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![INFINITI QX56 2006 Factory Service Manual LAN-124
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Inspection Between TCM and Driver Seat Control Unit CircuitUKS004TC
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disco INFINITI QX56 2006 Factory Service Manual LAN-124
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TROUBLE DIAGNOSIS FOR SYSTEM
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Inspection Between TCM and Driver Seat Control Unit CircuitUKS004TC
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disco](/manual-img/42/57028/w960_57028-2392.png)
LAN-124
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TROUBLE DIAGNOSIS FOR SYSTEM
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Inspection Between TCM and Driver Seat Control Unit CircuitUKS004TC
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check following terminals and connectors for damage, bend and loose connection (connector side and harness side).
–Harness connector F14
–Harness connector E5
–Harness connector E34
–Harness connector B40
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect A/T assembly connector and harness connector F14.
2. Check continuity between A/T assembly harness connector (A) and harness connector (B).
OK or NG
OK >> GO TO 3.
NG >> Repair harness.
3. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect harness connector E34.
2. Check continuity between harness connector (A) and harness connector (B).
OK or NG
OK >> GO TO 4.
NG >> Repair harness.
AB Continuity
Connector Terminal Connector Terminal
F9 3
F14 5 Yes
81 5Yes
PKIC3825E
AB
Continuity
Connector Terminal Connector Terminal
E5 5
E34 24 Yes
15 23Yes
PKIC3826E
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4. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect harness connector B37.
2. Check continuity betwee INFINITI QX56 2006 Factory Service Manual TROUBLE DIAGNOSIS FOR SYSTEMLAN-125
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4. CHECK HARNESS FOR OPEN CIRCUIT
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2. Check continuity betwee](/manual-img/42/57028/w960_57028-2393.png)
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4. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect harness connector B37.
2. Check continuity between harness connector (A) and harness connector (B).
OK or NG
OK >> Connect all the connectors and diagnose again. Refer to LAN-5, "
TROUBLE DIAGNOSES WORK FLOW" .
NG >> Repair harness.
Inspection Between ICC Sensor and ICC Unit CircuitUKS004TD
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check following terminals and connectors for damage, bend and loose connection (connector side and harness side).
–Harness connector E34
–Harness connector B40
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect ICC sensor connector and harness connector E34.
2. Check continuity between ICC sensor harness connector (A) and harness connector (B).
OK or NG
OK >> GO TO 3.
NG >> Repair harness.
AB Continuity
Connector Terminal Connector Terminal
B40 24
B37 15 Yes
23 14Yes
PKIC3828E
AB
Continuity
Connector Terminal Connector Terminal
E42 2
E34 24 Yes
32 3Yes
PKIC3837E
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![INFINITI QX56 2006 Factory Service Manual LAN-126
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TROUBLE DIAGNOSIS FOR SYSTEM
Revision: November 20092006 QX56
3. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect ICC unit connector.
2. Check continuity between harness connector (A) and IC INFINITI QX56 2006 Factory Service Manual LAN-126
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3. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect ICC unit connector.
2. Check continuity between harness connector (A) and IC](/manual-img/42/57028/w960_57028-2394.png)
LAN-126
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3. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect ICC unit connector.
2. Check continuity between harness connector (A) and ICC unit harness connector (B).
OK or NG
OK >> Connect all the connectors and diagnose again. Refer to LAN-5, "
TROUBLE DIAGNOSES WORK FLOW" .
NG >> Repair harness.
Inspection Between ICC Unit and Driver Seat Control Unit CircuitUKS004TE
1. CHECK HARNESS FOR OPEN CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Disconnect ICC unit connector and harness connector B37.
4. Check continuity between ICC unit harness connector (A) and harness connector (B).
OK or NG
OK >> Connect all the connectors and diagnose again. Refer to LAN-5, "
TROUBLE DIAGNOSES WORK FLOW" .
NG >> Repair harness.
Inspection Between Driver Seat Control Unit and Data Link Connector CircuitUKS004TG
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check following terminals and connectors for damage, bend and loose connection (connector side and harness side).
–Harness connector B69
–Harness connector M40
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
AB Continuity
Connector Terminal Connector Terminal
B40 24
B13 14 Yes
23 5Yes
PKIC3838E
AB
Continuity
Connector Terminal Connector Terminal
B13 14
B37 15 Yes
51 4Yes
PKIC3839E
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2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect harness connector B37 and harness connector B69.
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2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect harness connector B37 and harness connector B69.
2. Check continuity between harness connector (A) and harness connector (B).
OK or NG
OK >> GO TO 3.
NG >> Repair harness.
3. CHECK HARNESS FOR OPEN CIRCUIT
Check continuity between harness connector (A) and data link con-
nector (B).
OK or NG
OK >> Connect all the connectors and diagnose again. Refer to LAN-5, "
TROUBLE DIAGNOSES WORK FLOW" .
NG >> Repair harness.
Inspection Between Data Link Connector and ABS Actuator and Electric Unit
(Control Unit) Circuit
UKS004TH
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check following terminals and connectors for damage, bend and loose connection (connector side and harness side).
