1991 LEXUS SC400 Service Repair Manual

Page 2097 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 2098 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 2099 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 2100 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 2101 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

Page 2102 of 4087

LEXUS SC400 1991  Service Repair Manual 
INSTALLATION OF HIGH±TENSION
CORDS AND CORD CLAMPS
(See Components on page IG±11)
1.  INSTALL LOWER HIGH±TENSION CORD COVER Install the high±tension cord cover with the bolt.
2.  INSTALL RH HIGH

Page 2103 of 4087

LEXUS SC400 1991  Service Repair Manual 
4.  INSTALL HIGH±TENSION CORDS(a)  Connect  the high±tension cords to the spark plugs anddistributor caps.
(b)  Secure the high±tension cords with the cord clamps as
shown in the illustration.
(b)

Page 2104 of 4087

LEXUS SC400 1991  Service Repair Manual 
wAlign the spline of the ignition coil with the spline of
the holder, and slide on the holder.
NOTICE: Check that holder is correctly installed to the
grommet and ignition coil as shown in the illust