Infiniti M45 (Y34). Manual - part 22

 

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Infiniti M45 (Y34). Manual - part 22

 

 

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS

ACS-81

[ICC]

C

D

E

F

G

H

I

J

L

M

A

B

ACS

2. 

CHECK HARNESS BETWEEN ICC UNIT AND ASCD PUMP

1.

Turn ignition switch OFF.

2.

Disconnect ASCD pump connector.

3.

Check voltage between ASCD pump harness connector E15
terminal 1 (R/G) and ground.

OK or NG

NG

>>

Repair harness between ICC unit and ASCD pump

After repair, erase DTC and perform ICC system run-
ning 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.

3. 

CHECK ICC UNIT REFERENCE SIGNAL

1.

Connect ASCD pump connector.

2.

Start engine.

3.

Turn ON/OFF switch ON.

4.

Check voltage between ICC unit harness connector B245 termi-
nal 70 (Y/B) and ground.

OK or NG

NG

>>

Repair harness between ICC unit and ASCD pump.

After repair, erase DTC and perform ICC system run-
ning 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 83 VACUUM PUMP [LOW VOLTAGE]

AKS002QS

1. 

CHECK ASCD ACTUATOR 

Check ASCD actuator. Refer to 

ACS-102, "ASCD Actuator"

 .

OK or NG

NG

>> Replace ASCD actuator. Erase DTC, and perform self-diagnosis of ICC system again.

OK

>> GO TO 2.

2. 

CHECK HARNESS BETWEEN ICC UNIT AND ASCD PUMP

1.

Turn ignition switch OFF.

2.

Disconnect ICC unit connector and ASCD pump connector.

3.

Check continuity between ICC unit harness connector B245 ter-
minal 57 (R/G), 72 (L/R) and ASCD pump harness connector
E15 terminal 1 (R/G), 4 (L/R).

OK or NG

NG

>>

Repair harness between ICC unit and ASCD pump

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

OK

>> GO TO 3.

Approx. 0V

SKIA3074E

Approx. 0V

SKIA1187E

57 - 1, 72 - 4

Continuity should exist.

SKIA1189E

ACS-82

[ICC]

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS

3. 

CHECK CONNECTOR ASCD PUMP AND ICC UNIT 

Check ASCD pump and ICC unit terminal for looseness and bend.

OK or NG

NG

>> Repair terminal or connector. Erase DTC, and perform self-diagnosis of ICC system again.

OK

>> Replace ICC unit. Erase DTC, and perform self-diagnosis of ICC system again.

DTC 85 AIR VALVE [LOW VOLTAGE]

AKS002QT

1. 

CHECK ASCD PUMP

Check ASCD pump. Refer to 

ACS-102, "ASCD Pump"

  

OK or NG

NG

>> Replace ASCD pump. Erase DTC, and perform self-diagnosis of ICC system again.

OK

>> GO TO 2.

2. 

CHECK HARNESS BETWEEN ICC UNIT AND ASCD PUMP

1.

Turn ignition switch OFF.

2.

Disconnect ICC unit connector and ASCD pump connector.

3.

Check continuity between ICC unit harness connector B245 ter-
minal 57 (R/G), 71 (G/Y) and ASCD pump harness connector
E15 terminal 1 (R/G), 2 (G/Y).

OK or NG

NG

>>

Repair harness between ICC unit and ASCD pump

After repair, erase DTC, and perform self-diagnosis of
ICC system again.

OK

>> GO TO 3.

3. 

CHECK CONNECTOR PUMP ASCD AND ICC UNIT 

Check ASCD pump and ICC unit terminal for looseness and bend.

OK or NG

NG

>> Repair terminal or connector. Erase DTC, and perform self-diagnosis of ICC system again.

OK

>> Replace ICC unit. Erase DTC, and perform self-diagnosis of ICC system again.

DTC 87 RELEASE VALVE [LOW VOLTAGE]

AKS002QU

1. 

