Examination
1. Clamp the clamp meter, if any, over the individual wires going to the glow plugs, set the ignition to warm up (engine cold) and measure the current consumption. Wire placement: cylinder 1 = black/blue; cylinder 2 = black-violet; cylinder 3 = black-red; cylinder 4 = black/yellow; cylinder 5 = black-green.
2. 2.0 liter engine: after approx. 8 seconds, the current consumption of each glow plug should be approx. 14-16 A.
3. 2.2/2.5 l engine: after approx. 10-20 seconds, the current consumption of each glow plug should be approx. 8-15 A for a short time.
4. If the measured value exceeds the upper specified value, replace the corresponding glow plug.
5. If the measured value is lower than the glow plug's lower set point, check for an open circuit in the power line.
6. If there is no current clamp, set the ignition to warm (engine cold) and connect a test light between the glow plug terminal and the engine block. The control lamp should flash, otherwise check the current lead to the glow plug for a break and replace it accordingly.
7. Switch off the ignition.
8. Check glow plugs for electrical current. To do this, remove the plug for spark plugs G1–G4 (G5) on the heating control relay.
9. Measure with an ohmmeter one by one the resistance between the chips on the plug and the case (engine block). If resistance tends to infinity (oo), then a break in the glow plug or in the power line.
Attention! The heating control relay has built-in electronic protection against short circuits. In the event of a short circuit in glow plugs or electrical wires, the current circuit is interrupted. The relay can function again when the short circuit is removed or the ignition key is turned back to the "0".
Engine 2.0L
Removing
1. Remove the intake manifold.
2. Unscrew the nut for the electrical line.
Attention! On some models, the nut is inserted as an integral part of the cable lug of the line.
3. Unscrew the glow plug with a flexible socket wrench SW 12.
Engine 2.2 / 2.5 l
Removing
1. Remove the plug (arrow) with glow plug.
2. Unscrew the glow plug (R9) socket wrench SW 12.
Glow plugs with burnt pins
Burnt-out glow plug pins are often the result of injector failures that are not caused by flaws in or on the glow plugs.
If such glow plugs are found, it is not enough to replace them. It is also necessary to check the injectors for the formation of a jet of injected fuel, vibration, pressure and tightness (job for auto repair shop).
Installation
1. Screw in the glow plugs with a torque of 20 Nm.
2. Screw on the electrical line together with the nut with a torque of 4 Nm, therefore manually, respectively, with the plug.
3. 2.0L engine: Remove the intake manifold.
4. 2.2/2.5L engine: Remove the air cleaner cross tube.