relay INFINITI QX56 2006 Factory Service Manual

TROUBLE DIAGNOSIS — GENERAL DESCRIPTIONACS-29
[ICC]
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Revision: November 2009 2006 QX56
BRAKE SW
[ON/OFF]××× Indicates [ON/OFF] status as judged from
ICC brake switch signal.
STOP LAMP SW
[ON/OFF] ×××
Indicates [ON/OFF] status as judged from
stop lamp switch signal.
RELEASE SW NO
[ON/OFF] ××Indicates [ON/OFF] status as judged from
release switch signal.
ON when brake is depressed.
OFF when brake is not depressed.
RELEASE SW NC
[ON/OFF] ××Indicates [ON/OFF] status as judged from
release switch signal.
OFF when brake is depressed.
ON when brake is not depressed.
IDLE SW
[ON/OFF] ××Indicates [ON/OFF] status of idle switch
read by ICC unit via CAN communication
(ECM transmits ON/OFF status via CAN
communication).
GEAR
[1, 2, 3, 4, 5] ××Indicates A/T gear position read by ICC unit
via CAN communication (TCM transmits
gear position via CAN communication).
BUZZER O/P
[ON/OFF] ×Indicates [ON/OFF] status of ICC warning
output.
ICC WARNING ×NOTE:
This item is displayed but cannot be moni-
tored.
VHCL SPD AT
[km/h] or [mph] ×Indicates vehicle speed calculated from A/T
vehicle speed sensor by ICC unit via CAN
communication (TCM transmits A/T vehicle
speed sensor signal via CAN communica-
tion).
PRESS SENS
[bar] ××× Indicates brake fluid pressure value calcu-
lated from signal voltage of pressure sen-
sor.
PRESS SENS 2
[bar] ××NOTE:
This item is displayed but cannot be moni-
tored.
D RANGE SW
[ON/OFF] ××Indicates [ON/OFF] status of
“D ” position
read by ICC unit via CAN communication
(TCM transmits ON/OFF condition of “ D”
position via CAN communication).
A/T OD OFF
[ON/OFF] ×
Indicates [ON/OFF] status of OD cancel
output under control.
NP RANGE SW
[ON/OFF] ××Indicates PNP switch signal read by ICC
unit via CAN communication. (TCM trans-
mits PNP switch signal via CAN communi-
cation)
DISTANCE ×NOTE:
This item is displayed but cannot be moni-
tored.
RELATIVE SPD ×NOTE:
This item is displayed but cannot be moni-
tored.
STP LMP DRIVE
[ON/OFF] ×× Indicates [ON/OFF] status of brake hold
relay drive output.
Monitored Item [unit] MAIN SIGNALS
ECU
INPUT
SIGNALS SELECTION
FROM MENU Description

ACS-36
[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: November 20092006 QX56
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMSPFP:00000
Diagnostic Trouble Code (DTC) ChartEKS00BLZ
×:Applicable
DTC No. CONSULT-II screen terms ICC sys-
tem
warning
lamp Fail-safe
Malfunctions detected where... Refer-
ence
page
Ve h ic le -
to-vehi-cle dis-
tance
control mode Conven-
tional
(fixed
speed) cruise
control mode Brake
assist
(with pre- view
function)
11 CONTROL UNIT ××××

ICC unit internal malfunctionACS-37
12 VDC CONTROL UNIT ××××

VDC malfunction

Brake booster signal harness is
open or shortedACS-37
20 CAN COMM CIRCUIT
××××
ICC unit detected CAN communi-
cation malfunctionACS-38
31 POWER SUPPLY CIR1
××××
ICC unit power supply voltage is
excessively low (less than 8V)ACS-38
34 POWER SUPPLY CIR2
××××
ICC unit power supply voltage is
excessively high.ACS-38
41 VHCL SPEED SE CIRC
××××

Wheel sensor malfunction

ABS actuator and electric unit
(control unit) malfunction

A/T vehicle speed sensor mal-
function

TCM malfunctionACS-39
43 VDC/TCS/ABS CIRC
××××
VDC/TCS/ABS system malfunc-
tionACS-39
45 BRAKE SW/ STOP L SW
××××

