Lexus SC300 / Lexus SC400. Manual - part 527

SERVICE SPECIFICATIONS

SERVICE DATA

Ignition

T/M in N range

10

°

 BTDC @ idle

timing

[Check connector terminals TE1 and E1 con-
nect]

Spark plug

Type

ND

PK16R11

NGK

BKR5EP11

GAP

STD

1.1 mm

0.043 in.

Limit

1.3 mm

0.051 in.

High–tension

Resistance

Limit

25 k

Ω

 per cord

cord

Ignition coil

Primary coil resistance

0.2–0.3 

Secondary coil resistance

6–11 k 

Distributor

Air gaps

0.2–0.4 mm

0.008–0.016 in.

Pickup coil resistance (cold)

G1–G (–)

125–190 

Ω

G2–G (–)

125–190 

Ω

NE–G (–)

155–240 

Ω

–

IGNITION SYSTEM

Service Specifications

IG–15

IGNITION COILS

COMPONENTS FOR REMOVAL AND
INSTALLATION

IG–20

–

 IGNITION SYSTEM

Ignition Coils

REMOVAL OF RH IGNITION COIL

(See Components on page 

IG–20

)

1. 

REMOVE RH ENGINE WIRE COVER
(See steps 1, 3 and 4 on pages 

IG–11

 and 12)

2. 

DISCONNECT HIGH–TENSION CORD
(See step 9 on pages 

IG–13

 and 14)

3. 

DISCONNECT IGNITION COIL CONNECTOR

4. 

REMOVE IGNITION COIL
(a) Remove 

the three bolts, and disconnect the ignition coil.

(b)  Disconnect the cam position sensor connector, and

remove the ignition coil.

REMOVAL OF LH IGNITION COIL

(See Components on page 

IG–20

)

1. 

DISCONNECT CABLE FROM NEGATIVE TERMINAL OF
BATTERY
CAUTION: Work must be started after approx. 20 se-
conds or longer from the time the ignition switch is
turned to the ”LOCK” position and the negative (–) termi-
nal cable is disconnected from the battery.

2. 

DISCONNECT IGNITION COIL CONNECTOR

3. 

DISCONNECT HIGH–TENSION CORD
(See step 9 on pages 

IG–13

 and 14)

4. 

DISCONNECT NOISE FILTER FROM IGNITION COIL
Remove the bolt, and disconnect the noise filter.

5. 

REMOVE IGNITION COIL
Remove the two bolts and ignition coil.

–

 IGNITION SYSTEM

Ignition Coils

IG–21

INSTALLATION OF RH IGNITION COIL

(See Components on page 

IG–20

)

1. 

INSTALL IGNITION COIL
(a)  Install the ignition coil with the three bolts.

(b)  Install the cam position sensor connector to the ignition

coil bracket.

2. 

CONNECT IGNITION COIL CONNECTOR

3. 

CONNECT HIGH–TENSION CORD
(See step 4 on pages 

IG–16

 and 17)

4. 

INSTALL RH ENGINE WIRE COVER
(See steps 8, 10, 12 and 13 on pages 

IG–11

 and 12)

INSTALLATION OF LH IGNITION COIL

(See Components on page 

IG–20

)

1. 

INSTALL IGNITION COIL
Install the ignition coil with the two bolts.

2. 

INSTALL NOISE FILTER TO IGNITION COIL
Install the noise filter with the bolt.

3. 

CONNECT HIGH–TENSION CORD
(See step 4 on pages 

IG–16

 and 17)

4. 

CONNECT IGNITION COIL CONNECTOR

5.  CONNECT CABLE TO NEGATIVE TERMINAL OF

BATTERY

IG–22

–

 IGNITION SYSTEM

Ignition Coils