Isuzu KB P190. Manual — part 1325

8A-362 ELECTRICAL-BODY AND CHASSIS

Tachometer Off-Vehicle Inspection

Remove the tachometer from the meter assembly and
measure the resistance value and the current consumption
between each terminal.

SELF DIAGNOSTIC FUNCTION

Check that the speedometer, tachometer, fuel gauge, and
temperature gauge operate properly.

821R300033

Entering the self-diagnostic mode
1. Push in and hold the “Change Indicator and Reset” knob.

2. Turn the ignition ON.

3. When the LCD odometer turns ON, release the “Change

Indicator and Reset” knob.

4. Push in and release the “Change Indicator and Reset” knob

three times in quick succession.

The meter cluster is now in “Self-diagnostic” mode.

NOTE: Steps 2-4 must be performed within 7 seconds.

The meter cluster will not enter “Self-diagnostic” mode if any of

the following conditions occur:

1. The “Change Indicator and Reset” knob is not depressed

when the ignition is turned ON.

2. The “Change Indicator and Reset” knob is released within

600ms of turning the ignition ON.

3. The “Change Indicator and Reset” knob is not depressed

and released three times within 7 seconds.

ELECTRICAL-BODY AND CHASSIS 8A-363

Self –diagnostic mode
LCD condition
• All LCDs are lit during the transition from self-diagnostic

decision mode to self-diagnostic mode

• The odometer/trip indicator scrolls throng its entire range

approximately once every 600 ms. All digits are lit (segment

check indication). This continues until the self-diagnostic

mode is terminated.

Meter and gauge indications
Meter and gauge indications with the change indicator and
reset knob on (self-diagnostic mode) are as shown in the
following table.

RTW78ASF000101

Speedometer

100 kilometers per hour

Tachometer 3,000

rpm

Fuel gauge

Temperature gauge

Mid-point on the dial

All indications return to zero when the change indicator and
reset knob is turned off.
The self-diagnostic mode and the self-diagnostic decision
mode are cancelled when the ignition switch is turned to the
OFF position. They also cancel when a speed pulse is sensed.
If either of the self-diagnostic modes are cancelled by turning
the ignition switch to the OFF position, the diagnostic unit
remains in the stand-by condition.
If cancellation occurs when a speed pulse is sensed, the unit
remains in the ordinary operating condition.

8A-364 ELECTRICAL-BODY AND CHASSIS

Meter connector pin arrangement

RTW780XF007401

ELECTRICAL-BODY AND CHASSIS 8A-365

Connector

Ter-

No.

minal No.

B23

1 Power

ground

2 Cruise

main

3 Charge

4 Brake

5

ABS control unit

6 Fuel

consumption

7 Tachometer

pulse

8 Speedometer

pulse

9 Rheostat

10 Taillight

relay

11 -

12 -

13

Ambient temperature sensor

14 Seat

belt

15

Key remind switch

16

Engine coolant temperature sensor

17

Fuel gauge unit and sender

18 Fuel

level

19 Sedimenter

20 Door

ajar

21 Power

drive

22 3rd

start

23 Fuel

filter

24 Cruise

set

25 Check

trans

26 SVS

27 4WD

28

4WD - L

29

A/T oil temperature

30 Check

4WD

31 CAN

(+)

32 CAN

(-)

33

Turn signal - LH

34 ABS

35 Glow

36 -

37

Hi – beam (+)

38 Check

engine

39 Oil

pressure

40

SRS control unit

Connector

Ter-

No.

minal No.

B24

1 Signal

ground

2 SRS

ground

3

A/T shift indicator “3”

4

A/T shift indicator “D”

5

A/T shift indicator “N”

6

A/T shift indicator “R”

7

A/T shift indicator “P”

8 Ignition

9

Ambient temperature sensor

10

RR fog light

11

FRT fog light

12

A/T shift indicator “2”

13

A/T shift indicator “L”

14

Turn signal - RH

15

Door SW - driver

16 Power

source