Page 705 of 3419

AV-116
NAVIGATION SYSTEM
Revision: October 20052005 QX56
Power Supply and Ground Circuit Check for NAVI Control UnitEKS00BJV
1. CHECK FUSE
Make sure the following fuses of the NAVI control unit 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-
4, "POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Disconnect NAVI control unit connector B151.
2. Check voltage between connector terminals and ground as fol-
lows.
OK or NG
OK >> GO TO 3.
NG >> Check harness for open between NAVI control unit and fuse.
3. CHECK GROUND CIRCUIT
Check continuity between the following NAVI control unit connector
terminals and ground.
OK or NG
OK >> Inspection End.
NG >> Repair or replace harness.
Te r m i n a l s
Power source Fuse No.
Connector Terminal (Wire color)
B1512 (Y), 3 (Y) Battery power 31
6 (O) ACC power 4
Terminals Ignition switch position
(+)
(–) OFF ACC ON
ConnectorTerminal
(Wire color)
B1512 (Y), 3 (Y)
GroundBattery
voltageBattery
voltageBattery
voltage
6 (O) 0VBattery
voltageBattery
voltage
WKIA1372E
Te r m i n a l s
Ignition switch Continuity
Connector Terminal (Wire color) —
B151 1 (B), 4 (B) Ground OFF Yes
SKIA4291E
Page 706 of 3419

NAVIGATION SYSTEM
AV-117
C
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E
F
G
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J
L
MA
B
AV
Revision: October 20052005 QX56
Power Supply and Ground Circuit Check for Display Control UnitEKS00BJW
1. CHECK FUSE
Make sure 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 cause of malfunction before installing new fuse. Refer to PG-
4, "POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Disconnect display control unit connector M94.
2. Check voltage between connector terminals and ground as fol-
lows.
OK or NG
OK >> GO TO 3.
NG >> Check harness for open or short between display control unit and fuse.
3. CHECK GROUND CIRCUIT
Check continuity between the following display control unit connec-
tor terminals and ground.
OK or NG
OK >> Inspection End.
NG >> Repair or replace harness.
Terminals
Power source Fuse No.
Connector Terminal (Wire color)
M941 (Y) Battery power 31
10 (O) ACC power 4
Terminals Ignition switch position
(+)
(–) OFF ACC ON
ConnectorTe r m i n a l
(Wire color)
M941 (Y)
GroundBattery
voltageBattery
voltageBattery
voltage
10 (O) 0VBattery
voltageBattery
voltage
WKIA1373E
Te r m i n a l s
Ignition switch Continuity
Connector Terminal (Wire color) —
M943 (B)
Ground OFF Yes
13 (B)
WKIA2680E
Page 707 of 3419

