Lexus LS400 (2000 year). Service manual - part 68

BE–100

–

BODY ELECTRICAL

COMBINATION METER

1963

F6 (–) – G16 (+)

F6 (–) – G17 (+)

A/T shift indicator light (L)

Continuity

F7 (–) – G16 (+)

F7 (–) – G17 (+)

A/T shift indicator light (3)

Continuity

F8 (–) – G16 (+)

F8 (–) – G17 (+)

A/T shift indicator light (4)

Continuity

F9 (–) – G16 (+)

F9 (–) – G17 (+)

A/T shift indicator light (D)

Continuity

F10 (–) – G16 (+)

F10 (–) – G17 (+)

A/T shift indicator light (N)

Continuity

F11 (–) – G16 (+)

F11 (–) – G17 (+)

A/T shift indicator light (R)

Continuity

F12 (–) – G16 (+)

F12 (–) – G17 (+)

A/T shift indicator light (P)

Continuity

F15 (+) – F16 (–)

Hi–beam indicator light

Continuity

F17 (+) – F18 (–)

Right turn signal indicator light

Continuity

F19 (+) – F18 (–)

Left turn signal indicator light

Continuity

F20 (+) – F14 (+)

Front fog light indicator light

Continuity

G5 (–) – G16 (+)

G5 (–) – G17 (+)

CRUISE MAIN indicator light

Continuity

G6 (–) – G16 (+)

G6 (–) – G17 (+)

Discharge warning light

Continuity

G7 (–) – G16 (+)

G7 (–) – G17 (+)

Seat belt warning light

Continuity

G8 (–) – G16 (+)

G8 (–) – G17 (+)

Fuel level warning light

Continuity

G9 (–) – G11 (+)

Open door warning light

Continuity

G14 (+) – G13 (–)

SRS warning light

Continuity

G15 (–) – G16 (+)

G15 (–) – G17 (+)

Brake warning light

Continuity

If circuit is not as specified, replace the bulb or circuit plate.

I03500

Wire Harness Side

Connector ”F”

Connector ”E”

Connector ”G”

–

BODY ELECTRICAL

COMBINATION METER

BE–101

1964

3.

INSPECT COMBINATION METER CIRCUIT PLATE
From combination meter ECU to gauges:

(a)

Remove the cover.

(b)

Disconnect connector ”E”, ”F” and ”G” from the combina-
tion meter and inspect the connectors on the wire harness
side as follows.

Terminal

Resistance (

Ω

)

E2 – E3

Approx. 151.8

E4 – E5

Approx. 164.2

E17 – E20

Approx. 151.8

E18 – E19

Approx. 164.2

F1 – F2

Approx. 151.8

F3 – F4

Approx. 164.2

G1 – G2

Approx. 151.8

G3 – G4

Approx. 164.2

If circuit is not as specified, inspect gauge*

1

 or meter*

2

. Then

recheck.
If circuit is not as specified, replace the circuit plate.
*1 : Fuel Receiver Gauge and Engine Coolant Temperature Re-
ceiver Gauge
*2 : Speedometer and Tachometer

I03501

Wire Harness Side

Connector ”W”

Connector ”X”

Connector ”Z”

Connector ”Y”

BE–102

–

BODY ELECTRICAL

COMBINATION METER

1965

4.

INSPECT COMBINATION METER CIRCUIT PLATE
From meter ECU main circuit plate to meter ECU sub
circuit plate:

Disconnect connector ”W”, ”X”, ”Y” and ”Z” from the combina-
tion meter and inspect the connectors on the wire harness side
as follows.

Terminal

Specified value

W1 – Y1

Continuity

W2 – Y2

Continuity

W3 – Y3

Continuity

W4 – Y4

Continuity

W5 – Y5

Continuity

W6 – Y6

Continuity

W7 – Y7

Continuity

W8 – Y8

Continuity

W9 – Y9

Continuity

W10 – Y10

Continuity

W11 – Y11

Continuity

W12 – Y12

Continuity

X1 – Z1

Continuity

X2 – Z2

Continuity

X3 – Z3

Continuity

X4 – Z4

Continuity

X5 – Z5

Continuity

X6 – Z6

Continuity

X7 – Z7

Continuity

X8 – Z8

Continuity

X9 – Z9

Continuity

X10 – Z10

Continuity

X11 – Z11

Continuity

X12 – Z12

Continuity

If circuit is not as specified, replace the wire harness.

–

BODY ELECTRICAL

COMBINATION METER

BE–103

1966

5.

INSPECT RHEOSTAT LIGHT CONTROL
(See page 

BE–62

)

6.

INSPECT COMBINATION METER ILLUMINATION

NOTICE:
To avoid damage to the computer, be careful of the follow-
ing.

Do not make an error with another terminal number.

Do not cause a short with another terminal.

Connect the connectors ”P”, ”Q” and ”H”.

7.

INSPECT SPEEDOMETER ON–VEHICLE

Using a speedometer tester, inspect the speedometer for allow-
able  indication error and check the operation of the odometer.
HINT:
Tire wear and tire over or under inflation will increase the indica-
tion error.
If error is excessive, replace the speedometer.

mph (USA)

km/h (CANADA)

  Standard indication

Allowable range

  Standard indication

Allowable range

        20

18.5 – 21.5

        20

18 – 23

        40

40 – 43

        40

38 – 42

        60

60.5 – 64

        60

57 – 61.5

        80

81 – 85

        80

76.5 – 81.5

        100

102 – 107

        100

96.5 – 101.5

        120

122.5 – 128.5

        120

116 – 121.5

        140

136 – 142

        160

155.5 – 162.5

        180

175 – 183

        200

194.5 – 203.5

8.

INSPECT TACHOMETER ON–VEHICLE

(a)

Connect a tune–up test tachometer, and start the engine.

NOTICE:
Reversing the connection of the tachometer will damage
the transistors and diodes inside.
(b)

Compare the tester and tachometer indications.

If error is excessive, replace the tachometer.

RPM(DC 13.5 V, 25 

°

C (77

°

F))

Standard indication

Allowable range

700

630 – 770

1000

925 – 1125

2000

1900 – 2200

3000

2845 – 3305

4000

3870 – 4330

5000

4925 – 5320

7000

6875 – 7475