2004 INFINITI FX35 brake system

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
ACS-45
[ICC]
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Revision: 2004 November 2004 FX35/FX45
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 M89 ter-
minal 38 (P/G) and ICC brake hold relay harness connector E14
terminal 7 (P).
3. Check continuity between ICC unit harness connector M89 ter-
minal 38 (P/G) and stop lamp switch harness connector E210
terminal 2 (P).
OK or NG
OK >> Replace 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.

After repair, erase DTC and perform ICC system running test. Then, perform self-diagnosis of
ICC system again.
DTC 46 OPERATION SW CIRCAKS007I0
1. CHECK CONNECTOR FOR ECM
1. Turn ignition switch OFF.
2. Disconnect ECM connector, and connect it securely again. Then erase DTC. After that, perform self-diag-
nosis 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-65, "ICC Steering Switch" .
OK or NG
OK >> GO TO 3.
NG >> Replace ICC steering switch (steering wheel assembly). Erase DTC and perform ICC system run-
ning test. Then perform self-diagnosis of ICC system again. Continuity should exist.
Continuity should exist.
SKIA5977E

ACS-46
[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: 2004 November 2004 FX35/FX45
3. CHECK ICC STEERING SWITCH SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect connectors of ECM and spiral cable.
3. Check continuity between ECM harness connector M90 terminal
82 (B/W), 99 (G/Y) and spiral cable M15 terminal 33 (B/W), 34
(G/Y).
4. Check continuity between spiral cable (on vehicle) harness con-
nector M15 terminal 33, 34 and spiral cable (on switch) harness
connector M203 terminal 14,15.
OK or NG
OK >> Replace ECM. Erase DTC and perform ICC system run-
ning test. Then perform self-diagnosis of ICC system
again.
NG >>

Repair harness between ICC unit and spiral cable.

After repair, erase DTC and perform ICC system run-
ning test. Then, perform self-diagnosis of ICC system
again.
DTC 61 PRESS SEN CIRCUITAKS006Z5
1. CHECK CONNECTOR BRAKE PRESSURE SENSOR AND ICC UNIT
1. Turn ignition switch OFF.
2. Disconnect connectors of brake pressure sensor and ICC unit, and connect them securely again. Then
erase DTC. After that, 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 HARNESS BETWEEN BRAKE PRESSURE SENSOR AND ICC UNIT
1. Turn ignition switch OFF.
2. Disconnect connectors of ICC unit and brake pressure sensor.
3. Check continuity between ICC unit harness connector M88 ter-
minal 8 (Y/G), 17 (BR), 24 (Y/R) and brake pressure sensor har-
ness connector E142 terminal 3 (Y/G), 2 (OR), 1 (Y/R).
OK or NG
OK >> GO TO 3.
NG >>

Repair harness between brake pressure sensor and
ICC unit.

After repair, erase DTC and perform ICC system running test. Then, perform self-diagnosis of
ICC system again. 82 - 33, 99 - 34 Continuity should exist.
SKIA5978E
34 - 14, 33 - 15 Continuity should exist.
SKIA5979E
8 - 3, 17 - 2, 24 - 1 Continuity should exist.
SKIA6652E

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
ACS-47
[ICC]
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Revision: 2004 November 2004 FX35/FX45
3. CHECK POWER SUPPLY CIRCUIT FOR BRAKE PRESSURE SENSOR
1. Connect ICC unit.
2. Turn ignition switch ON.
3. Check voltage between ICC unit harness connector M88 termi-
nal 8 (Y/G) and 24 (Y/R).
OK or NG
OK >>
Brake pressure sensor malfunction.

Replace brake pressure sensorBR-13, "BRAKE MAS-
TER CYLINDER" . Erase DTC and perform ICC sys-
tem running test. Then perform self-diagnosis of ICC
system again.
NG >> Replace ICC unit. Clear DTC and perform driving check. Then perform self-diagnosis of ICC sys-
tem again.
DTC 62 BOOSTER SOL/V CIRCUITAKS006Z6
1. CHECK SOLENOID/RELEASE SWITCH AND ICC UNIT CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect connectors of brake booster solenoid/release and ICC unit, and connect them securely again.
Then erase DTC. After that 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 HARNESS BETWEEN SOLENOID/RELEASE SWITCH AND ICC UNIT
1. Turn ignition switch OFF.
2. Disconnect ICC unit connector and brake booster solenoid
release switch connector.
3. Check continuity between ICC unit harness connector M88 ter-
minal 10 (B/R), 12 (L/W) and brake booster harness connector
E54 terminal 4 (B), 6 (L).
OK or NG
OK >> GO TO 3.
NG >>

Repair harness between brake booster solenoid/
release switch and ICC unit.

