relay INFINITI QX56 2004 Factory Service Manual

ACS-30
[ICC]
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
Revision: August 20072004 QX56
ACTIVE TEST
CAUTION:
Do not perform the active test while driving. Active test cannot be started while ICC system warning
indicator is illuminated.
Active Test
1. Touch “ACTIVE TEST” on "SELECT DIAG MODE" screen.
2. Touch any of “ICC BUZZER 1”, “METER LAMP”, “STOP LAMP”
and “BOOSTER SOL/V 3” on "SELECT TEST ITEM" screen.
3. Touch “START”.
4. Active test screen will be shown.
GEAR
[1, 2, 3, 4, 5]××Indicates AT 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 monitored.
VHCL SPD AT
[km/h] or [mph]
×Indicates vehicle speed calculated from AT vehicle
speed sensor by ICC unit via CAN communication
(TCM transmits AT vehicle speed sensor signal via
CAN communication).
PRESS SENS
[bar]×××Indicates brake fluid pressure value calculated
from signal voltage of pressure sensor.
PRESS SENS 2
[bar]××NOTE:
This item is displayed but cannot be monitored.
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 commu-
nication).
AT 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 transmits PNP switch
signal via CAN communication)
DISTANCE×NOTE:
This item is displayed but cannot be monitored.
RELATIVE SPD×NOTE:
This item is displayed but cannot be monitored.
STP LMP DRIVE
[ON/OFF]××Indicates [ON/OFF] status of brake hold relay drive
output. Monitored Item [unit] MAIN SIGNALSECU
INPUT
SIGNALSSELECTION
FROM MENUDescription
SKIA6195E

ACS-36
[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: August 20072004 QX56
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMSPFP:00000
Diagnostic Trouble Code (DTC) ChartEKS007X2
×:Applicable
DTC
No.CONSULT-II screen termsICC sys-
tem
warning
lampFail-safe
Malfunctions detected where...Refer-
ence
page Vehicle-
to-vehi-
cle dis-
tance
control
modeConven-
tional
(fixed
speed)
cruise
control
modeBrake
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

AT 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 pointACS-42
90 STOP LAMP RLY FIX×× ×
Normally open terminal of stop
lamp relay is stuckACS-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 ITEMS
ACS-41
[ICC]
C
D
E
F
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MA
B
ACS
Revision: August 20072004 QX56
6. CHECK ICC BRAKE HOLD RELAY
1. Turn ignition switch OFF.
2. Remove ICC brake hold relay.
3. Check continuity between terminals of ICC brake hold relay.
OK or NG
OK >> GO TO 7.
NG >> Replace ICC brake hold relay. Erase DTC and perform
ICC system running test. Then perform self-diagnosis of
ICC system again.
7. CHECK ICC BRAKE HOLD RELAY CIRCUIT
1. Disconnect connectors of ICC unit and stop lamp switch.
2. Check continuity between ICC unit harness connector B17 ter-
minal 38 (R/G) and ICC brake hold relay harness connector
E134 terminal 7 (R/G).
3. Check continuity between ICC unit harness connector B17 ter-
minal 38 (R/G) and stop lamp switch harness connector E38 ter-
minal 4 (R/G).
OK or NG
OK >> Replace ICC unit. Refer to ACS-59, "ICC Unit" . Erase
DTC and perform 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.

After repair, erase DTC and perform ICC system running test. Then, perform self-diagnosis of
ICC system again.
DTC 46 OPERATION SW CIRCEKS007X9
1. CHECK ECM CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect ECM connector, and connect it securely again. Then 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 ter-
minals. If any malfunction is detected, repair applicable part.) After repair, erase DTC, and per-
form ICC system running test. Then perform self-diagnosis of ICC system again.
NG >> GO TO 2.
2. CHECK ICC STEERING SWITCH

Check ICC steering switch. Refer to ACS-58, "ICC Steering Switch" .
OK or NG
OK >> GO TO 3.
NG >> Replace ICC steering switch assembly. Refer to ACS-59, "
ICC Steering Switch" . Erase DTC and
perform ICC system running test. Then perform self-diagnosis of ICC system again. 7 - 6 Continuity should not exist.
4 - 3 Continuity should exist.
SKIA6651E
Continuity should exist.
Continuity should exist.
WKIA3403E

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
ACS-43
[ICC]
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ACS
Revision: August 20072004 QX56
DTC 90 STOP LAMP RLY FIXEKS007XF
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.