ICC brake switch or stop lamp
switch harness is open or shorted

ICC brake switch or stop lamp
switch is stuck to OFF

ICC brake switch or stop lamp
switch is stuck to ONACS-40
46 OPERATION SW CIRC
×××

ICC steering switch harness or
spiral cable is open or shorted

ICC steering switch malfunctionACS-41
74 LASER BEAM OFF CNTR
×××
Laser beam of ICC sensor is off
the aiming point ACS-42
90 STOP LAMP RLY FIX
×××
Normally open terminal of stop
lamp relay is stuck ACS-43
92 ECM CIRCUIT
××××

ECM malfunction

Accelerator pedal position sensor
malfunction

ICC unit malfunctionACS-47
96 NP RANGE
×××

Park/neutral position switch har-
ness is open or shorted

Park/neutral position switch mal-
function

TCM malfunctionACS-48
97 AT CIRCUIT
×××
TCM malfunctionACS-48

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMSACS-41
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Revision: November 2009 2006 QX56
6. CHECK ICC BRAKE HOLD RELAY
1. Turn ignition switch OFF.
2. Remove ICC brake hold relay.
3. Check continuity between ICC brake hold relay terminals.
OK or NG
OK >> GO TO 7.
NG >> Replace ICC brake hold relay. Erase DTC and perform ICC system running test. Refer to ACS-9, "
ICC System
Running Test" . Then perform self-diagnosis of ICC sys-
tem again.
7. CHECK ICC BRAKE HOLD RELAY CIRCUIT
1. Disconnect ICC unit and stop lamp switch connectors.
2. Check continuity between ICC unit harness connector B17 ter- minal 38 and ICC brake hold relay harness connector E134 ter-
minal 7.
3. Check continuity between ICC unit harness connector B17 ter- minal 38 and stop lamp switch harness connector E38 terminal
4.
OK or NG
OK >> Replace ICC unit. Refer to ACS-59, "ICC Unit" . Erase
DTC and perform ICC system running test. Refer to ACS-9, "
ICC System Running Test" . Then
perform self-diagnosis of ICC system again.
NG >>

Repair harness between ICC unit and ICC brake hold relay or stop lamp switch.

Erase DTC and perform ICC system running test. Refer to ACS-9, "ICC System Running Test"
. Then perform self-diagnosis of ICC system again.
DTC 46 OPERATION SW CIRCEKS00BM7
1. CHECK ECM CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect ECM connector and connect it securely again. Erase DTC, then perform self-diagnosis of ICC system again.
OK or NG
OK >>
Poor connector connection.

Check connector. Check connector housing for disconnected, loose, bent, and collapsed termi-
nals. If any malfunction is detected, repair as as necessary. Erase DTC and perform ICC sys-
tem running test. Refer to ACS-9, "
ICC System Running Test" . Then perform self-diagnosis of
ICC system again.
NG >> GO TO 2. 7 - 6 Continuity should not exist.
4 - 3 Continuity should exist.
SKIA6651E
Continuity should exist.
Continuity should exist.
WKIA3403E

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMSACS-43
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Revision: November 2009 2006 QX56
DTC 90 STOP LAMP RLY FIXEKS00BM9
1. CHECK ICC UNIT CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect and check ICC unit connector.
OK or NG
OK >> GO TO 2.
NG >>

Connector malfunction.

Erase DTC and perform ICC system running test. Refer to ACS-9, "ICC System Running Test"
. Then perform self-diagnosis of system.
2. CHECK STOP LAMP SWITCH AND ICC BRAKE SWITCH
With CONSULT-II
1. Connect ICC unit connector and turn ignition switch ON.
2. With data monitor, check that “STOP LAMP SW” and “BRAKE SW ” operate normally.
OK or NG
OK >> GO TO 11.
NG >>

BRAKE SW: GO TO 3.

