Page 1457 of 5135
05C3C±01
NAVIGATION SYSTEM Check SheetInspector 's name:
Customer 's Name
Date of VehicleVIN
Production Date
Licence No.
Odometer Reading / /km
Mile
Frequency Problem Occurs
/ /
Always Intermittent ( Times a day) Brought in
Cursor movement is defective.
Date Problem First Occurred
Problem Symptom
Cursor does not move.
GPS mark does not appear.
Map is not displayed.
Screen is dark.
Screen is white.
Color is not uniform.
Screen is out of order.
Cannot operate with navigation controller assy Others ( )
Others ( )
Others ( ) Navigation
malfunction
Display
malfunction
Control
Switch
malfunction
Navigation ECU
Radio Receiver Assy
DTC Check
Parts name 1st time malfunction code. 2nd time malfunction code.
Multi±display (CRT display) Display
Body ECU
± DIAGNOSTICSNAVIGATION SYSTEM
05±1437
AVENSIS REPAIR MANUAL (RM1018E)
CUSTOMER PROBLEM ANALYSIS CHECK
Page 1458 of 5135
05C3B±01
±
DIAGNOSTICS NAVIGATION SYSTEM
05±1435
AVENSIS REPAIR MANUAL (RM1018E)
NAVIGATION SYSTEM
HOW TO PROCEED WITH TROUBLESHOOTING
1Vehicle Brought to Workshop
2Customer Problem Analysis (See page 05±1437)
3 Problem Symptom Confirmation
Symptom does not occur (Go to step 4)
Symptom occurs (Go to step 5)
4Symptom Simulation (See page 01±32)
5DTC Check (See page 05±1438)
Normal code (Go to step 7)
Malfunction code (Go to step 6)
6DTC Chart (See page 05±1453)
Go to step 8
7Problem Symptoms Table (See page 05±1464)
8 Circuit Inspection and Part Inspection
9 Indemnification of Problem
Page 1459 of 5135
05±1436
± DIAGNOSTICSNAVIGATION SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
10 Repair or Replace
11 Confirmation Test
End
Page 1460 of 5135
I35619
Steering Pad SW LH
AU1
AU2
EAU12
11
10LG
P
W±RR117
8
6SW1
SW2
GND Radio Receiver Assy
R11
R11 S15
S15
S15 05±1432
± DIAGNOSTICSAUDIO SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
A AUDIO SYSTEM CANNOT BE OPERATED WITH STEERING PAD
SWITCH
WIRING DIAGRAM
05C55±01
Page 1461 of 5135
I35662
AU1
AU2 EAU
± DIAGNOSTICSAUDIO SYSTEM
05±1433
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1 INSPECT STEERING WHEEL ASSY(AU1, AU2, EAU)
(a) Remove the steering pad switch LH.
(b) Check continuity between terminals at each condition, as
shown in the chart.
Standard:
Tester connectionConditionSpecified condition
AU1 ± EAUDo not switch positionApprox. 100 k
AU1 ± EAUSEEK+ switch: push0
AU1 ± EAUSEEK± switch: pushApprox. 0.3 k
AU1 ± EAUVOL+ switch: pushApprox. 1 k
AU1 ± EAUVOL± switch: pushApprox. 3.2 k
AU1 ± EAUDo not switch positionApprox. 100 k
AU1 ± EAUMODE switch: push0
NG REPLACE STEERING WHEEL ASSY
OK
Page 1462 of 5135
I37571
Steering Wheel Assy:Radio Receiver Assy:
SW2
EAU AU2AU1
SW1
GND
05±1434
±
DIAGNOSTICS AUDIO SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
2CHECK HARNESS AND CONNECTOR(STEERING WHEEL ASSY ± RADIO RECEIVER ASSY)
(a)Disconnect the connectors from the steering wheel assy
and radio receiver assy.
(1)Check continuity between terminals at each condi-tion, as shown in the chart.
Standard:
Tester connectionSpecified condition
SW1± ± AU1Continuity
SW2 ± AU2Continuity
GND ± EAUContinuity
(2)Check for a short between terminals at each condi- tion, as shown in the chart.
Standard:
Tester connectionSpecified condition
SW1 ± Body groundNo continuity
SW2 ± Body groundNo continuity
GND ± Body groundNo continuity
NGREPAIR OR REPLACE HARNESS OR CONNECTOR (See page 01±32)
OK
REPLACE RADIO RECEIVER ASSY
Page 1463 of 5135

N17398
HeadCapstan
Pinch Roller
± DIAGNOSTICSAUDIO SYSTEM
05±1431
AVENSIS REPAIR MANUAL (RM1018E)
TAPE IS TANGLED DUE TO INCORRECT TAPE SPEED OR
AUTO±REVERSE MALFUNCTION
INSPECTION PROCEDURE
1 CHECK FOR ANY FOREIGN OBJECT
(a) Check for any foreign objects.
(1) Check that no foreign objects or defects are detected in the cassette tape player of radio receiver
assy.
Standard: No foreign objects or defects detected.
NG REMOVE FOREIGN OBJECT
OK
2 REPLACE CASSETTE TAPE WITH ANOTHER AND RECHECK(BELOW 90 MIN.)
(a) Replace the cassette tape with another and recheck.
(1) Replace the cassette tape with another normal one (90min or less) to see if the same trouble
occurs again.
Standard: Malfunction disappears.
OK CASSETTE TAPE FAULTY
NG
3 CLEAN HEAD AND CHECK OPERATION
(a) Head cleaning
(1) Raise the cassette door with your finger. Next, using
a pencil or similar object, push in the guide.
(2) Using a cleaning pen or cotton applicator soaked in
cleaner, clean the head surface, pinch rollers and
capstans.
(3) Check that the same trouble occurs again.
Standard: Malfunction disappears.
OK HEAD DIRTY
NG
REPLACE RADIO RECEIVER ASSY
0549V±10
Page 1464 of 5135

N17398
HeadCapstan
Pinch Roller
05±1430
± DIAGNOSTICSAUDIO SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
SOUND QUALITY IS BAD ONLY WHEN PLAYING TAPE
INSPECTION PROCEDURE
1 REPLACE CASSETTE TAPE WITH ANOTHER AND RECHECK
(a) Replace the cassette tape with another and recheck.
(1) Replace the cassette tape with another normal one to see if the same trouble occurs again.
Standard: Malfunction disappear.
OK CASSETTE TAPE FAULTY
NG
2 CHECK FOR ANY FOREIGN OBJECT
(a) Check for foreign objects.
(1) Check that no foreign material and troubles are detected in the radio receiver assembly cassette
tape player.
Standard: No foreign objects or defects detected.
NG REMOVE FOREIGN OBJECT
OK
3 CLEAN HEAD AND CHECK OPERATION
(a) Head cleaning
(1) Raise the cassette door with your finger. Next, using
a pencil or similar object, push in the guide.
(2) Using a cleaning pen or cotton applicator soaked in
cleaner, clean the head surface, pinch rollers and
capstans.
(3) Check that the same trouble occurs again.
Standard: Malfunction disappears.
OK HEAD DIRTY
NG
REPLACE RADIO RECEIVER ASSY
0549U±10