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Exhaust gas recirculation system: Engine code AEF
Exhaust gas recirculation system: Engine code AEF
Notes:
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◆ The control of the exhaust gas recirculation system is undertaken by the automatic glow period control unit (J179) via EGR valve (N18) to (mechanical) exhaust gas recirculation valve.
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◆ Checking actuation of EGR valve (N18):
=> Repair group 01; Self-diagnosis; Final control diagnosis
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◆ The exhaust gas recirculation is switched off above approx. 1000 m by the altitude correction switch in the automatic glow period control unit.
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◆ The engine speed cut-out is via the automatic glow period control unit (J179). The exhaust gas recirculation is switched on at engine speeds above 825 rpm and is switched off at engine speeds above 3200 rpm.
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◆ During acceleration the exhaust gas recirculation is switched off for 2 seconds.
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◆ Renew self-locking nuts.
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