STOP LAMP SW: GO TO 8.
3. CHECK AND ADJUST ICC BRAKE SWITCH
Check ICC brake switch for proper installation and adjust if necessary. Refer to BR-6, "
BRAKE PEDAL" .
OK or NG
OK >> GO TO 4.
NG >> After adjustment, erase DTC and perform ICC system running test. Refer to ACS-9, "
ICC System
Running Test" . Then perform self-diagnosis of ICC system again.
4. CHECK ICC BRAKE SWITCH
Check ICC brake switch. Refer to ACS-58, "
ICC Brake Switch and Stop Lamp Switch" .
OK or NG
OK >> GO TO 5.
NG >> Replace ICC brake switch. Erase DTC and perform ICC system running test. Refer to ACS-9,
"ICC System Running Test" . Then perform self-diagnosis of ICC system again.
5. CHECK ICC BRAKE HOLD RELAY
Disconnect ICC brake hold relay and check continuity between ICC
brake hold relay terminal 4 and terminal 3.
OK or NG
OK >> GO TO 6.
NG >> Replace ICC brake hold relay. Erase DTC and perform ICC system running test. Refer to ACS-9, "
ICC System
Running Test" . Then perform self-diagnosis of ICC sys-
tem again.
Continuity should exist.
SKIA6658E

ACS-44
[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: November 20092006 QX56
6. CHECK HARNESS THROUGH ICC BRAKE HOLD RELAY, ICC BRAKE SWITCH, ICC UNIT
1. Disconnect ECM and ICC unit harness connectors.
2. Check continuity between ICC brake hold relay harness connec- tor E134 terminal 4 and ICC unit harness connector B17 termi-
nal 29.
3. Check continuity between ICC unit harness connector B17 ter- minal 29 and ground.
OK or NG
OK >> GO TO 7.
NG >>

Repair harness between ICC brake hold relay and
ICC brake switch.

Repair harness between ICC brake switch and ICC unit.

Erase DTC and perform ICC system running test. Refer to ACS-9, "ICC System Running Test"
. Then perform self-diagnosis of ICC system again.
7. CHECK ICC BRAKE HOLD RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between ICC brake hold relay harness connector E134 terminal 3 and ground.
OK or NG
OK >> Replace ICC unit. Refer to ACS-59, "ICC Unit" . Erase
DTC and perform ICC system running test. Refer to
ACS-9, "
ICC System Running Test" . Then perform self-
diagnosis of ICC system again.
NG >>

Check fuse or ICC brake hold relay power supply sys-
tem harness.

Erase DTC and perform ICC system running test. Refer to ACS-9, "ICC System Running Test"
. Then perform self-diagnosis of ICC system again.
8. CHECK STOP LAMP SWITCH
1. Turn ignition switch OFF.
2. Check stop lamp switch. Refer to ACS-58, "
ICC Brake Switch and Stop Lamp Switch" .
OK or NG
OK >> GO TO 9.
NG >> Replace stop lamp switch. Erase DTC and perform ICC system running test. Refer to ACS-9,
"ICC System Running Test" . Then perform self-diagnosis of ICC system again.
9. CHECK ICC BRAKE HOLD RELAY CIRCUIT
1. Disconnect stop lamp switch connector.
2. When brake pedal is not depressed, make sure that stop lamp does not illuminate.
OK or NG
OK >> Replace ICC unit. Refer to ACS-59, "ICC Unit" . Erase DTC and perform ICC system running test.
Refer to ACS-9, "
ICC System Running Test" . Then perform self-diagnosis of ICC system again.
NG >> GO TO 10. Continuity should exist.
Continuity should not exist.
WKIA1929E
Battery voltage should exist
WKIA3618E

