SAFARI

TRANSFER CASE

Self Diagnosis of ECU :

Refer fig. 4&5

ECU detects transfer case system malfunctions and

indicates malfunctioning part (s) through flashing

indictor light mounted on dashboard. The operator

will be alerted of fault condition by continuous

illumination of both 4WD HI and 4WD LO lights, on

dash board when ignition is on.

A Service connector is provided to indicate the fault

codes in binary.Connect one end of service connector

in to the pin hole No. 22 in ECU connector and other

end to the ignition switch. (In case a connector is

provided to hole No. 22. Connect the end to it.) The

flashing (ON/OFF) of indicator light will show Binary

code (as illustrated in the table). Identify the

malfunctioning part and replace it.

L1 L2 L3 Binary Decimal Fault with

Code

Equivalent

Off Off On 001

ECUModule

Off On Off

010

Shift Motor

Off On On 011

Synchro-

nizer Clutch

On Off Off

100

Speed

Sensor

On On Off

110

Selector

switch

On On On 111

Motor

Position

switch

DiagnosticTable

Connect a service connector.

Turn the ignition switch on. 4WD CHECK indicator will

turn on for a fraction of second and turn off for 3

seconds.

Then it will display a defective code 3 times

continuously.

NO.

Defect Codes

Malfunc-

tioning

Part

ECU

Shift

Motor

Synchro

nizer

Clutch

Speed

Sensor

Selector

Switch

Motor

Position

Sensor

Fig. 4

Fig. 5

If only one part is malfunctioning, the indicator light

will display defective code three times continuously.

If more than two parts are malfunctioning, the first

malfunctioning part will be displayed three times and

then the other malfunctioning parts will be displayed.

After repair, clear the fault stored in thememory.Ground

the service connector and keep ignition 'on' for five

seconds to erase defective code.

Note :

Before replacing the malfunctioning parts

with defective code. Check the wires and

connectors for proper condition.

Use only 12V 3Watt bulb for diagnostic

purpose.