Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual — part 1327
8–228 ELECTRICAL-BODY AND CHASSIS
TACHOMETER
1.
Tachometer does not function when engine is running
Checkpoint
Trouble Cause
Countermeasure
Tacho sensor malfunction,
or open circuit or poor
connector contact
Replace the tacho sensor,
or repair open circuit or
connector contact
Pulse between connector
3 B-24 and the ground
when engine is running
(Should be pulse present)
Tachometer malfunction
Replace the tachometer
Tachometer function
OK
NG
NG
2.
Meter needle fluctuates
(May be wide fluctuation)
Tachometer malfunction
Replace the tachometer
Use a meter tester to check
the tachometer function
NG
ELECTRICAL-BODY AND CHASSIS 8–229
TEMPERATURE GAUGE AND THERMO UNIT
1.
No temperature indicates at all
Checkpoint
Trouble Cause
Countermeasure
Thermo unit malfunction
Replace the thermo unit
Thermo unit continuity
between connector 1 E-4
(or 1 C-71 ) and the
ground (Diesel engine:
1 E-19 and the ground)
Gauge malfunction
Replace the temperature
gauge
Gauge function
1. Disconnect the unit con-
nector then connect 3.4W
bulb to wire harness side
with ground
2. Check indicating point
when starter SW. is ON
position (Temperature
should indicate)
Open circuit or poor
connector contact
Repair open circuit or
connector contact
Continuity between 1 E-4
(or 1 C-71 ) and 6 B-24
(Diesel engine: 1 E-19 and
6 B-24
OK
OK
NG
NG
NG
2.
Temperature gauge incorrect readings in all ranges
Thermo unit malfunction
Replace the thermo unit
Thermo unit resistance
between connector 1 E-4
(or 1 C-71 ) and the
ground (Diesel engine:
1 E-19 and the ground)
when disconnecting the
connector (Specified
resistance should indicate)
NG
8–230 ELECTRICAL-BODY AND CHASSIS
FUEL GAUGE AND FUEL TANK UNIT
1.
No fuel level indicates at all
Checkpoint
Trouble Cause
Countermeasure
Open circuit inside the tank
unit
Replace the tank unit
Tank unit continuity
between connector 1 F-1
and ground
Gauge malfunction
Replace the fuel gauge
Fuel gauge function
1. Disconnect the tank unit
connector then connect
3.4W bulb to wire
harness side
2. Check indicating point
when starter SW. is ON
position (Fuel level
should indicate)
Open circuit or poor
connector contact
Repair open circuit or
connector contact
Continuity between
connectors 11 B-23 and
1 F-1
OK
OK
NG
NG
NG
2.
Fuel gauge gives incorrect readings in all ranges
Tank unit malfunction
Replace the tank unit
Tank unit resistance
position with the float at
checking points (Specified
resistance should indicate)
NG
ELECTRICAL-BODY AND CHASSIS 8–231
WARNING AND INCIDATOR LIGHT
1.
When the parking brake lever is pulled, the indicator light does not light up
Checkpoint
Trouble Cause
Countermeasure
Bulb burned out or loose
contact
Replace or reinstall the bulb
Brake indicator light bulb
continuity
NG
Incorrect SW. adjustment
or poor SW. point contact
Adjust or replace the
parking brake SW.
Parking brake SW.
installation position and
function
NG
OK
Open circuit or poor
connector contact
Repair open circuit or
connector contact
Continuity between the
parking brake SW.
connector 1 C-39 (4x4:
1 R-4 ) and 12 B-23
NG
OK
Parking brake SW.
malfunction
Replace the parking brake
SW.
Continuity between the
parking brake SW.
connector 1 C-39 (4x4:
1 R-4 ) and the ground
when the parking brake is
operated
NG
OK
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