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMSACS-45
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Revision: November 2009 2006 QX56
10. CHECK ICC BRAKE HOLD RELAY
1. Disconnect ICC brake hold relay.
2. Check continuity between ICC brake hold relay E134 terminal 7 and terminal 6.
OK or NG
OK >> Replace ICC unit. Refer to ACS-59, "ICC Unit" . Erase
DTC and perform ICC system running test. Refer to
ACS-9, "
ICC System Running Test" . Then perform self-
diagnosis of ICC system again.
NG >> Replace ICC brake hold relay. Erase DTC and perform
ICC system running test. Refer to ACS-9, "
ICC System
Running Test" . Then perform self-diagnosis of ICC system again.
11 . CHECK HARNESS THROUGH ICC UNIT, ICC BRAKE HOLD RELAY, AND GROUND
1. Disconnect ICC unit and ICC brake hold relay harness connec- tors.
2. Check continuity between ICC unit harness connector B17 ter- minal 47 and ICC brake hold relay harness connector E134 ter-
minal 1.
3. Check continuity between ICC unit harness connector B17 ter- minal 47 and ground.
4. Check continuity between ICC brake hold relay harness connec- tor E134 terminal 2 and ground.
OK or NG
OK >> GO TO 12.
NG >>

Repair harness through ICC unit and ICC brake hold
relay, or between ICC brake hold relay and ground.

Erase DTC and perform ICC system running test.
Refer to ACS-9, "
ICC System Running Test" . Then
perform self-diagnosis of ICC system again.
12. CHECK ICC BRAKE HOLD RELAY
Check continuity between ICC brake hold relay terminal 1 and termi-
nal 2.
OK or NG
OK >> GO TO 13.
NG >> Replace ICC brake hold relay. Erase DTC and perform ICC system running test. Refer to ACS-9, "
ICC System
Running Test" . Then perform self-diagnosis of ICC sys-
tem again.
Continuity should not exist.
SKIA6659E
47 - 1
Continuity should exist.
47 - Ground Continuity should not exist.
SKIA6660E
Continuity should exist.
SKIA6661E
Continuity should exist
(minimal resistance through coil will exist)
SKIA6662E

ACS-46
[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: November 20092006 QX56
13. CHECK ICC UNIT STANDARD VOLTAGE
With CONSULT-II
1. Connect connectors of ICC unit and stop lamp switch.
2. While performing active test (STOP LAMP: STP LMP DRIVE ON) with CONSULT-II, check voltage between ICC unit harness
connector B17 terminal 47 and ground.
OK or NG
OK >> GO TO 14.
NG >> Replace ICC unit. Refer to ACS-59, "
ICC Unit" . Erase
DTC and perform ICC system running test. Refer to
ACS-9, "
ICC System Running Test" . Then perform self-
diagnosis of ICC system again.
14. CHECK ICC BRAKE HOLD RELAY POWER SUPPLY CIRCUIT
Check voltage between ICC brake hold relay harness connector
E134 terminal 6 and ground.
OK or NG
OK >> GO TO 15.
NG >>

Check fuse or ICC brake hold relay power supply har-
ness.

Erase DTC and perform ICC system running test.
Refer to ACS-9, "
ICC System Running Test" . Then
perform self-diagnosis of ICC system again.
15. CHECK HARNESS BETWEEN ICC BRAKE HOLD RELAY AND ICC UNIT
1. Turn ignition switch OFF.
2. Disconnect ICC unit harness connectors.
3. Check continuity between ICC brake hold relay harness connec- tor E134 terminal 7 and ICC unit harness connector B17 termi-
nal 38.
4. Check continuity between ICC unit harness connector B17 ter- minal 38 (R/G) and ground.
OK or NG
OK >> GO TO 16.
NG >>

Repair harness between ICC brake hold relay and ICC unit or between ICC brake hold relay
and stop lamp switch.

