1991 LEXUS SC400 Service Repair Manual

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Page 2529 of 4087

LEXUS SC400 1991 Service Repair Manual INSPECTION OF HIGH±TENSION CORDS 1. REMOVE HIGH±TENSION CORDS(See steps 1 to 9 on pages IG±11 to 14) 2. INSPECT HIGH±TENSION CORD RESISTANCE Using an ohmmeter, measure the resistance. Maximum

Page 2530 of 4087

LEXUS SC400 1991 Service Repair Manual 4. VISUALLY INSPECT SPARK PLUGSCheck the spark plug for thread damage and insulator dam- age. If abnormal, replace the spark plug. Recommended spark plug: ND PK20R11 NGK BKR6EP11 5. INSPECT ELECT

Page 2531 of 4087

LEXUS SC400 1991 Service Repair Manual INSPECTION OF IGNITION COIL 1. (RH IGNITION COIL)REMOVE IGNITION COIL (See page IG±21) 2. (LH IGNITION COIL) DISCONNECT IGNITION COIL CONNECTOR AND HIGH± TENSION CORD FROM IGNITION COIL 3. INSPE

Page 2532 of 4087

LEXUS SC400 1991 Service Repair Manual INSPECTION OF CAM POSITION SENSORS 1. DISCONNECT CAM POSITION SENSOR CONNECTORS(a) (RH Cam Position Sensor)Disconnect the cam position sensor connector from the ignition coil bracket. (See steps 5

Page 2533 of 4087

LEXUS SC400 1991 Service Repair Manual HIGH±TENSION CORDS AND CORD CLAMPS COMPONENTS FOR REMOVAL AND INSTALLATION REMOVAL OF HIGH±TENSION CORDS 1. DISCONNECT CABLE FROM NEGATIVE TERMINAL OFBATTERY CAUTION: Work must be started after ap

Page 2534 of 4087

LEXUS SC400 1991 Service Repair Manual 2. REMOVE INTAKE AIR CONNECTOR(a) Disconnect the following hoses:(1) Air hose from ISC valve (2) Air hose (from PS air control valve) from intake air connector (b) Remove the bolt holding the in

Page 2535 of 4087

LEXUS SC400 1991 Service Repair Manual 6. REMOVE VSV FOR EVAP SYSTEMRemove the two bolts, and disconnect the VSV from cylinder head and timing belt cover. 7. REMOVE RH NO.3 TIMING BELT COVER Remove the three bolts and timing belt cover.

Page 2536 of 4087

LEXUS SC400 1991 Service Repair Manual (b) Disconnect the high±tension cords from the ignitioncoils. w Using a screwdriver, lift up the lock claw and disconnect the holder from the ignition coil. w Disconnect the high±tension cord a
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