Page 3425 of 4555

NAVIGATION SYSTEM
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Power Supply and Ground Circuit Check for Transfer UnitEKS00F38
1. CHECK FUSE
Check that the following fuses of the transfer unit are not blown.
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of problem before installing new fuse. Refer to PG-2,
"POWER SUPPLY ROUTING" .
2. POWER SUPPLY CIRCUIT CHECK
Check voltage between transfer unit and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. GROUND CIRCUIT CHECK
1. Turn ignition switch OFF.
2. Disconnect transfer unit connector.
3. Check continuity between transfer unit and ground.
OK or NG
OK >> INSPECTION END
NG >> Repair or replace harness.
UnitTerminals
Power source Fuse No.
Connector Terminal (wire color)
Transfer unit M11131 (Y/G)
Battery 32
32 (Y/G)
29 (GY/L) Ignition switch ACC or ON 4
UnitTerminals
OFF ACC ON (+)
(-)
ConnectorTerminal
(wire color)
Transfer
unitM 11131 (Y/G)
GroundBattery
voltageBattery
voltageBattery
voltage
32 (Y/G)Battery
voltageBattery
voltageBattery
voltage
29 (GY/L) 0VBattery
voltageBattery
voltage
SKIA9079E
UnitTerminals
Continuity (+)
(-)
Connector Terminal (wire color)
Transfer unit M11125 (B/R)
Ground Yes
27 (B/R)
SKIA9081E
Page 3426 of 4555

AV-84
NAVIGATION SYSTEM
Power Supply and Ground Circuit Check for TMC TunerEKS00LYK
1. CHECK FUSE
Make sure that the following fuses of TMC tuner are not blown.
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to PG-
2, "POWER SUPPLY ROUTING" .
2. CHECK POWER SUPPLY CIRCUIT
Check voltage between TMC tuner harness connector terminals and
ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect TMC tuner connector.
3. Check continuity between TMC tuner harness connector M123
terminal 8 (B/R) and ground.
OK or NG
OK >> INSPECTION END
NG >> Repair harness or connector.
UnitTerminals
Power source Fuse No.
Connector Terminal (wire color)
TMC tuner M1235 (Y/G) Battery 32
7 (GY/L) Ignition switch ACC or ON 4
UnitTerminals
OFF ACC ON (+)
(-)
ConnectorTe r m i n a l
(wire color)
TMC
tunerM1235 (Y/G)
GroundBattery
voltageBattery
voltageBattery
voltage
7 (GY/L) 0VBattery
voltageBattery
voltage
SKIB4007E
8 (B/R) – Ground : Continuity should exist.
SKIB4008E
Page 3427 of 4555

NAVIGATION SYSTEM
AV-85
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Communication Line Check (Between NAVI Control Unit and TMC Tuner)EKS00LYL
Symptom: “RDS-TMC Tuner” is not displayed on self-diagnosis screen.
1. CHECK TMC TUNER POWER SUPPLY AND GROUND CIRCUIT
Check TMC tuner power supply and ground circuit. Refer to AV- 8 4 , "
Power Supply and Ground Circuit Check
for TMC Tuner" .
OK or NG
OK >> GO TO 2.
NG >> Repair malfunctioning parts.
2. CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect NAVI control unit and TMC tuner connectors.
3. Check continuity between NAVI control unit harness connector
M117 terminals 47 (P), 48 (L) and TMC tuner harness connector
M123 terminals 1 (P), 2 (L).
4. Check continuity between NAVI control unit harness connector
M117 terminals 47 (P), 48 (L) and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3. CHECK NAVI CONTROL UNIT AND TMC TUNER
1. Replace NAVI control unit or TMC tuner.
2. Turn ignition switch ON.
3. Start self-diagnosis, and check if any malfunction is detected from the self-diagnosis result.
Is any malfunction detected from self
-diagnosis result?
YES >> Replace the other unit.
NO >> INSPECTION END
Communication Line Check (Between Display and NAVI switch) EKS00F39
1. CHECK POWER SUPPLY AND GROUND CIRCUIT
Check system of power supply and ground circuit display. Refer to AV- 8 1 , "
Power Supply and Ground Circuit
Check for Display" .
OK or NG
OK >> GO TO 2.
NG >> Check the malfunctioning parts.47 (P) – 1 (P) : Continuity should exist.
48 (L) – 2 (L) : Continuity should exist.
47 (P), 48 (L) – Ground : Continuity should not exist.
SKIB3991E
Page 3428 of 4555

