WIRING DIAGRAM Engine Control Module No.1 Knock Sensor (Front side) 1 W 50 E9 KNK1 E1 No.2 Knock Sensor (Rear side) 1 W 49 E9 KNK2 E1 FI6541 INSPECTION PROCEDURE HINT: If diagnostic trouble code 52 is displayed, check No.1 knock sensor (for front side) circuit. If diagnostic trouble code 55 is displayed, check No.2 knock sensor (for rear side) circuit. If diagnostic trouble code 53 is displayed, replace engine control module. 1 Check continuity between terminals KNK1, KNK2 of engine control module connector and body ground. LOCK SST B 50, 49 KNK1 KNK2 BE6653 FI6506 P (1) Connect SST (check harness "A"). (See page EG-404) SST 09990-01000 (2) Disconnect the engine control module con- nectors. C Measure resistance between terminals KNK1, KNK2 of engine control module connector and body ground. OK Resistance: 1 MΩ or higher NG OK Go to step 3 .