2004 INFINITI FX35 ignition

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
ACS-37
[ICC]
C
D
E
F
G
H
I
J
L
MA
B
ACS
Revision: 2004 November 2004 FX35/FX45

When more than one malfunctions are detected, a maximum of 3 code numbers can be stored;
the latest malfunction will be displayed first.
6. Check ACS-40, "
Diagnostic Trouble Code (DTC) Chart" , and repair or replace if necessary.
7. After repair, erase DTC stored in the ICC unit.
8. DTC 55 will be shown.
9. Turn ignition switch OFF to exit the diagnosis.
10. Perform ICC system running test (drive vehicle with ICC system ON), and make sure that ICC warning
lamp does not illuminate.
Self-Diagnostic Erasing Method
1. Stop the vehicle and turn the ignition switch OFF.
2. Turn ignition switch ON and start self-diagnosis.
3. During self-diagnosis mode, press CANCEL switch 5 times, and DISTANCE switch 5 times in this order.
CAUTION:

Press them within 10 seconds after pressing CANCEL switch at first.

When operation is not completed within 10 seconds, start again from above go to 2.
4. DTC 55 will be shown.
CAUTION:
DTC of an existing malfunction will not be erased.
5. Turn ignition switch OFF to exit the diagnosis.
6. Perform ICC system running test (drive vehicle with ICC system ON), and make sure that ICC system
warning lamp (yellow) does not illuminate.
SELF-DIAGNOSIS BY ICC SYSTEM DISPLAY WILL NOT RUN.
Possible Irregular Condition
SKIA7068E
Open or short lines Trouble phenomenon Malfunction causes
ICC unit power supply malfunction No voltage supply from ignition switch Fuse blown
Harness open
Harness shorted
Ground cable not connected Harness open
Harness shorted
ICC steering switch malfunction No signal transmitted Harness open
Harness shorted
Spiral cable open
Spiral cable shorted
Switch or ECM malfunction
CAN communication system malfunction Signal not transmitted Harness open
Harness shorted
CAN communication outside the stan-
dard.

ACS-38
[ICC]
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
Revision: 2004 November 2004 FX35/FX45
1. CHECK ICC SYSTEM DISPLAY

When ignition switch is ON, do all displays illuminate?
YES or NO
YES >> GO TO 2.
NO >> GO TO 5.
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.
3. CHECK HARNESS BETWEEN ECM AND ICC STEERING SWITCH

Check harness and spiral cable between ECM and ICC steering switch for open or short circuit.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness or spiral cable between ECM and ICC steering switch.
4. CHECK SELF-DIAGNOSIS

Disconnect connector of ECM, and check terminals for bend and looseness. Securely connect it again.

Enter self-diagnosis mode for ICC system?
YES or NO
YES >> INSPECTION END
NO >> GO TO 5.
5. CHECK POWER SUPPLY FOR ICC UNIT

Check ICC unit power supply, and repair if necessary.

When ignition switch is ON, do all displays illuminate?
YES or NO
YES >> Perform self-diagnosis again.
NO >> GO TO 6.
6. CHECK CONNECTOR FOR ICC UNIT

Disconnect connector of ICC unit, and check terminals for bend and looseness. Securely connect it again.

When ignition switch is ON, do all displays illuminate?
YES or NO
YES >> Perform self-diagnosis again.
NO >> GO TO 7.
Combination meter system malfunction Indication not possible Indicator malfunction
Indicator segments disappear.
ICC unit malfunctionOpen or short lines Trouble phenomenon Malfunction causes

ACS-42
[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: 2004 November 2004 FX35/FX45
DTC 31 POWER SUPPLY CIR, DTC 34 POWER SUPPLY CIR 2AKS006YZ
1. CHECK CONNECTOR ICC UNIT
1. Turn ignition switch OFF.
2. Disconnect ICC unit connector, and connect it securely again. Then erase DTC. After that perform self-
diagnosis of ICC system again.
OK or NG
OK >> GO TO 2.
NG >>

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 running test. Then perform self-diagnosis of ICC system again.
2. CHECK POWER SUPPLY CIRCUIT FOR ICC UNIT
1. Turn ignition switch ON.
2. Check voltage between ICC unit harness connector M89 termi-
nal 33 (G/R), 42 (G/R) and ground.
OK or NG
OK >> GO TO 3.
NG >>

Repair ICC unit power supply harness.