After repair, erase DTC, and perform 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. 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. 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. Then perform self-diagnosis of
ICC system again.
Continuity should exist.
SKIA6658E

ACS-44
[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: August 20072004 QX56
6. CHECK HARNESS THROUGH ICC BRAKE HOLD RELAY, ICC BRAKE SWITCH, ICC UNIT
1. Disconnect ICC brake hold relay, ECM and ICC unit harness connectors.
2. Check continuity between ICC brake hold relay harness connec-
tor E134 terminal 4 (L) and ICC unit harness connector B17 ter-
minal 29 (BR/W).
3. Check continuity between ICC unit harness connector B17 ter-
minal 29 (BR/W) 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.

After repair, erase DTC and perform 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 (R/B) and ground.
OK or NG
OK >> Replace ICC unit. Refer to ACS-59, "ICC Unit" . Erase
DTC and perform ICC system running test. Then per-
form self-diagnosis of ICC system again.
NG >>

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

After repair, erase DTC and perform 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. 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. Then perform self-diagnosis of ICC system again.
NG >> GO TO 10.Continuity should exist.
Continuity should not exist.
WKIA1929E
Battery voltage should exist.
WKIA1930E

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
ACS-45
[ICC]
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ACS
Revision: August 20072004 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. Then per-
form self-diagnosis of ICC system again.
NG >> Replace ICC brake hold relay. Erase DTC and perform
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 (BR) and ICC brake hold relay harness connector E134
terminal 1 (BR).
3. Check continuity between ICC unit harness connector B17 ter-
minal 47 (BR) and ground.
4. Check continuity between ICC brake hold relay harness connec-
tor E134 terminal 2 (B) 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.

After repair, erase DTC and perform ICC system run-
ning 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
terminal 2.
OK or NG
OK >> GO TO 13.
NG >> Replace ICC brake hold relay. Erase DTC and perform
ICC system running test. Then perform self-diagnosis of
ICC system 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: August 20072004 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 (BR) 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. Then per-
form self-diagnosis of ICC system again.
14. CHECK ICC BRAKE HOLD RELAY POWER SUPPLY CIRCUIT
1. Check voltage between ICC brake hold relay harness connector
E134 terminal 6 (R/Y) and ground.
OK or NG
OK >> GO TO 15.
NG >>

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

After repair, erase DTC and perform ICC system run-
ning 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 brake hold relay and ICC unit harness connec-
tors.
3. Check continuity between ICC brake hold relay harness connec-
tor E134 terminal 7 (R/G) and ICC unit harness connector B17
terminal 38 (R/G).
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.

After repair, erase DTC and perform 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 ITEMS
ACS-47
[ICC]
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ACS
Revision: August 20072004 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. 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 (BR/W) and ground.
OK or NG
OK >> Replace ICC unit. Refer to ACS-59, "ICC Unit" . Erase
DTC and perform ICC system running test. Then per-
form self-diagnosis of ICC system again.
NG >> Replace stop lamp switch. Erase DTC and perform ICC
system running test. Then perform self-diagnosis of ICC
system again.
DTC 92 ECM CIRCUITEKS007XG
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 applicable item. Erase DTC and perform 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 applicable item. Erase DTC and perform 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. Then perform self-diagnosis of ICC system again.
29 - Ground Approx. 0V (during active test)
SKIA1200E

