Isuzu Trooper (2000 year). Manual - part 97

DRIVE LINE CONTROL SYSTEM (TOD)

4B2–8

Functions of Indicator Lamp

TOD Indicator Lamps

C07RY00017

Indication of Drive Mode
The transfer lever position signals are transmitted to the
TOD indicator lamp control unit according to the
conditions listed below.

Indication During Transition of Transfer Lever
When the transfer lever is shifted, and the signals from
the AXLE switch do not comply with the signal conditions
of the 4H and 4L switch, the transfer lever position signals
generated by the 4H and 4L switch and the N position
signals are repeatedly output at an interval of 0.8 second.

NOTE: After the transfer lever is set to the specified
position and the AXLE switch generates compliant
signals, the normal output status is returned.

4B2–9

DRIVE LINE CONTROL SYSTEM (TOD)

C07RW015

Bulb Check
When the starter switch is turned on, the TOD indicator
lamps go on as shown below.

NOTE: Once the starter switch is turned on, all the TOD
indicator lamps are lit for two seconds even if the transfer
lever is in any position.

C07RW016

DRIVE LINE CONTROL SYSTEM (TOD)

4B2–10

Simplified checking method of ABS IN and BRAKE ON signals:
In the event that any of the signal inputs listed below are
observed while the self-diagnostic code is being
displayed (the self-diagnostic connector is short-circuited
to GND), you can simply check the ABS IN and BRAKE
ON signals as shown in the figures below.

C07RW017–1

Check Lamp

Check Lamp Bulb Check
When the starter switch is turned on in the normal state,
the control unit turns on the CHECK lamp to check the
bulb.

C07RW019

4B2–11

DRIVE LINE CONTROL SYSTEM (TOD)

Diagnosis

General Information Diagnosis

The troubles on TOD are classified into the group that can
be identified by the lighting status of the TOD indicator
lamps and those that can be recognized as abnormal
phenomena of the vehicle by the driver.
The troubles that can be identified by the lighting status of
the TOD indicator lamps are examined by the procedures
“Diagnosis from Trouble Codes” and “Trouble Diagnosis
Depending on The Status of TOD Indicator”.  The troubles
that can be recognized as abnormal phenomena of the
vehicle by the driver are examined by the procedure
“Diagnosis from symptom”.

Self-diagnosis

The control unit has a function of self-diagnosis.  If a
trouble occurs in the course of system startup, the control
unit blinks the CHECK lamp and saves the trouble code.

C07RW021

NOTE: If an intermittent fault occurs, the control unit
stops blinking upon removal of the fault.  The trouble code
is saved to the control unit.