CHECK ASCD PUMP 

Check ASCD pump. Refer to 

ACS-102, "ASCD Pump"

 .

OK or NG

NG

>> Replace ASCD pump. Erase DTC, and perform self-diagnosis of ICC system again.

OK

>> GO TO 2.

57 - 1, 71 - 2

Continuity should exist.

SKIA1190E

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS

ACS-83

[ICC]

C

D

E

F

G

H

I

J

L

M

A

B

ACS

2. 

CHECK HARNESS BETWEEN ICC UNIT AND PUMP

1.

Turn ignition switch OFF.

2.

Disconnect ICC unit connector and ASCD pump connector.

3.

Check continuity between ICC unit harness connector B245 ter-
minal 57 (R/G), 70 (Y/B) and ASCD pump harness connector
E15 terminal 1 (R/G), 3 (Y/B).

OK or NG

NG

>>

Repair harness between ICC unit and ASCD pump

After repair, erase DTC, and perform self-diagnosis of
ICC system again.

OK

>> GO TO 3.

3. 

CHECK CONNECTOR ASCD PUMP AND ICC UNIT 

Check ASCD pump and ICC unit terminal for looseness or bend.

OK or NG

NG

>> Repair terminal or connector. Erase DTC, and perform self-diagnosis of ICC system again.

OK

>> Replace ICC unit. Erase DTC, and perform self-diagnosis of ICC system again.

DTC 90 STOP LAMP RLY FIX

AKS002QV

1. 

CHECK CONNECTOR ICC UNIT 

1.

Turn ignition switch OFF.

2.

Disconnect and check ICC unit connector.

OK or NG

NG

>>

Connector malfunction

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

OK

>> GO TO 2.

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-60,

"DATA MONITOR"

OK or NG

NG

>>

BRAKE SW: GO TO 3.

STOP LAMP SW: GO TO 8.

OK

>> GO TO 11.

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

NG

>> After adjustment, erase DTC and perform ICC system running test. Then perform self-diagnosis

of ICC system again.

OK

>> GO TO 4.

57 - 1, 70 - 3

Continuity should exist.

SKIA1191E

ACS-84

[ICC]

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS

4. 

CHECK ICC BRAKE SWITCH AND STOP LAMP SWITCH

Check ICC brake switch and stop lamp switch. Refer to 

ACS-101, "ICC Brake Switch and Stop Lamp

Switch"

 .

OK or NG

NG

>> Replace ICC brake switch. Erase DTC and perform ICC system running test. Then perform self-

diagnosis of ICC system again.

OK

>> GO TO 5.

5. 

CHECK ICC BRAKE HOLD RELAY 

Remove ICC brake hold relay, and check continuity between
ICC brake hold relay terminal 3 and terminal 4.

OK or NG

NG

>> Replace ICC brake hold relay. Erase DTC and perform

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

OK

>> GO TO 6.

6. 

CHECK HARNESS THROUGH ICC BRAKE HOLD RELAY, ICC BRAKE SWITCH, ICC UNIT

1.

Disconnect ICC brake switch and, ICC unit connector.

2.

Check continuity between ICC brake hold relay harness connec-
tor E38 terminal 3 (OR) and ICC brake switch harness connec-
tor M404 terminal 1 (BR/Y).

3.

Check continuity between ICC brake hold relay harness connec-
tor E38 terminal 3 (OR) and ground.

4.

Check continuity between ICC brake hold relay harness connec-
tor E38 terminal 1 (L/W) and ICC unit harness connector B244
terminal 47 (L/W).

5.

Check continuity between ICC unit harness connector B244 ter-
minal 47 (L/W) and ground.

OK or NG

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.

OK

>> GO TO 7.

Continuity should exist.

SKIA1192E

Continuity should exist.

Continuity should not exist.

PKIA2591E

Continuity should exist.

Continuity should not exist.

SKIA1272E

 

 

 

 

 

 

 

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