After repair, Erase DTC and perform ICC system running test. Then, perform self-diagnosis of
ICC system again.
3. CHECK BOOSTER SOLENOID

Check booster solenoid. Refer to ACS-65, "Booster Solenoid" .
OK or NG
OK >> Replace ICC unit. Erase DTC and perform ICC system running test. Then perform self-diagnosis
of ICC system again.
NG >>

Replace booster solenoid.

Replace booster solenoid. Erase DTC and perform ICC system running test. Then perform self-
diagnosis of ICC system again. 8 (+) - 24 (–) Approx. 5V
SKIA6653E
10 - 4, 12 - 6 Continuity should exist.
SKIA6654E

ACS-48
[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: 2004 November 2004 FX35/FX45
DTC 63 RELEASE SW CIRCUITAKS006Z7
1. CHECK SOLENOID/RELEASE SWITCH AND ICC UNIT CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect brake booster solenoid/release switch connector and ICC unit connector, and connect them
securely again. Then erase DTC. After that, 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 HARNESS SOLENOID/RELEASE SWITCH AND ICC UNIT
1. Turn ignition switch OFF.
2. Disconnect brake booster solenoid/release switch connector
and ICC unit connector.
3. Check continuity between ICC unit harness connector m88 ter-
minal 6 (GY/L), 15 (LG/R), 22 (G/Y) and Brake booster harness
connector E54 terminal 1 (R), 3 (LG), 2 (G).
OK or NG
OK >> GO TO 3.
NG >>

Repair harness between brake booster solenoid/
release switch and ICC unit.

After repair, Erase DTC and perform ICC system running test. Then, perform self-diagnosis of
ICC system again.
3. CHECK RELEASE SWITCH POWER SUPPLY CIRCUIT
1. Connect ICC unit connector.
2. Turn ignition switch ON.
3. Check voltage between ICC unit harness connector M88 termi-
nal 6 (GY/L) and ground.
OK or NG
OK >> GO TO 4.
NG >> Replace ICC unit. Erase DTC and perform ICC system
running test. Then perform self-diagnosis of ICC system
again.
4. CHECK RELEASE SWITCH

Check release switch. Refer to ACS-66, "Release Switch" .
OK or NG
OK >> Replace ICC unit. Erase DTC and perform ICC system running test. Then perform self-diagnosis
of ICC system again.
NG >>

Release switch malfunction.

Replace booster. Erase DTC and perform ICC system running test. Then perform self-diagno-
sis of ICC system again. 6 - 1, 15 - 3, 22 - 2 Continuity should exist.
SKIA6655E
Approx. 10V
SKIA6656E

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
ACS-49
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Revision: 2004 November 2004 FX35/FX45
DTC 65 PRESSURE CONTROLAKS006Z8
1. OPERATION CHECK

Check foot brake pedal operates normally.
OK or NG
OK >> GO TO 2.
NG >>

Check brake circuit.

After repair, Erase DTC, and perform active test (BOOSTER SOL/V3) with CONSULT-II. Then
perform self-diagnosis of ICC system again.
2. CHECK BOOSTER SOLENOID

Check booster solenoid. Refer to ACS-65, "Booster Solenoid" .
OK or NG
OK >> GO TO 3.
NG >>

Solenoid malfunction.

Replace booster. Erase DTC and perform ICC system running test. Then perform self-diagno-
sis of ICC system again.
3. CHECK HARNESS BETWEEN SOLENOID/RELEASE SWITCH AND ICC UNIT
1. Turn ignition switch OFF.
2. Disconnect ICC unit connector and brake booster solenoid/
release switch connector.
3. Check continuity between ICC unit harness connector M88 ter-
minal 10 (B/R), 12 (L/W) and brake booster solenoid/release
harness connector E54 terminal 4 (B), 6 (L).
OK or NG
OK >> Replace ICC unit. Erase DTC and perform ICC system
running test. Then perform self-diagnosis of ICC system
again.
NG >>

Repair harness between brake booster solenoid/release switch and ICC unit.

After repair, Erase DTC and perform ICC system running test. Then, perform self-diagnosis of
ICC system again.
DTC 74 LASER BEAM OFF CNTRAKS006Z9
1. DIAGNOSTIC CHECK
1. Adjust laser beam aiming. Then erase DTC, and perform ICC system ICC system running test.
2. After that, perform self-diagnosis of ICC system. Is DTC 74 LASER BEAM OFF CNTR indicated?
YES or NO
YES >>
Replace ICC sensor, and adjust laser beam aiming.

