Page 737 of 4449

AV-146
NAVIGATION SYSTEM
Revision: 2004 November 2004 FX35/FX45
Power Supply and Ground Circuit Check for Display Control UnitAKS00BN8
1. CHECK FUSE
Make sure that the following fuses of the display control unit are not blown.
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate case of malfunction before installing new fuse. Refer to PG-3,
"POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Check voltage between display control unit 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 display control unit.
3. Check continuity between display control unit harness connector
M75 terminal 3 (B) and ground.
OK or NG
OK >> INSPECTION END
NG >> Repair harness or connector.
Unit Signal Fuse No.
Display control unitBattery power supply 32
ACC power supply 6
Terminals Ignition switch position
(+)
(–) OFF ACC ON
ConnectorTerminal
(Wire color)
M751 (W/L)
GroundBattery
voltageBattery
voltageBattery
voltage
10 (LG/R) 0VBattery
voltageBattery
voltage
SKIA8930E
3 – Ground : Continuity should exist.
PKIA2855E
Page 738 of 4449

NAVIGATION SYSTEM
AV-147
C
D
E
F
G
H
I
J
L
MA
B
AV
Revision: 2004 November 2004 FX35/FX45
Power Supply and Ground Circuit Check for DisplayAKS00BN9
1. CHECK DISPLAY CONTROL UNIT POEWR SUPPLY AND GROUND CIRCUIT
Check display control unit power supply and ground circuit. Refer to AV- 1 2 3 , "
Terminals and Reference Value
for Display Control Unit" .
OK or NG
OK >> GO TO 2.
NG >> Repair malfunctioning parts.
2. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between display harness connector M63 termi-
nals 2 (W/G), 3 (BR/W) and ground.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3. CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect display connector and display control unit connector.
3. Check continuity between display harness connector M63 termi-
nals 2 (W/G), 3 (BR/W) and display control unit harness connec-
tor M75 terminals 2 (W/G), 4 (BR/W).
4. Check continuity between display harness connector M63 termi-
nals 2 (W/G), 3 (BR/W) and ground.
OK or NG
OK >> Replace display control unit.
NG >> Repair harness or connector.
4. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect display connector.
3. Check continuity between display harness connector M63 termi-
nal 13 (P), 14 (P/L) and ground.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.2, 3 – Ground : Approx. 9V
SKIA8934E
2 – 2 : Continuity should exist.
3 – 4 : Continuity should exist.
2, 3 – Ground : Continuity should not exist.
SKIB0450E
13, 14 – Ground : Continuity should exist.
SKIB0448E
Page 739 of 4449
AV-148
NAVIGATION SYSTEM
Revision: 2004 November 2004 FX35/FX45
5. CHECK HARNESS
1. Disconnect display control unit connector.
2. Check continuity between display harness connector M63 termi-
nals 13 (P), 14 (P/L) and display control unit harness connector
M75 terminals 5 (P), 7 (P/L).
OK or NG
OK >> Replace display control unit.
NG >> Repair harness or connector.
6. CHECK GROUND CIRCUIT
Check continuity between display harness connector M63 terminal 1
(B) and ground.
OK or NG
OK >> INSPECTION END
NG >> Repair harness or connector.13 – 5 : Continuity shold exist.
14 – 7 : Continuity shold exist.
SKIB0449E
1 – Ground : Continuity should exist.
SKIB0451E
Page 740 of 4449

NAVIGATION SYSTEM
AV-149
C
D
E
F
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H
I
J
L
MA
B
AV
Revision: 2004 November 2004 FX35/FX45
Power Supply and Ground Circuit Check for A/C and AV SwitchAKS00BNA
1. CHECK FUSE
Make sure that the following fuses of the A/C and AV switch are not blown.
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate case of malfunction before installing new fuse. Refer to PG-3,
"POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Check voltage between AC and AV switch 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 A/C and AV switch connector.
3. Check continuity between A/C and AV switch harness connector
M64 terminals 5 (B) and ground.
OK or NG
OK >> INSPECTION END
NG >> Repair harness or connector.
Vehicle Speed Signal Check for NAVI Control UnitAKS00BNB
1. VEHICLE SPEED OPERATION CHECK
Does speedmeter is operated normally?
YES or NO
YES >> GO TO 2.
NO >> Check combination meter trouble diagnosis. Refer to DI-13, "
Diagnosis Flow" .
Unit Signal Fuse No.
A/C and AV switchBattery power supply 32
ACC power supply 6
Terminals Ignition switch position
(+)
(–) OFF ACC ON
ConnectorTe r m i n a l
(Wire color)
M641 (W/L)
GroundBattery
voltageBattery
voltageBattery
voltage
2 (LG/R) 0VBattery
voltageBattery
voltage
SKIA8937E
5 – Ground : Continuity should exist.
SKIA8938E
Page 741 of 4449

AV-150
NAVIGATION SYSTEM
Revision: 2004 November 2004 FX35/FX45
2. CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect NAVI control unit connector and unified meter and A/C amp. connector.
3. Check continuity between NAVI control unit harness connector
B207 terminal 28 (GY) and unified meter and A/C amp. harness
connector M56 terminal 26 (R/G).
4. Check continuity between NAVI control unit harness connector
B207 terminal 28 (GY) and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3. CHECK VEHICLE SPEED SIGNAL
1. Connect unified meter and A/C amp. connector.
2. Start engine.
3. Drive vehicle at a constant speed.
4. Check signal between NAVI control unit harness connector
B207 terminal 28 (GY) and ground with CONSULT-ll or oscillo-
scope.
OK or NG
OK >> INSPECTION END
NG >> Check combination meter system. Refer to DI-17, "
Veh i-
cle Speed Signal Inspection" .
Vehicle Speed Signal Check for Display Control UnitAKS00BNC
1. VEHICLE SPEED OPERATION CHECK
Does speedmeter is operated normally?
YES or NO
YES >> GO TO 2.
NO >> Check combination meter trouble diagnosis. Refer to DI-13, "
Diagnosis Flow" . 28 – 26 : Continuity should exist.
28 – Ground : Continuity should not exist.
PKIA2861E
28 – Ground : Refer to AV- 1 2 1 , "Terminals
and Reference Value for NAVI
Control Unit" .
PKIA2863E
Page 742 of 4449

