Infiniti M45 (Y34). Manual - part 21

 

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Infiniti M45 (Y34). Manual - part 21

 

 

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS

ACS-77

[ICC]

C

D

E

F

G

H

I

J

L

M

A

B

ACS

DTC 61 PRESS SEN CIRCUIT

AKS002QM

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 B243 ter-
minal 8 (G/OR), 17 (B/Y), 24 (OR) and brake pressure sensor
harness connector E82 terminal 3 (G/OR), 2 (B/Y), 1 (OR).

OK or NG

NG

>>

Repair harness between brake pressure sensor and
ICC unit

After repair, erase DTC and perform ICC system run-
ning test. Then, perform self-diagnosis of ICC system again.

OK

>> GO TO 3.

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 B243 termi-
nal 8 (G/OR) and 24 (OR).

OK or NG

NG

>> Replace ICC unit. Clear DTC and perform driving check.

Then perform self-diagnosis of ICC system again.

OK

>>

Brake pressure sensor malfunction

Replace master cylinder assembly. Erase DTC and
perform ICC system running test. Then perform self-diagnosis of ICC system again.

DTC 62 BOOSTER SOL/V CIRCUIT

AKS002QN

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.

8 - 3, 17 - 2, 24 - 1

Continuity should exist.

SKIA1591E

8 (+) - 24 (–)

Approx. 5V

SKIA1268E

ACS-78

[ICC]

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS

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 B243 ter-
minal 10 (R), 12 (W) and brake booster harness connector E81
terminal 4 (R), 6 (W).

OK or NG

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.

OK

>> GO TO 3.

3. 

CHECK BOOSTER SOLENOID

Check booster solenoid. Refer to 

ACS-101, "Booster Solenoid"

 .

OK or NG

NG

>>

Replace Booster solenoid 

Replace booster solenoid. Erase DTC and perform ICC system running test. Then perform self-
diagnosis of ICC system again.

OK

>> Replace ICC unit. Erase DTC and perform ICC system running test. Then perform self-diagnosis

of ICC system again.

DTC 63 RELEASE SW CIRCUIT

AKS002QO

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.

10 - 4, 12 - 6

Continuity should exist.

SKIA1269E

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS

ACS-79

[ICC]

C

D

E

F

G

H

I

J

L

M

A

B

ACS

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 B243 ter-
minal 6 (L), 15 (P), 22 (R/B) and Brake booster harness connec-
tor E81 terminal 1 (L), 3 (P), 2 (R/B).

OK or NG

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.

OK

>> GO TO 3.

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 B243 termi-
nal 6 (L) and ground.

OK or NG

NG

>> Replace ICC unit. Erase DTC and perform ICC system

running test. Then perform self-diagnosis of ICC system
again.

OK

>> GO TO 4.

4. 

CHECK RELEASE SWITCH 

Check release switch. Refer to 

ACS-102, "Release Switch"

 .

OK or NG

NG

>>

Release switch malfunction

Replace booster. Erase DTC and perform ICC system running test. Then perform self-diagno-
sis of ICC system again.

OK

>> Replace ICC unit. Erase DTC and perform ICC system running test. Then perform self-diagnosis

of ICC system again.

DTC 65 PRESSURE CONTROL

AKS002QP

1. 

OPERATION CHECK 

Check foot brake pedal operates normally.

OK or NG

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.

OK

>> GO TO 2.

6 - 1, 15 - 3, 22 - 2

Continuity should exist.

SKIA1183E

Approx. 10V

SKIA1184E

ACS-80

[ICC]

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS

2. 

CHECK BOOSTER SOLENOID 

Check booster solenoid. Refer to 

ACS-101, "Booster Solenoid"

 .

OK or NG

NG

>>

Solenoid malfunction

Replace booster. Erase DTC and perform ICC system running test. Then perform self-diagno-
sis of ICC system again.

OK

>> GO TO 3.

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 B243 ter-
minal 10 (R), 12 (W) and brake booster solenoid/release har-
ness connector E81 terminal 4 (R), 6 (W).

OK or NG

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.

OK

>> Replace ICC unit. Erase DTC and perform ICC system running test. Then perform self-diagnosis

of ICC system again.

DTC 74 LASER BEAM OFF CNTR

AKS002QQ

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 is completed.

DTC 81 POWER SUPPLY VALVE [HI VOLTAGE]

AKS002QR

1. 

CHECK ICC UNIT REFERENCE SIGNAL 

1.

Start the engine.

2.

Turn ON/OFF switch ON.

3.

Check voltage between ICC unit harness connector B245 termi-
nal 57 (R/G) and ground.

OK or NG

NG

>> GO TO 2.

OK

>> GO TO 3.

10 - 4, 12 - 6

Continuity should exist.

SKIA1269E

Approx. 0V

PKIA2590E

 

 

 

 

 

 

 

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