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DIAGNOSIS Required Special Tools: ⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly) ⦆ MB991824: V.C.I. ⦆ MB991827: USB Cable ⦆ MB991910: Main Harness A STEP 1. Check harness connector B-20 at the knock sensor Q:Is the harness connector in good condition? YES: Go to Step 2. NO: Repair or replace it. Refer to GROUP 00E, Harness Connector Inspection P.00E-2. Then go to Step 4. STEP 2. Check for harness damage between knock sensor ZK604049 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 1 2 AA00 B-20 harness connector: B-10 harness connector: (1) Disconnect the connector B-20 and B-10 measure at the (2) Measure the resistance between connector B-20 and a . Knock sensor 1 connector B-20 (terminal No. 1) and ECM b Knock sensor 1 connector B-20 (terminal No. 2) and ECM ⦆ Should be less than 2 ohms. Q:Is the measured resistance less than 2 ohms? YES: Then go to Step 3. NO: Repair it. Then go to Step 4. MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS> 13Ab-431 DIAGNOSTIC TROUBLE CODE PROCEDURES |