4jh1 ISUZU TF SERIES 2004 Repair Manual

ELECTRICAL-BODY AND CHASSIS 8A-247

CIRCUIT DIAGRAM 4JA1-TC / 4JH1-TC (LHD) G.EXP Sheet 2/3




RTW48AXF007501

8A-248 ELECTRICAL-BODY AND CHASSIS

CIRCUIT DIAGRAM 4JA1-TC / 4JH1-TC (LHD) G.EXP Sheet 3/3




RTW48AXF007701

ELECTRICAL-BODY AND CHASSIS 8A-249

CIRCUIT DIAGRAM 4JA1-TC / 4JH1-TC (LHD) EUROPE Sheet 1/3




RTW48AXF005301

8A-250 ELECTRICAL-BODY AND CHASSIS

CIRCUIT DIAGRAM 4JA1-TC / 4JH1-TC (LHD) EUROPE Sheet 2/3




RTW48AXF005401

ELECTRICAL-BODY AND CHASSIS 8A-251

CIRCUIT DIAGRAM 4JA1-TC / 4JH1-TC (LHD) EUROPE Sheet 3/3




RTW48AXF005501

ELECTRICAL-BODY AND CHASSIS 8A-261
2. Even when the parking brake lever is pulled, the indicator light does not go off

Checkpoint Trouble Cause Countermeasure

Adjust the SW. installation
position or replace the parking
brake SW. Incorrect the parking brake
SW. adjustment or brake SW.
faulty
NG Thermo unit malfunction
Replace the brake fluid level
SW., or vacuum SW., or
repair a short circuit between
the parking brake SW.
connector 1
C-39
(Lever: 1
R-4) and 9 B-23
or the brake fluid level SW.
connector 2
C-37 and 9
B-23, (or the vacuum SW.
connector 1
C-38 and 9
B-23 : 4JH1-TC ONLY)
Check to see if the indicator
light goes off when the parking
brake SW. connector 1
C-39
(Lever: 1
R-4) is
di t d
Brake fluid level SW. or
vacuum SW. faulty or short
circuit
NG OK

Parking brake SW. installation
position and function




3. Oil pressure warning light does not go off while engine is running


Refer to ENGINE Section

Refer to ENGINE Section
NG Thermo unit malfunction

Repair a short circuit between
1
E-1 and 3 B-24

Check to see the warning light
goes off when the oil pressure
SW. connector
1
E-1 is disconnected


Short circuit


Replace the oil pressure unit
(or the oil pressure SW.)
Continuity between the oil
pressure SW. connector
1
E-1 and the body ground
when the engine is operating


Oil pressure unit (or oil
pressure SW) faulty
NG NG OK
OK

Engine oil pressure

ELECTRICAL-BODY AND CHASSIS 8A-267

With Tachometer (4JA1-TC / 4JH1-TC)



RTW48AXF006101

8A-270 ELECTRICAL-BODY AND CHASSIS

RTW38DSH000401


6VE1 rpm

Indication Permissible Range
750 690-770
1,000 900-1,060
2,000 1,820-2,070
3,000 2,820-3,120
4,000 3,820-4,180
5,000 4,820-5,180
6,000 5,820-6,180
7,000 6,820-7,180

RTW38DSH000501

4JH1-TC rpm

Indication Permissible Range
750 690-810
2,000 1,875-2,125
3,000 2,850-3,150
4,000 3,820-4,180
5,000 4,820-5,180

ELECTRICAL-BODY AND CHASSIS 8A-277
140R300007
Thermo Unit Inspection
INSPECTION
Use a circuit tester to measure the thermo unit resistance.
Replace the unit when the result of inspection is found
abnormal.


Temperature
Check
condition 60C
(140F) 115C
(239F)
Resistance
value ()
168 3.5 +2.5
30.9 –2.0
041R300002


Fuel Tank Unit Inspection
Measure the fuel tank unit resistance between the connector
terminals 1
F-2 and 3 F-2 while shifting the float from “E”
to “F” point.
Fuel Tank Resistance

Level Float position
mm Standard resistance

F (B) 217.5 +2.2
17 –0.8

1/2 (A) 105.1 (C24SE,
4JA1-L, 6VE1)
112.8 (4JA1-TC,
4JH1-TC)
45  4.5
E (C) 16.2 120  2.0

ELECTRICAL-BODY AND CHASSIS 8A-285
PARTS LOCATION


4JA1-TC / 4JH1-TC



4JA1-L



RTW38DXF007601 & RTW48ALF000101