Intake manifold / electric drive module

This article is based on SI 0093 Pierburg:

Vehicle: Product: Intake manifold Electric drive module
Opel Astra H, Vectra C, Signum with 1.9 l
CDTi engine (Z19DTH)
Zafira B, Alfa Romeo: 147, 156, 159, GT (1.9 JTD)
Fiat: Stilo (1.9 JTD)
PIERBURG No. 7.00373.12.0 7.00521.14.0
Replacement for: 7.00373.10.0 / 7.01860.00.0 7.00521.00.0 / .11.0
O.E. No.*: 58 50 119 / 93179055 8 50 440 / 93183260

* The reference numbers given are for comparison purposes only and must not be used on invoices to the consumer.

Possible customer complaints:

The vehicles listed above are provided with two separate inlet ports for each cylinder. In each case one of the two channels can be sealed off by means of a tumble flap. The tumble flaps are linked by means of a lever arrangement and are actuated by an electric drive module. In the case of the customer complaints mentioned, the error memory is read out in the course of the workshop check and the electric drive module is frequently replaced as being defective.

Often the error is not with the drive module!

The true fault cause are often worn out, tight tumble flaps in the intake manifold. The drive module can no longer move the tight tumble flaps and indicates an error. 

Note: Electric drive modules are capable of “learning”: After having operated the ignition several times, the electric drive modules are “set up” irreversibly matching the intake manifold to which they are fitted. For this reason when exchanging the intake manifold, also the electric drive module must be replaced by a new one. The “old” drive module can no longer be used. 

Pic 1: Engine compartment of the Opel Vectra: The intake manifold with the EGR flap is emphasised in red. The drive module is located, not being visible, “behind the engine” and is only hinted (green dashed line).

Engine compartment of the Opel Vectra

Operation of the Tumble Flaps 

So that the fuel/air mixture is combusted in the CDti engine as quickly as possible and as best as possible, the air entering through two separate intake channels for each cylinder is provided with a swirl. one of these intake channels in each case is equipped in addition with an adjustable tumble fl ap which is actuated through a lever arrangement by the electric drive module. through the position of the tumble fl aps, swirling of the fresh air in the cylinder can be adapted to the specifi c load conditions of the engine. In this way the quantity of emitted pollutants and the power can be optimally set up depending on the specifi c load conditions. 

Pic. 2: Operating principle of the tumble fl ap - Left: Low speed: Tumble fl ap closed, strong swirl; Right: High-speed Tumble fl ap open, high volume fl ow 
Operating principle of the tumble fl ap

Electric Drive Module EAM-i 

EaM-i stands for Elektrisches AntriebsModul (electric drive module) with integrated “intelligence”. It permits an adjustment to any point within the operating angle range. an integrated angle sensor acquires the actual position. In case a deviation with respect to the setpoint position is detected, this is then indicated as an error to the engine controller. the position of the tumble fl aps in the intake manifold itself is not acquired. this can only be performed indirectly through the angle position of the drive module. for this reason malfunctions at the tumble fl aps or at the lever the arrangement are sometimes attributed to the drive module. 

Pic. 3: Intake manifold 7.00373.12.0 with drive module 7.00521.14.0

Intake manifold 7.00373.12.0 with drive module 7.00521.14.0

Pic. 4: Electric drive module EAM-i
electric drive module EAM-i

Diagnosis information

The cause for these malfunctions are often stiff or sticking tumble fl aps. Deposits or sticking tumble fl aps can be caused by very oily intake or charging air. there are many reasons for this:

Pic. 5: Lever arrangement at the intake manifold in the Opel Vectra (top emphasised in red and detailed view)
 Lever arrangement at the intake manifold in the Opel Vectra

When the faulty intake manifold remains in the vehicle and only the drive module is changed, this error will reappear quite quickly:

Note: In the case of constantly open tumble flaps, the soot levels in the exhaust gas increase at low engine speeds. In the case of constantly closed tumble flaps, the soot levels increase at high engine speeds. 

Pic. 6: Worn out bearings at the tumble flaps
Worn out bearings at the tumble flaps

 

 



7.00373.12.0 Intake Manifold Module PIERBURG
7.00373.12.0, Intake Manifold Module, Intake manifold, PIERBURG, Opel Vectra Astra, Fiat Croma Stilo, Saab 9-3 Z19DTH Z19DTJ 937A4.000 2005+, 55190238, 55206459, 55210201, 5850119, 5850158, 5850180, 931179055, 93179055, 700373120 7.00373.12.0 - Intake Manifold Module PIERBURG, Opel Vectra Astra, Fiat Croma Stilo, Saab 9-3 Z19DTH Z19DTJ 937A4.000 2005+
  • Operating Mode:  Mechanical
10 293,47 Kč/pcs incl. VAT (8 507,00 Kč/pcs excl. VAT)
8 749,45 Kč/pcs incl. VAT (7 230,95 Kč/pcs excl. VAT)
Availability:
Stock: > 25 pcs

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7.00521.14.0 Control, swirl covers (induction pipe) PIERBURG
7.00521.14.0, Control, swirl covers (induction pipe), Throttle body, PIERBURG, 55193942, 55199908, 55199915, 55205127, 55206457, 5850574, 850440, 850444, 93183260, 93185801, 700521140 7.00521.14.0 - Control, swirl covers (induction pipe) PIERBURG
  • Operating Mode:  Electric
  • Voltage [V]:  12 V
7 326,55 Kč/pcs incl. VAT (6 055,00 Kč/pcs excl. VAT)
6 227,57 Kč/pcs incl. VAT (5 146,75 Kč/pcs excl. VAT)
Availability:
Stock: 1 pcs

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