Troubleshooting

PRELIMINARY CHECK

• Check cold tire inflation pressure.

• Check lubrication of suspension and steering linkage.

• Check chassis ground clearance and wheel alignment.

• Check battery voltage above 12 volts.

• Check that all connector are secure.

Troubleshooting No. 1: Initial check

Continued on page FA-31
Supra Mk3 Troubleshooting

Troubleshooting No. 2: No anti-squat function

Initial check (See page FA 30)

Do TEMS indicator lights indicate as shown below on sudden acceleration?

Ignition ON Oo not start engine

Sudden acceleration

Position\

S

M

F

S

M

F

Normal

ON

OFF

OFF

ON

ON

ON

Sport

ON

ON

OFF

ON

ON

ON

Check throttle position sensor and engine ECU circuit.

Check speed sensor and circuit.

Try another TE MS computer.

Road test again.

Repair or replace.

Initial check (See page FA 30)

Do TEMS indicator lights indicate as shown below when the steering wheel is turned sharply while driving at 40 km/h (25 mph)?

Vehicle i peed above 40 km/h (25 mph)

Sharp turn

\ Lights Po$ilion\

s

M

F

s

M

F

Normal

ON

OFF

OFF

ON

ON

ON

Sport

ON

ON

OFF

ON

ON

ON

Check steering sensor and circuit.

Check speed sensor and circuit.

Try another TEMS computer.

Troubleshooting No. 3: No anti-roll function

Road test again.

Bad

Repair or replace.

Bad

Troubleshooting No. 4: No anti-dive function

Initial check (See page FA-30)

Check stop light switch and circuit.

Check speed sensor and circuit.

Try another TE MS computer.

Do TEMS indicator below when brake is driving above 60 km

ights indicate as shown depressed while 'h (37 mph)?

Vehicle speed above 60 km/h (37 mph)

Oepreu brake pedal

\ L-ghts Position\

S

M

F

S

M

F

Normal

ON

OFF

OFF

ON

ON

ON

Sport

ON

ON

OFF

ON

ON

ON

Road test again.

Repair or replace.

Troubleshooting No. 5: No high speed response function

HINT: The high-speed response function only during normal base auto, and not during sport base auto.

Initial check (See page FA 30)

Do the TEMS indicator lights indicate as shown below when vehicle is gradually accelerated from below 100 km/h (63 mph) to above 120 km/h (75 mph)?

Vehicle speed less than

100 km/h <63 mph)

Vehicle speed above 120 km/h <76 mph)

\ Lights

S

M

F

S

M

F

Position\

Normal

ON

OFF

OFF

ON

ON

OFF

Check speed sensor and circuit.

Road test again.

Repair or replace.

Try another TEMS computer.

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