in until it clicks.  

3. Replace the upper and lower shrouds.  

4. Reconnect the battery.  

PLUG-GLOW 2.8L DIESEL 

DESCRIPTION 

GLOW PLUG 

1 - KEY
2 - KEY CYLINDER
3 - RETAINING PIN HOLE

 

2007 Dodge Nitro R/T 

2007 ENGINE Ignition Control - Service Information - Nitro

  

Fig. 30: Glow Plug 
Courtesy of CHRYSLER LLC 

Glow plugs are used to help start a cold or cool engine. The glow plugs will heat up and glow to heat the 
combustion chamber of each cylinder. An individual glow plug is used for each cylinder. 

OPERATION 

GLOW PLUG 

CAUTION: The glow plugs operate on a 4.4-volt system. The glow plugs DO NOT 

tolerate any over voltage. Full battery voltage will destroy the glow plug 
immediately. DO NOT test the glow plugs with a 12V source as damage will 
occur to the glow plug.

CAUTION:

Never bend, bump or knock the fast metallic glow plugs.  

Fast metallic glow plugs must not be handled loose in a container. 
Store, handle, and transport them only in original boxes.  

If there is any doubt about the proper condition of a glow plug, do not 
reuse it.  

Do not clean the glow plugs with abrasive or aggressive media.  

Avoid dipping the glow plug into fluids.  

Read Diagnostic Trouble Codes (DTCs). If a glow plug problem is 
indicated, do not start the engine.  

CAUTION: Disregarding these instructions may cause severe engine damage.

 

2007 Dodge Nitro R/T 

2007 ENGINE Ignition Control - Service Information - Nitro

  

Fig. 31: Glow Plug 
Courtesy of CHRYSLER LLC 

The Engine Control Module (ECM) monitors various engine sensors. When the ignition key is turned to the ON 
position, the ECM sends a signal to the glow plug module (relay) to turn on, and cycle, the glow plugs for a pre-
determined amount of time, plus illuminate the glow plug light in the instrument panel. Once activated, the 
element inside of the core of the glow plug begins to glow. Each glow plug draws approximately 8 amps, for a 
total system amperage of 32 amps at 22°C (72°F) ambient temperature. If there is a fault with the glow plug 
system, the ECM will store a fault code. 

DIAGNOSIS AND TESTING 

GLOW PLUG SYSTEM 

1. Measure the electrical resistance of each glow plug while it is still installed in the cylinder head. 

Resistance should be less than 0.8 ohm between the electrical connector point on the glow plug and the 
cylinder head. The ground contact on the DVOM must be as close as possible to the point where the glow 
plug contacts the cylinder head to avoid erratic resistance measurements.  

2. If the resistance is out of tolerance, remove the glow plug from the cylinder head and check the resistance 

again.  

3. Use the actuator test function of the scan tool to test the glow plug module and glow plug lamp. The glow 

plug module's on-board diagnostic tests will automatically check the electrical condition of the entire 
glow plug system.  

4. After the scan tool glow plug actuator test function is complete, if MIL is OFF and no glow plug DTCs 

are present, testing is complete and the engine can be started. 

CAUTION: The glow plugs operate on a 4.4-volt system. DO NOT test the glow plugs 

with a 12 V source as damage will occur to the glow plug(s).

CAUTION: DO NOT attempt to start the engine until the glow plug system tests 

correctly.

 

2007 Dodge Nitro R/T 

2007 ENGINE Ignition Control - Service Information - Nitro

  

 

 

 

 

 

 

 

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