Erase DTC and perform ICC system running test. Refer to ACS-9, "ICC System Running Test"
. Then perform self-diagnosis of ICC system again.
47 - Ground
Battery voltage should exist
(during active test)
SKIA3075E
6 - Ground Battery voltage should exist
WKIA1931E
7 - 38 Continuity should exist.
38 - Ground Continuity should not exist.
WKIA1932E

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMSACS-47
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Revision: November 2009 2006 QX56
16. CHECK ICC BRAKE HOLD RELAY
With CONSULT-II
1. Connect ICC unit and ICC brake hold relay harness connectors.
2. Disconnect stop lamp switch connector.
3. Perform active test (STOP LAMP) with CONSULT-II, and make sure that stop lamps are illuminated.
OK or NG
OK >> GO TO 17.
NG >> Replace ICC brake hold relay. Erase DTC and perform ICC system running test. Refer to ACS-9,
"ICC System Running Test" . Then perform self-diagnosis of ICC system again.
17. CHECK ICC UNIT STANDARD VOLTAGE
With CONSULT-II
1. Connect stop lamp switch connector.
2. While performing active test (STOP LAMP: STP LMP DRIVE ON) with CONSULT-II, check voltage between ICC unit harness
connector B17 terminal 29 and ground.
OK or NG
OK >> Replace ICC unit. Refer to ACS-59, "ICC Unit" . Erase
DTC and perform ICC system running test. Refer to
ACS-9, "
ICC System Running Test" . Then perform self-
diagnosis of ICC system again.
NG >> Replace stop lamp switch. Erase DTC and perform ICC system running test. Refer to ACS-9, "
ICC System Running Test" . Then perform self-diagnosis of
ICC system again.
DTC 92 ECM CIRCUITEKS00BMA
1. DIAGNOSIS CHECK 1
With CONSULT-II
Perform self-diagnosis with CONSULT-II. Is “CAN COMM CIRCUIT” indicated?
YES or NO
YES >> Repair or replace as necessary. Erase DTC and perform ICC system running test. Refer to ACS-
9, "ICC System Running Test" . Then perform self-diagnosis of ICC system again.
NO >> GO TO 2.
2. DIAGNOSIS CHECK 2
With CONSULT-II
Perform ECM self-diagnosis with CONSULT-II. Is malfunction indicated?
YES or NO
YES >> Repair or replace as necessary. Erase DTC and perform ICC system running test. Refer to ACS-
9, "ICC System Running Test" . Then perform self-diagnosis of ICC system again.
NO >> Replace ICC unit. Refer to ACS-59, "
ICC Unit" . Erase DTC and perform ICC system running test.
Refer to ACS-9, "
ICC System Running Test" . Then perform self-diagnosis of ICC system again.
29 - Ground Approx. 0V (during active test)
SKIA1200E

INDEX FOR DTCAT-5
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Revision: November 2009 2006 QX56
INDEX FOR DTCPFP:00024
Alphabetical Index ECS00CDH
NOTE:
If DTC U1000 is displayed with other DTC, first perform the trouble diagnosis for DTC U1000. Refer to
AT- 9 6 , "
DTC U1000 CAN COMMUNICATION LINE" .
*1: These numbers are prescribed by SAE J2012.
*2: These malfunctions cannot be displayed MIL if another malfunction is assigned to MIL.Items
(CONSULT- II screen terms) DTC
Reference page
OBD- II Except OBD- II
CONSULT- II GST (*1) CONSULT- II only “ A/T”
A/T 1ST E/BRAKING —P1731AT- 1 3 7
ATF PRES SW 1/CIRC —P1841AT- 1 5 9
ATF PRES SW 3/CIRC —P1843AT- 1 6 1
ATF PRES SW 5/CIRC —P1845AT- 1 6 3
ATF PRES SW 6/CIRC —P1846AT- 1 6 5
A/T INTERLOCK P1730P1730AT- 1 3 4
A/T TCC S/V FNCTN P0744 P0744 AT- 1 2 0
ATF TEMP SEN/CIRC P0710P1710AT- 1 2 7
CAN COMM CIRCUIT U1000U1000AT- 9 6
D/C SOLENOID/CIRC P1762P1762AT- 1 4 7
D/C SOLENOID FNCTN P1764 (*2 )P1764 AT- 1 4 9
ENGINE SPEED SIG —P0725AT- 11 6
FR/B SOLENOID/CIRC P1757P1757AT- 1 4 3
FR/B SOLENOID FNCT P1759 P1759 AT- 1 4 5
HLR/C SOL/CIRC P1767P1767AT- 1 5 1
HLR/C SOL FNCTN P1769 (*2 ) P1769 AT- 1 5 3
I/C SOLENOID/CIRC P1752P1752AT- 1 3 9
I/C SOLENOID FNCTN P1754 (*2 ) P1754 AT- 1 4 1
L/PRESS SOL/CIRC P0745P0745AT- 1 2 2
LC/B SOLENOID/CIRC P1772P1772AT- 1 5 5
LC/B SOLENOID FNCT P1774 P1774 AT- 1 5 7
PNP SW/CIRC P0705P0705AT- 1 0 5
STARTER RELAY/CIRC —P0615AT- 1 0 0
TCC SOLENOID/CIRC P0740P0740AT- 11 8
TCM P0700P0700AT- 1 0 4
TP SEN/CIRC A/T —P1705AT- 1 2 4
TURBINE REV S/CIRC P0717P0717AT- 1 0 9
VEH SPD SE/CIR·MTR —P1721AT- 1 3 2
VEH SPD SEN/CIR AT P0720P0720AT- 111

