Resonance intake manifold switchover valve

1986-1995 : 200TD, 200CE, E200, 260E, 300E 2.6, 300E 2.8, 300E, E320, 400E, E420, 500E, E500, 300CE, E320, 230TE, 300TE, 300D 2.5 TURBO, E300 DIESEL, 300TD, 300E 4MATIC, 300TE 4MATIC, E36 AMG
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nitchioo
Posts: 3
Joined: Thu 05 Jul, 2018 11:53 am
Model you own: I own multiple different models
Region: Australian outlaying islands-Territories
Location: MOWBRAY

Resonance intake manifold switchover valve

Post by nitchioo » Mon 16 Jul, 2018 3:21 pm

Hi all,

I have a M104 engine with the HFM-SFI system. My analog code reader is persistently retrieving this code 46 from Pin 8.
The analog code explanation is: Resonance intake manifold switchover valve - open/short to ground or B+

Part of the 'MB Diagnostic Manual for Engines 09/00' gives 3 possible digital codes:

105 - Resonance intake manifold switchover valve (Y22/6) short circuit to plus
106 - Resonance intake manifold switchover valve (Y22/6) open/short circuit to ground
107 - Control of ignition coil preloading voltage exceeds limits (starting 06/93)

Since my VIN plate states built April '93, I have ruled out digital code 107 (correct assumption?).

The 'MB Diagnostic Manual for Engines 09/00' lists a Test step/Remedy : 23 => 33.0 for digital codes 105 & 106.
I don't have the rest of this diagnostic manual. If someone has the manual, would you mind sharing the Test step/remedy information please.

This is the last code to remove in a long saga. I will elaborate if I can't get this information.

regards,

Ben
210065 E320 5sp. Auto Sedan (green-black) Avant-garde
124088 300TE_2.8 4sp. Auto Estate (blue-black) Classic
124023 230E 4sp. Auto Sedan (silver-gold) Classic

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