AV-118
NAVIGATION SYSTEM
Revision: October 20052005 QX56
Power Supply and Ground Circuit Check for Display UnitEKS00BJX
1. CHECK POWER SUPPLY AND GROUND CIRCUIT FOR DISPLAY CONTROL UNIT
1. Check power supply and ground circuit for display control unit. Refer to AV- 11 7 , "
Power Supply and
Ground Circuit Check for Display Control Unit" .
OK or NG
OK >> GO TO 2.
NG >> Repair malfunctioning part.
2. CHECK POWER SUPPLY CIRCUIT FOR DISPLAY UNIT
1. Disconnect display unit connector.
2. Turn ignition switch ON.
3. Check voltage between display unit harness connector M93 ter-
minals 2 (L/W), 3 (L/R) and ground.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3. CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect display unit connector M93 and display control unit connector M94.
3. Check continuity between display control unit harness connector M94 terminals 2 (L/W), 4 (L/R) and dis-
play unit harness connector M93 terminals 2 (L/W), 3 (L/R).
4. Check continuity between display unit and ground.
OK or NG
OK >> Replace display control unit. Refer to AV- 1 5 8 , "Removal and Installation of Display Control Unit" .
NG >> Repair harness.Approx. 9V
WKIA1227E
Te r m i n a l s
Continuity Display control unit Display unit
ConnectorTerminal
(Wire color)ConnectorTe r m i n a l
(Wire color)
M942 (L/W)
M932 (L/W)
Ye s
4 (L/R) 3 (L/R)
Te r m i n a l s
Continuity Display unit
—
Connector Terminal (Wire color)
M932 (L/W)
Ground No
3 (L/R)
WKIA1229E
Page 708 of 3419
NAVIGATION SYSTEM
AV-119
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F
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L
MA
B
AV
Revision: October 20052005 QX56
4. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between display unit harness connector M93
terminals 13 (P), 14 (P/L) and ground.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
5. CHECK HARNESS
1. Disconnect display control unit connector M94.
2. Check continuity between display unit harness connector M93
terminals 13 (P), 14 (P/L) and display control unit harness con-
nector M94 terminals 5 (P), 7 (P/L).
OK or NG
OK >> Replace display control unit. Refer to AV-158, "Removal
and Installation of Display Unit" .
NG >> Repair harness.
6. CHECK GROUND CIRCUIT
Check continuity between display unit and ground as follows.
1.
OK or NG
OK >> Inspection End.
NG >> Repair harness.Continuity should exist.
WKIA2079E
Continuity should exist.
WKIA2080E
Te r m i n a l s
Ignition
switchContinuity
Connector Terminal (Wire color) —
M93 1 (B) Ground OFF Yes
WKIA1228E
Page 709 of 3419

AV-120
NAVIGATION SYSTEM
Revision: October 20052005 QX56
Power Supply and Ground Circuit Check for AV SwitchEKS00BJY
1. CHECK FUSE
Make sure the following fuses of the AV switch 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-
4, "POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Disconnect AV switch connector.
2. Check voltage between connector terminals and ground as fol-
lows.
OK or NG
OK >> GO TO 3.
NG >> Check harness for open between AV switch and fuse.
3. CHECK GROUND CIRCUIT
Check continuity between AV switch and ground as follows.
OK or NG
OK >> Inspection End.
NG >> Repair or replace harness.
Te r m i n a l s
Power source Fuse No.
Connector Terminal (Wire color)
M981 (Y) Battery power 31
2 (V) ACC power 4
Terminals Ignition switch position
(+)
(–) OFF ACC ON
ConnectorTe r m i n a l
(Wire color)
M981 (Y)
GroundBattery
voltageBattery
voltageBattery
voltage
2 (V) 0VBattery
voltageBattery
voltage
WKIA1767E
Te r m i n a l s
Ignition switch Continuity
Connector Terminal (Wire color) —
M98 5 (B) Ground OFF Yes
WKIA1768E
Page 710 of 3419

NAVIGATION SYSTEM
AV-121
C
D
E
F
G
H
I
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L
MA
B
AV
Revision: October 20052005 QX56
Vehicle Speed Signal Check for NAVI Control UnitEKS00BJZ
1. CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect NAVI control unit connector B152, combination meter connector M24 and display control unit
connector M94.
3. Check continuity between NAVI control unit harness connector
B152 terminal 28 (W/R) and combination meter harness con-
nector M24 terminal 29 (W/R).
4. Check continuity between NAVI control unit harness connector
B152 terminal 28 (W/R) and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair harness.
2. CHECK 1: VEHICLE SPEED SIGNAL
1. Connect NAVI control unit connector.
2. Turn ignition switch ON.
3. Check voltage between NAVI control unit harness connector
B152 terminal 28 (W/R) and ground.
OK or NG
OK >> GO TO 3.
NG >> Replace NAVI control unit. Refer to AV-157, "
Removal
and Installation of NAVI Control Unit" .
3. CHECK 2: VEHICLE SPEED SIGNAL
1. Connect combination meter connector and display control unit connector.
2. Drive vehicle at a constant speed.
3. Check signal between NAVI control unit harness connector
B152 terminal 28 (W/R) and ground with CONSULT-ll or oscillo-
scope.
OK or NG
OK >> Replace NAVI control unit. Refer to AV-157, "Removal
and Installation of NAVI Control Unit" .
NG >> Check combination meter system. Refer to DI-19, "
Veh i-
cle Speed Signal Inspection" . Continuity should exist.
Continuity should not exist.
WKIA1769E
Approx. 3.5V or more
SKIA4295E
28 (W/R) – Ground : Refer to AV-90, "Terminals
and Reference Value for NAVI
Control unit" .
SKIA4615E
Page 711 of 3419