AT-6
INDEX FOR DTC
Revision: November 20092006 QX56
DTC No. Index ECS00CDI
NOTE:
If DTC U1000 is displayed with other DTC, first perform the trouble diagnosis for DTC U1000. Refer to
AT- 9 6 , "
DTC U1000 CAN COMMUNICATION LINE" .
*1: These numbers are prescribed by SAE J2012.
*2: These malfunctions cannot be displayed MIL if another malfunction is assigned to MIL.DTC
Items
(CONSULT- II screen terms) Reference page
OBD- II
Except OBD- II
CONSULT- II GST (*1) C O N S U LT- I I
only “A/T ”
— P0615 STARTER RELAY/CIRC AT- 1 0 0
P0700P0700 TCM AT- 1 0 4
P0705P0705 PNP SW/CIRC AT- 1 0 5
P0710P1710 ATF TEMP SEN/CIRC AT- 1 2 7
P0717P0717 TURBINE REV S/CIRC AT- 1 0 9
P0720P0720 VEH SPD SEN/CIR AT AT- 111
—P0725 ENGINE SPEED SIG AT- 11 6
P0740P0740 TCC SOLENOID/CIRC AT- 11 8
P0744 P0744 A/T TCC S/V FNCTN AT- 1 2 0
P0745P0745 L/PRESS SOL/CIRC AT- 1 2 2
—P1705 TP SEN/CIRC A/T AT- 1 2 4
—P1721 VEH SPD SE/CIR· MTR AT- 1 3 2
P1730P1730 A/T INTERLOCK AT- 1 3 4
— P1731 A/T 1ST E/BRAKING AT- 1 3 7
P1752P1752 I/C SOLENOID/CIRC AT- 1 3 9
P1754 (*2 ) P1754 I/C SOLENOID FNCTN AT- 1 4 1
P1757P1757 FR/B SOLENOID/CIRC AT- 1 4 3
P1759 (*2 ) P1759 FR/B SOLENOID FNCT AT- 1 4 5
P1762P1762 D/C SOLENOID/CIRC AT- 1 4 7
P1764 (*2 )P1764 D/C SOLENOID FNCTN AT- 1 4 9
P1767P1767 HLR/C SOL/CIRC AT- 1 5 1
P1769 P1769 HLR/C SOL FNCTN AT- 1 5 3
P1772P1772 LC/B SOLENOID/CIRC AT- 1 5 5
P1774 P1774 LC/B SOLENOID FNCT AT- 1 5 7
—P1841 ATF PRES SW 1/CIRC AT- 1 5 9
—P1843 ATF PRES SW 3/CIRC AT- 1 6 1
—P1845 ATF PRES SW 5/CIRC AT- 1 6 3
—P1846 ATF PRES SW 6/CIRC AT- 1 6 5
U1000U1000 CAN COMM CIRCUIT AT- 9 6