NAVIGATION SYSTEM
AV-151
C
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MA
B
AV
Revision: 2004 November 2004 FX35/FX45
2. CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect display control unit connector and combination unified meter and A/C amp. connector.
3. Check continuity between display control unit harness connector
M75 terminal 16 (R/G) and unified meter and A/C amp. harness
connector M56 terminal 26 (R/G).
4. Check continuity between display control unit harness connector
M75 terminal 16 (R/G) and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3. CHECK VEHICLE SPEED SIGNAL
1. Connect unified meter and A/C amp. connector.
2. Start the engine.
3. Drive vehicle at a constant speed.
4. Check signal between display control unit harness connector
M75 terminal 16 (R/G) and ground with CONSULT-ll or oscillo-
scope.
OK or NG
OK >> INSPECTION END
NG >> Check unified meter and A/C amp. system. Refer to DI-
17, "Vehicle Speed Signal Inspection" .
Illumination Signal Check for NAVI Control UnitAKS00BND
1. CHECK ILLUMINATION SIGNAL
1. Check voltage between NAVI control unit harness connector ter-
minals and ground.
OK or NG
OK >> INSPECTION END
NG >> Repair harness or connector.16 – 26 : Continuity should exist.
16 – Ground : Continuity should not exist.
PKIA2864E
16 – Ground : Refer to AV- 1 2 3 , "Terminals
and Reference Value for Display
Control Unit" .
PKIA2866E
Terminals
Condition Voltage (+)
(–)
ConnectorTerminal
(Wire color)
B207 25 (R) GroundLighting switch is ON Approx. 12V
Lighting switch is OFF Approx. 0V
SKIB0315E
Page 743 of 4449

AV-152
NAVIGATION SYSTEM
Revision: 2004 November 2004 FX35/FX45
Illumination Signal Check for Display Control Unit AKS00BNE
1. CHECK ILLUMINATION SIGNAL
1. Check voltage between display control unit harness connector
terminals and ground.
OK or NG
OK >> INSPECTION END
NG >> Repair harness or connector.
Ignition Signal Check for NAVI Control UnitAKS00BNF
1. CHECK IGNITION SIGNAL
1. Turn ignition switch ON.
2. Check voltage between NAVI control unit harness connector
B207 terminal 26 (G) and ground.
OK or NG
OK >> INSPECTION END
NG >> Repair harness or connector.
Ignition Signal Check for Display Control UnitAKS00BNG
1. CHECK IGNITION SIGNAL
1. Turn ignition switch ON.
2. Check voltage between display control unit harness connector
M75 terminal 12 (G/R) and ground.
OK or NG
OK >> INSPECTION END
NG >> Repair harness or connector.
Reverse Signal Check for NAVI Control UnitAKS00BNH
1. CHECK REVERSE LAMP
1. Turn ignition switch ON.
2. Selector lever into R-position.
Does
“R” in the shift position indicator come on?
YES >> GO TO 2.
NO >> Check back-up lamp system. Refer to LT- 1 2 5 , "
BACK-UP LAMP" .
Terminals
Condition Voltage (+)
(–)
ConnectorTe r m i n a l
(Wire color)
M75 14 (R/L) GroundLighting switch is ON Approx. 12V
Lighting switch IS OFF Approx. 0V
SKIB0445E
26 – Ground : Battery voltage
SKIA8939E
12 – Ground : Battery voltage
SKIA8940E
Page 744 of 4449

NAVIGATION SYSTEM
AV-153
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MA
B
AV
Revision: 2004 November 2004 FX35/FX45
2. CHECK REVERSE SIGNAL
1. With the selector lever in R-position, check voltage between
NAVI control unit and ground.
OK or NG
OK >> INSPECTION END
NG >> Repair harness or connector.
Reverse Signal Check for Display Control UnitAKS00BNI
1. CHECK REVERSE LAMP
1. Turn ignition switch ON.
2. Selector lever into R-position.
Does
“R” in the shift position indicator come on?
YES >> GO TO 2.
NO >> Check back-up lamp system. Refer to LT- 1 2 5 , "
BACK-UP LAMP" .
2. CHECK REVERSE SIGNAL
1. With the selector lever in R-position, check voltage between dis-
play control unit and ground.
OK or NG
OK >> INSPECTION END
NG >> Repair harness or cnnector.
When Malfunctioning Connection Between Display Control Unit and NAVI Con-
trol Unit
AKS00BNJ
1. CHECK NAVI CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT
1. Check NAVI control unit power supply and ground circuit. Refer to AV- 1 4 5 , "
Power Supply and Ground
Circuit Check for NAVI Control Unit" .
OK or NG
OK >> GO TO 2.
NG >> Repair malfunctioning parts.
Terminals
Condition Voltage (+)
(–)
ConnectorTe r m i n a l
(Wire color)
B207 27 (OR) GroundSelect
leverR-position Approx. 12V
Except R-
positionApprox. 0V
SKIA9498E
Terminals
Condition Voltage (+)
(–)
ConnectorTe r m i n a l
(Wire color)
M75 6 (OR) GroundSelect
leverR-position Approx. 12V
Except R-
positionApprox. 0V
SKIA8942E