AV-122
NAVIGATION SYSTEM
Revision: October 20052005 QX56
Vehicle Speed Signal Check for Display Control UnitEKS00BK0
1. CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect display control unit connector M94, combination meter connector M24 and NAVI control unit
connector B152.
3. Check continuity between display control unit harness connector
M94 terminal 16 (W/R) and combination meter harness connec-
tor M24 terminal 29 (W/R).
4. Check continuity between display control unit harness connector
M94 terminal 16 (W/R) and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair harness.
2. CHECK 1: VEHICLE SPEED SIGNAL
1. Connect display control unit connector.
2. Turn ignition switch ON.
3. Check voltage between display control unit harness connector
M94 terminal 16 (W/R) and ground.
OK or NG
OK >> GO TO 3.
NG >> Replace display control unit. Refer to AV- 1 5 8 , "
Removal
and Installation of Display Control Unit" .
3. CHECK 2: VEHICLE SPEED SIGNAL
1. Connect combination meter connector and NAVI control unit connector.
2. Drive vehicle at a constant speed.
3. Check signal between display control unit harness connector
M94 terminal 16 (W/R) and ground with CONSULT-ll or oscillo-
scope.
OK or NG
OK >> Replace display control unit. Refer to AV- 1 5 8 , "Removal
and Installation of Display Control Unit" .
NG >> Check combination meter system. Refer to DI-19, "
Vehi-
cle Speed Signal Inspection" . Continuity should exist.
Continuity should not exist.
WKIA1506E
Approx. 3.5V or more
SKIA4297E
16 (W/R) – Ground : Refer to AV- 9 2 , "Terminals
and Reference Value for Dis-
play Control unit" .
SKIA4616E
Page 712 of 3419

NAVIGATION SYSTEM
AV-123
C
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L
MA
B
AV
Revision: October 20052005 QX56
Illumination Signal Check for NAVI Control UnitEKS00BK1
1. CHECK ILLUMINATION SIGNAL
1. Turn the ignition switch ON.
2. Check voltage between NAVI control unit and ground.
OK or NG
OK >> Replace NAVI control unit. Refer to AV-157, "Removal
and Installation of NAVI Control Unit" .
NG >> Check harness for open or short between NAVI control unit and IPDM E/R.
Illumination Signal Check for Display Control Unit EKS00BK2
1. CHECK ILLUMINATION SIGNAL
1. Turn ignition switch ON.
2. Check voltage between display control unit and ground.
OK or NG
OK >> Replace display control unit. Refer to AV-158, "Removal
and Installation of Display Control Unit" .
NG >> Check harness for open or short between display control unit and IPDM E/R.
Ignition Signal Check for NAVI Control UnitEKS00BK3
1. CHECK IGNITION SIGNAL
1. Disconnect NAVI control unit connector B152.
2. Turn ignition switch ON.
3. Check voltage between NAVI control unit harness connector
B152 terminal 26 (G/R) and ground.
OK or NG
OK >> Replace NAVI control unit. Refer to AV-157, "Removal
and Installation of NAVI Control Unit" .
NG >> Check harness for open or short between NAVI control
unit and fuse.
Te r m i n a l s
Lighting switch position
(+)
(–)
ConnectorTe r m i n a l
(Wire color)1st or 2nd
positionOFF
B152 25 (R/L) GroundBattery
voltageApprox. 0V
SKIA4298E
Te r m i n a l s
Lighting switch position
(+)
(–)
ConnectorTe r m i n a l
(Wire color)1st or 2nd
positionOFF
M94 14 (R/L) GroundBattery
voltageApprox. 0V
SKIA4299E
Battery voltage should exist.
SKIA4300E