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Home >> Mercedes Benz >> 1999 >> CLK320 2D Convertible >> Repair and Diagnosis >> Engine Performance >> Tune-Up >> Mixture Formation -- 208 Chassis >> General Information >> General notes - AH07.00-P-3004 >> Notes on ignition circuit shutoff test - AH07.00-P-3004-03WA

Notes on ignition circuit shutoff test - AH07.00-P-3004-03WA

Engine 113 

IMPORTANT The ignition circuit shutoff can only be carried out on engine 113. Switch off ignition circuit for not more than 20 seconds in order to pinpoint a fault. If an ignition circuit is switched off for more than 20 seconds, faults are stored in the fault memory (e.g. misfiring damaging TWC, O2 sensor upstream TWC). In this case, erase the fault memory.

Good image ignition circuit shutoff 

Fig 1: Identifying Good Image Ignition Circuit Shutoff
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Fault image ignition circuit shutoff 

Fig 2: Identifying Fault Image Ignition Circuit Shutoff
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