After repair, erase DTC and perform ICC system run-
ning test. Then, perform self-diagnosis of ICC system
again.
3. CHECK GROUND CIRCUIT FOR ICC UNIT
1. Turn ignition switch OFF.
2. Disconnect ICC unit connector.
3. Check continuity between ICC unit harness connector M88 ter-
minal 19 (B), 20 (B), M89 terminal 46 (B) and ground.
OK or NG
OK >> After replacing ICC unit, erase DTC, and perform ICC
system running test. Then perform self-diagnosis of ICC
system again.
NG >>

Repair ICC unit ground harness.

After repair, erase DTC and perform ICC system running test. Then, perform self-diagnosis of
ICC system again.
DTC 41 VHCL SPEED SE CIRCAKS006Z0
1. PERFORM ICC UNIT SELF-DIAGNOSIS
1. Perform self-diagnosis. Is “DTC 43 ABS/TCS/VDC CIRC” or “DTC 20 CAN COMM CIRCUIT” indicated in
self-diagnosis item display?
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 2Battery voltage should exist.
SKIA1173E
Continuity should exist.
SKIA6650E

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
ACS-43
[ICC]
C
D
E
F
G
H
I
J
L
MA
B
ACS
Revision: 2004 November 2004 FX35/FX45
2. CHECK AT VEHICLE SPEED SENSOR
With CONSULT-II

With data monitor, check “VHCL SPD AT”operate normally. Refer to ACS-32, "DATA MONITOR" .
OK or NG
OK >> Replace ICC unit. Erase DTC and perform ICC system running test. Then perform self-diagnosis
of ICC system again.
NG >>

Check TCM.

After repair, erase DTC and perform ICC system running test. Then, perform self-diagnosis of
ICC system again.
DTC 43 ABS/TCS/VDC CIRCAKS006Z2
1. DIAGNOSIS CHECK 1
With CONSULT-II

Perform self-diagnosis. 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 self-diagnosis of ABS actuator and electric unit (control unit). 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. Erase DTC and perform ICC system running test. Then perform self-diagnosis
of ICC system again.
DTC 45 BRAKE SW/STOP L SWAKS006Z3
1. CHECK CONNECTOR FOR ICC UNIT
1. Turn ignition switch OFF.
2. Disconnect ICC unit connector, and connect it 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 STOP LAMP SWITCH AND ICC BRAKE SWITCH
With CONSULT-II

With data monitor, check if “STOP LAMP SW” and “BRAKE SW” are operated normally. Refer to ACS-32,
"DATA MONITOR" .
OK or NG
OK >> Replace ICC unit. Erase DTC and perform ICC system running test. Then perform self-diagnosis
of ICC system again.
NG >>

BRAKE SW: GO TO 3.

STOP LAMP SW: GO TO 5.

ACS-44
[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: 2004 November 2004 FX35/FX45
3. BRAKE SWITCH INSTALLATION AND ADJUSTMENT INSPECTION

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

Check ICC brake switch. Refer to ACS-65, "ICC Brake Switch and Stop Lamp 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 >> Replace ICC brake switch. Erase DTC and perform ICC system running test. Then perform self-
diagnosis of ICC system again.
5. CHECK STOP LAMP ILLUMINATION

Check stop lamp illumination.
OK or NG
OK >> GO TO 6.
NG >>

Check stop lamp circuit.

After repair, erase DTC and perform ICC system running test. Then, perform self-diagnosis of
ICC system again.
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.
OK or NG
OK >> GO TO 7.
NG >> Replace brake hold relay. Erase DTC and perform ICC
system running test. Then perform self-diagnosis of ICC
system again. 6 - 7 Continuity should not exist.
3 - 4 Continuity should exist.
SKIA6651E

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
ACS-45
[ICC]
C
D
E
F
G
H
I
J
L
MA
B
ACS
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]
C
D
E
F
G
H
I
J
L
MA
B
ACS
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