–Harness connector M31
–Harness connector E152
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
AB Continuity
Connector Terminal Connector Terminal
B37 15
B69 51J Yes
14 52JYes
PKIC3832E
AB
Continuity
Connector Terminal Connector Terminal
M40 51J
M22 6 Yes
52J 14Yes
PKIC3830E
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![INFINITI QX56 2006 Factory Service Manual LAN-128
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2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect harness connector M31.
2. Check continuity between data link connector (A) a INFINITI QX56 2006 Factory Service Manual LAN-128
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2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect harness connector M31.
2. Check continuity between data link connector (A) a](/manual-img/42/57028/w960_57028-2396.png)
LAN-128
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2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect harness connector M31.
2. Check continuity between data link connector (A) and harness connector (B).
OK or NG
OK >> GO TO 3.
NG >> Repair harness.
3. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect ABS actuator and electric unit (control unit) connector.
2. Check continuity between harness connector (A) and ABS actu- ator and electric unit (control unit) connector (B).
OK or NG
OK >> Connect all the connectors and diagnose again. Refer to LAN-5, "
TROUBLE DIAGNOSES WORK FLOW" .
NG >> Repair harness.
ECM Circuit InspectionUKS004TI
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check following terminals and connectors for damage, bend and loose connection (control module side and harness side).
–ECM connector
–Harness connector E5
–Harness connector F14
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
AB Continuity
Connector Terminal Connector Terminal
M22 6
M31 31G
Yes
14 42GYes
PKIC3833E
AB
Continuity
Connector Terminal Connector Terminal
E152 31G
E125 11
Ye s
42G 15Yes
PKIC3834E
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2. Check resistance between ECM ha](/manual-img/42/57028/w960_57028-2397.png)
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2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect ECM connector.
2. Check resistance between ECM harness connector terminals.
OK or NG
OK >> Replace ECM.
NG >> Repair harness between ECM and A/T assembly.
TCM Circuit InspectionUKS004TJ
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check terminals and connector of A/T assembly for damage, bend and loose connection (control module side and harness side).
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect A/T assembly connector.
2. Check resistance between A/T assembly harness connector ter- minals.
OK or NG
OK >> Replace control valve with TCM.
NG >> Repair harness between A/T assembly and harness connector F14.
ICC Sensor Circuit InspectionUKS004TX
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check terminals and connector of ICC sensor for damage, bend and loose connection (sensor side and harness side).
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
ECM connector TerminalResistance
(Approx.)
E16 9486 108 – 132 Ω
PKIA9860E
A/T assembly
connector TerminalResistance
(Approx.)
F9 38 54 – 66 Ω
SKIA6866E
Page 2399 of 3383
![INFINITI QX56 2006 Factory Service Manual LAN-130
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TROUBLE DIAGNOSIS FOR SYSTEM
Revision: November 20092006 QX56
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect ICC sensor connector.
2. Check resistance between ICC sensor harness connect INFINITI QX56 2006 Factory Service Manual LAN-130
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2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect ICC sensor connector.
2. Check resistance between ICC sensor harness connect](/manual-img/42/57028/w960_57028-2398.png)
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2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect ICC sensor connector.
2. Check resistance between ICC sensor harness connector termi- nals.
OK or NG
OK >> Replace ICC sensor.
NG >> Repair harness between ICC sensor and harness con- nector E34.
ICC Unit Circuit InspectionUKS004TY
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check terminals and connector of ICC unit for damage, bend and loose connection (unit side and harness side).
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect ICC unit connector.
2. Check resistance between ICC unit harness connector termi- nals.
OK or NG
OK >> Replace ICC unit.
NG >> Repair harness between ICC unit and harness connec- tor B34.
Driver Seat Control Unit Circuit InspectionUKS004TL
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check following terminals and connectors for damage, bend and loose connection (control unit side and harness side).
–Driver seat control unit connector
–Harness connector P1
–Harness connector B37
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
ICC sensor connector TerminalResistance
(Approx.)
E42 23 54 – 66 Ω
PKIC3840E
ICC unit
connector TerminalResistance
(Approx.)
B13 145 54 – 66 Ω
PKIC3841E
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1. Disconnect driver seat control unit connector.
2. Check resi INFINITI QX56 2006 Factory Service Manual TROUBLE DIAGNOSIS FOR SYSTEMLAN-131
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2. Check resi](/manual-img/42/57028/w960_57028-2399.png)
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2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect driver seat control unit connector.
2. Check resistance between driver seat control unit harness con- nector terminals.
OK or NG
OK >> Replace driver seat control unit.
NG >> Repair harness between driver seat control unit and har- ness connector B69.
Combination Meter Circuit InspectionUKS004TM
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check terminals and connector of combination meter for damage, bend and loose connection (meter side and harness side).
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect combination meter connector.
2. Check resistance between combination meter harness connec- tor terminals.
OK or NG
OK >> Replace combination meter.
NG >> Repair harness between combination meter and data link connector.
Display Control Unit Circuit InspectionUKS004TN
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check terminals and connector of display control unit for damage, bend and loose connection (control unit side and harness side).
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
Driver seat control unit connector TerminalResistance
(Approx.)
P2 319 54 – 66 Ω
PKIA6842E
Combination
meter connector TerminalResistance
(Approx.)
M24 1112 54 – 66 Ω
PKIA6837E