After that, Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC
system again.
NO >> INSPECTION END10 - 4, 12 - 6 Continuity should exist.
SKIA6654E

ACS-50
[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: 2004 November 2004 FX35/FX45
DTC 90 STOP LAMP RLY FIXAKS006ZE
1. CHECK CONNECTOR ICC UNIT
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.Refer to ACS-32,
"DATA MONITOR" .
OK or NG
OK >> GO TO 11.
NG >>

BRAKE SW: GO TO 3.

STOP LAMP SW: GO TO 8.
3. CHECK AND ADJUST BRAKE SWITCH

Check brake switch for proper installation and adjust if necessary.Refer to BR-6, "BRAKE PEDAL" in
“BR”.
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 AND STOP LAMP SWITCH

Check ICC brake switch and stop lamp switch. Refer to ACS-65, "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 3 and terminal 4.
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

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
ACS-51
[ICC]
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Revision: 2004 November 2004 FX35/FX45
6. CHECK HARNESS THROUGH ICC BRAKE HOLD RELAY, ICC BRAKE SWITCH, ICC UNIT
1. Disconnect ICC brake hold relay, ICC brake switch, ECM and
ICC unit harness connector.
2. Check continuity between ICC brake hold relay harness connec-
tor E14 terminal 3 (L) and ICC brake switch harness connector
E209 terminal 2 (L).
3. Check continuity between ICC brake hold relay harness connec-
tor E14 terminal 3 (L) and ground.
4. Check continuity between ICC brake hold relay harness connec-
tor E14 terminal 4 (SB) and ICC unit harness connector M89 ter-
minal 29 (SB).
5. Check continuity between ICC unit harness connector M89 ter-
minal 29 (SB) 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 SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between ICC brake switch harness connector
E209 terminal 1 (Y) and ground.
OK or NG
OK >> Replace ICC unit. Erase DTC and perform ICC system
running test. Then perform self-diagnosis of ICC system
again.
NG >>

Malfunction of fuse, or ICC brake switch power supply
system harness.

After repair, erase DTC and perform ICC system running test. Then, perform self-diagnosis of
ICC system again.
8. CHECK STOP LAMP ILLUMINATION
1. Turn ignition switch OFF.
2. Disconnect ICC brake hold relay connector.
3. Check stop lamp circuit.
OK or NG
OK >> GO TO 9.
NG >> After repair, erase DTC and perform ICC system running test. Then, perform self-diagnosis of ICC
system again. Continuity should exist.
Continuity should not exist.
SKIA6198E
Continuity should exist.
Continuity should not exist.
SKIA5980E
Approx. 12V
SKIA5981E

ACS-52
[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: 2004 November 2004 FX35/FX45
9. CHECK ICC BRAKE HOLD RELAY CIRCUIT
1. Connect ICC brake hold relay connector.
2. Disconnect stop lamp switch connector.
3. When brake pedal is not depressed, make sure that stop lamp does not illuminate.
OK or NG
OK >> Replace ICC unit. Erase DTC and perform ICC system running test. Then perform self-diagnosis
of ICC system again.
NG >> GO TO 10.
10. CHECK ICC BRAKE HOLD RELAY
1. Disconnect ICC brake hold relay.
2. Check continuity between ICC brake hold relay E14 terminal 6
and terminal 7.
OK or NG
OK >> Replace ICC unit. Erase DTC and perform 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. Then perform self-diagnosis of
ICC system again.
11 . CHECK HARNESS THROUGH ICC UNIT, ICC BRAKE HOLD RELAY, AND GROUND
1. Disconnect connectors of ICC unit and ICC brake hold relay.
2. Check continuity between ICC unit harness connector M89 ter-
minal 47 (W/R) and ICC brake hold relay harness connector E14
terminal 1 (W).
3. Check continuity between ICC unit harness connector M89 ter-
minal 47 (W/R) and ground.
4. Check continuity between ICC brake hold relay harness connec-
tor E14 terminal 2 (B) and ground.
OK or NG
OK >> GO TO 12.
NG >>

Repair harness through ICC unit, 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. Continuity should not exist.
SKIA6659E
47 - 1 Continuity should exist.
47 - Ground Continuity should not exist.
SKIA6660E
Continuity should exist.
SKIA6661E