− INTRODUCTION HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS IN−31 6. CIRCUIT INSPECTION How to read and use each page is shown below. The major role and operation, etc. of the circuit CIRCUIT DESCRIPTION Knock sensor is fitted to the cylinder block to detect engine knocking. This sensor contains a piezoelectric element which generates a voltage when it becomes deformed, which occurs when the cylinder block vibrates due to knocking. If engine knocking occurs, ignition timing is retarded to suppress it. WIRING DIAGRAM Knock Sensor 1 GR V08423 31 Author : Date: Diagnostic Trouble Code No. and Detection Item DTC P0325 Knock Sensor 1 Circuit Malfunction DTC No.
DTC Detecting Condition Trouble Area P0325 No knock sensor 1 signal to ECM with engine speed 1,200 rpm or more. Open or short in kno , Knock sensor 1 (loo ECM ck sensor1 circuit seness) If the ECM detects the above diagnosis conditions, it operates the fall safe function in which t value is set to the maximum value. Indicates the diagnostic trouble code, diagnostic trouble code set parameter and suspect area of the problem. ECM 12 KNK E6 E1 Wiring Diagram This shows a wiring diagram of the circuit. Use this diagram together with ELECTRICAL WIRING DIAGRAM to thoroughly understand the circuit. Wire colors are indicated by an alphabetical code.
B = Black, L = Blue, R = Red, BR = Brown, LG = Light Green, V = Violet, G = Green, O = Orange, W = White, GR = Gray, P = Pink, Y = Yellow, SB = Sky Blue The first letter indicates the basic wire color and the second letter indicates the color of the stripe.