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Diagnostic Manual, Engines, Volume 2

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 3.2 LH Sequential Multiport Fuel Injectin System (LH-SFI)   >   12 Diagnosis - Complaint Related Diagnostic Chart


Diagnosis - Complaint Related Diagnostic Chart

Complaint/Problem Possible cause Test step/Remedy 1)
Engine starts poorly No TN-signal (rpm signal) 23 13.0
Engine starts poorly and accelerates poorly Left or right hot wire MAF sensor (B2/3 or B2/4) defective
Left or right ECT sensor (B11/9 or B11/10) defective
23 6.0 - 7.0
23 10.0 - 11.0
Engine does not start No voltage supply from base module (N16/1)
FP relay module (K27/1 or K27/2) defective

Left or right ECT sensor (B11/9 or B11/10) defective
Injector control and injection timing
23 1.0 - 5.0
23 9.0
34 2.0

23 10.0 - 11.0
23 32.0
Engine runs uneven at CTP (idle) Left or right EGR valve defective
Injector control and injection timing
23 23.0
23 32.0
Engine has insufficient engine output Left or right camshaft timing adjustment defective 23 27.0 - 28.0
1) Observe Preparation for Test, see 22 .