INDEX FOR DTC
AT-5
D
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AT
Revision: August 20072004 QX56
INDEX FOR DTCPFP:00024
Alphabetical Index UCS002BZ
NOTE:
If DTC U1000 is displayed with other DTC, first perform the trouble diagnosis for DTC U1000. Refer to
AT-1 03
.
*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 4 2
ATF PRES SW 1/CIRC — P1841AT- 1 7 5
ATF PRES SW 3/CIRC — P1843AT- 1 7 8
ATF PRES SW 5/CIRC — P1845AT- 1 8 1
ATF PRES SW 6/CIRC — P1846AT- 1 8 4
A/T INTERLOCK P1730 P1730AT- 1 3 9
A/T TCC S/V FNCTN P0744 P0744 AT- 1 2 1
ATF TEMP SEN/CIRC P0710 P1710AT- 1 3 1
CAN COMM CIRCUIT U1000 U1000AT- 1 0 3
D/C SOLENOID/CIRC P1762 P1762AT- 1 5 7
D/C SOLENOID FNCTN P1764 (*2 ) P1764 AT- 1 6 0
ENGINE SPEED SIG — P0725AT- 11 5
FR/B SOLENOID/CIRC P1757 P1757AT- 1 5 1
FR/B SOLENOID FNCT P1759 P1759 AT- 1 5 4
HLR/C SOL/CIRC P1767 P1767AT- 1 6 3
HLR/C SOL FNCTN P1769 (*2 ) P1769 AT- 1 6 6
I/C SOLENOID/CIRC P1752 P1752AT- 1 4 5
I/C SOLENOID FNCTN P1754 (*2 ) P1754 AT- 1 4 8
L/PRESS SOL/CIRC P0745 P0745AT- 1 2 4
LC/B SOLENOID/CIRC P1772 P1772AT- 1 6 9
LC/B SOLENOID FNCT P1774 P1774 AT- 1 7 2
PNP SW/CIRC P0705 P0705AT- 1 0 9
STARTER RELAY/CIRC — P0615AT- 1 0 5
TCC SOLENOID/CIRC P0740 P0740AT- 11 8
TCM P0700 P0700AT- 1 0 8
TCM·RAM — P1702AT- 1 2 7
TCM·ROM — P1703AT- 1 2 8
TP SEN/CIRC A/T — P1705AT- 1 2 9
TURBINE REV S/CIRC P1716 P1716AT- 1 3 4
VEH SPD SE/CIR·MTR — P1721AT- 1 3 6
VEH SPD SEN/CIR AT P0720 P0720AT- 11 2

AT-6
INDEX FOR DTC
Revision: August 20072004 QX56
DTC No. Index UCS002C0
NOTE:
If DTC U1000 is displayed with other DTC, first perform the trouble diagnosis for DTC U1000. Refer to
AT- 1 0 3 , "
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/CIRCAT- 1 0 5
P0700 P0700 TCMAT- 1 0 8
P0705 P0705 PNP SW/CIRCAT- 1 0 9
P0710 P1710 ATF TEMP SEN/CIRCAT- 1 3 1
P0720 P0720 VEH SPD SEN/CIR ATAT-11 2
— P0725 ENGINE SPEED SIGAT-11 5
P0740 P0740 TCC SOLENOID/CIRCAT-11 8
P0744 P0744 A/T TCC S/V FNCTNAT- 1 2 1
P0745 P0745 L/PRESS SOL/CIRCAT- 1 2 4
— P1702 TCM·RAMAT- 1 2 7
— P1703 TCM·ROMAT- 1 2 8
— P1705 TP SEN/CIRC A/TAT- 1 2 9
P1716 P1716 TURBINE REV S/CIRCAT- 1 3 6
— P1721 VEH SPD SE/CIR·MTRAT- 1 3 6
P1730 P1730 A/T INTERLOCKAT- 1 3 9
— P1731 A/T 1ST E/BRAKINGAT- 1 4 2
P1752 P1752 I/C SOLENOID/CIRCAT- 1 4 5
P1754 (*2 ) P1754 I/C SOLENOID FNCTNAT- 1 4 8
P1757 P1757 FR/B SOLENOID/CIRCAT- 1 5 1
P1759 (*2 ) P1759 FR/B SOLENOID FNCTAT- 1 5 4
P1762 P1762 D/C SOLENOID/CIRCAT- 1 5 7
P1764 (*2 ) P1764 D/C SOLENOID FNCTNAT- 1 6 0
P1767 P1767 HLR/C SOL/CIRCAT- 1 6 3
P1769 P1769 HLR/C SOL FNCTNAT- 1 6 6
P1772 P1772 LC/B SOLENOID/CIRCAT- 1 6 9
P1774 P1774 LC/B SOLENOID FNCTAT- 1 7 2
— P1841 ATF PRES SW 1/CIRCAT- 1 7 5
— P1843 ATF PRES SW 3/CIRCAT- 1 7 8
— P1845 ATF PRES SW 5/CIRCAT- 1 8 1
— P1846 ATF PRES SW 6/CIRCAT- 1 8 4
U1000 U1000 CAN COMM CIRCUITAT- 1 0 3