AV-86
NAVIGATION SYSTEM
2. CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect display connector and NAVI switch connector.
3. Check continuity between display harness connector M112 ter-
minal 15 (R) and NAVI switch harness connector M113 terminal
4 (R).
4. Check continuity between display harness connector M112 ter-
minal 15 (R) and ground.
OK or NG
OK >> Replace display.
NG >> Repair harness or connector.
Communication Line Check (Between NAVI Switch and Transfer Unit)EKS00F3A
1. CHECK POWER SUPPLY AND GROUND CIRCUIT
Check system of power supply and ground circuit NAVI switch. Refer to AV- 8 2 , "
Power Supply and Ground
Circuit Check for NAVI Switch" .
OK or NG
OK >> GO TO 2.
NG >> Check the malfunctioning parts.
2. CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect NAVI switch connector and transfer unit connector.
3. Check continuity between NAVI switch harness connector M113
terminal 5 (G), 6 and transfer unit harness connector M111 ter-
minal 18 (G), 15.
4. Check continuity between NAVI switch harness connector M113
terminal 5 (G), 6 and ground.
OK or NG
OK >> Replace NAVI switch.
NG >> Repair harness or connector.
Communication Line Check (Between NAVI Control Unit and Transfer Unit) EKS00F3B
1. CHECK POWER SUPPLY AND GROUND CIRCUIT
Check system of power supply and ground circuit NAVI control unit. Refer to AV- 8 0 , "
Power Supply and
Ground Circuit Check for NAVI Control Unit" .
OK or NG
OK >> GO TO 2.
NG >> Check the malfunctioning parts. 15 (R) - 4 (R) : Continuity should exist.
15 (R) - Ground : Continuity should not exist.
SKIA9222E
5 (G) - 18 (G) : Continuity should exist.
6 - 15 : Continuity should exist.
5 (G), 6 - Ground : Continuity should not exist.
SKIA9223E
Page 3429 of 4555
NAVIGATION SYSTEM
AV-87
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2. CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect NAVI control unit connector and transfer unit connector.
3. Check continuity between and NAVI control unit harness con-
nector M117 terminal 43, 44 * , 45 (Y) and transfer unit harness
connector M111 terminal 9, 11*, 13 (Y).
*: LHD model (BR), RHD model (R/L)
4. Check continuity between NAVI control unit harness connector
M117 terminal 43, 44*, 45 (Y) and ground.
*: LHD model (BR), RHD model (R/L)
OK or NG
OK >> Replace NAVI control unit.
NG >> Repair harness or connector.43 - 9 : Continuity should exist.
44* - 11* : Continuity should exist.
45 (Y) - 13 (Y) : Continuity should exist.
43, 44*, 45 (Y) - Ground : Continuity should not exist.
PKIC0534E
Page 3430 of 4555
AV-88
NAVIGATION SYSTEM
Communication Line Check (Between Transfer Unit and Display) EKS00F3C
1. CHECK POWER SUPPLY AND GROUND CIRCUIT
Check system of power supply and ground circuit transfer unit. Refer to AV- 8 3 , "
Power Supply and Ground
Circuit Check for Transfer Unit" .
OK or NG
OK >> GO TO 2.
NG >> Check the malfunctioning parts.
2. CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect transfer unit connector and display connector.
3. Check continuity between transfer unit harness connector M111
terminal 19, 20 (L) and display harness connector M112 terminal
17, 16 (L).
4. Check continuity between transfer unit harness connector M111
terminal 19, 20 (R/L) and ground.
OK or NG
OK >> Replace transfer unit.
NG >> Repair harness or connector.19 - 17 : Continuity should exist.
20 (L) - 16 (L) : Continuity should exist.
19, 20 (L) - Ground : Continuity should not exist.
SKIA9225E
Page 3431 of 4555

NAVIGATION SYSTEM
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Vehicle Speed Signal CheckEKS00F3D
1. VEHICLE SPEED OPERATION CHECK
Does speedometer operate normally?
Ye s o r N o
Ye s > > G O T O 2 .
No >> Check combination meter trouble diagnosis. Refer to DI-28, "
Vehicle Speed Signal Inspection
[With ESP]" in “COMBINATION METERS”.
2. HARNESS CHECK
1. Turn the ignition switch OFF.
2. Disconnect NAVI control unit connector and combination meter connector.
3. Check continuity between NAVI control unit harness connector
M117 terminal 28 (LG) and Unified meter control unit harness
connector M44 terminal 11 (LG).
4. Check continuity between NAVI control unit harness connector
M117 terminal 28 (LG) and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3. VEHICLE SPEED SIGNAL CHECK
1. Connect NAVI control unit and combination meter connector.
2. Start engine and drive vehicle at more than 40 km/h (25MPH).
3. Check the signal between NAVI control unit harness connector
M117 terminal 28 (LG) and ground with CONSULT-II or oscillo-
scope.
OK or NG
OK >> Replace NAVI control unit.
NG >> Check combination meter system. Refer to DI-22, "
Diagnosis Flow" in “COMBINATION
METERS”. 28 (LG) - 11 (LG) : Continuity should exist.
28 (LG) - Ground : Continuity should not exist.
SKIA9105E
28 (LG) – Ground : Refer to AV- 6 2 , "Terminals and
Reference Value for NAVI Control
Unit" .
SKIA9106E
Page 3432 of 4555
AV-90
NAVIGATION SYSTEM
Illumination Signal CheckEKS00F3E
1. TAIL LAMP OPERATION CHECK
When lighting switch turned 1st or 2nd position, does tail lamp illuminate?
YES or NO
YES >> GO TO 2.
NO >> Go to tail lamp trouble diagnosis.
2. ILLUMINATION SIGNAL CHECK
Check voltage between NAVI control unit and ground.
OK or NG
OK >> Replace NAVI control unit.
NG >> Repair harness or connector.
Ignition Signal CheckEKS00F3F
1. IGNITION SIGNAL CHECK
1. Turn the ignition switch ON.
2. Check voltage between NAVI control unit harness connector
M117 terminal 26 (G) and ground.
OK or NG
OK >> Replace NAVI control unit.
NG >> Check the following.
10A fuse [No. 5, located in fuse block (J/B)]
Harness for open or short between NAVI control unit
and fuse
Terminals
Lighting
switch
positionVoltag e (+)
(–)
Connector Terminal (wire color)
M117 25 (R/L) Ground1st or 2nd
positionBattery voltage
OFF Approx. 0V
SKIA9107E
26 (G) - Ground : Battery voltage
SKIA9108E