Infiniti Q45. Manual — part 17

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS

ACS-61

[ICC]

C

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ACS

15.

CHECK ICC UNIT STANDARD VOLTAGE

With CONSULT-II

1.

Connect ICC unit connector and stop lamp switch connector.

2.

Perform “ACTIVE TEST” (“STOP LAMP”:“STP LMP DRIVE
ON”) with CONSULT-II, and check voltage between ICC unit
harness connector and ground.

OK or NG

OK

>> GO TO 16.

NG

>> 1. Replace ICC unit.

2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system

again.

16.

CHECK ICC BRAKE HOLD RELAY POWER SUPPLY CIRCUIT

Check voltage between ICC brake hold relay harness connector and
ground.

OK or NG

OK

>> GO TO 17.

NG

>> 1. Repair or replace harness or fuse.

2. Erase DTC and perform ICC system running test.

Then perform self-diagnosis of ICC system again.

17.

CHECK HARNESS BETWEEN ICC UNIT AND ICC BRAKE HOLD RELAY

1.

Disconnect ICC unit and ICC brake hold relay connector.

2.

Check continuity between ICC unit harness connector and ICC
brake hold relay harness connector.

3.

Check continuity between ICC unit harness connector and
ground.

OK or NG

OK

>> GO TO 18.

NG

>> 1. Repair harness between ICC unit and ICC brake hold relay.

2. Erase DTC and perform ICC system running test. Then, perform self-diagnosis of ICC system

again.

ICC unit

connector

Terminal

(

−

)

Condition

Voltage

(Approx.)

(+)

B244

47

Ground

During “ACTIVE TEST”

12 V

SKIA3075E

ICC brake hold relay con-

nector

Terminal

(

−

)

Voltage

(Approx.)

(+)

E38

6

Ground

Battery voltage

SKIA1198E

ICC unit

connector

Terminal

ICC brake hold

relay connector

Terminal

Continuity

B244

38

E38

7

Yes

ICC unit

connector

Terminal

Ground

Continuity

B244

38

No

SKIA1199E

ACS-62

[ICC]

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS

18.

CHECK ICC BRAKE HOLD RELAY

With CONSULT-II

1.

Connect ICC unit connector and ICC brake hold relay.

2.

Disconnect stop lamp switch connector.

3.

Perform “ACTIVE TEST” (“STOP LAMP”) with CONSULT-II, and make sure that stop lamp is illuminated.

OK or NG

OK

>> GO TO 19.

NG

>> 1. Replace ICC brake hold relay.

2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system

again.

19.

CHECK ICC UNIT STANDARD VOLTAGE

With CONSULT-II

1.

Connect stop lamp switch connector.

2.

Perform “ACTIVE TEST” (“STOP LAMP”:“STP LMP DRIVE
ON”) with CONSULT-II, and check voltage between ICC unit
harness connector and ground.

OK or NG

OK

>> 1. Replace ICC unit.

2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system

again.

NG

>> 1. Replace stop lamp switch.

2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system

again.

DTC 92 ECM CIRCUIT

NKS001KS

1.

PERFORM ICC UNIT SELF-DIAGNOSIS

With CONSULT-II

1.

Perform self-diagnosis.

2.

Check if “DTC 20 CAN COMM CIRCUIT” other than “DTC 92 ECM CIRCUIT” is indicated in self-diagnosis
item in the display.

Is it indicated?

YES

>> 1. Repair or replace applicable item.

2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system

again.

NO

>> GO TO 2.

Terminals

Condition

Voltage

(Approx.)

(+)

ICC unit

connector

Terminal

(

−

)

B244

29

Ground

During “ACTIVE

TEST”

0 V

SKIA1200E

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS

ACS-63

[ICC]

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ACS

2.

PERFORM ECM SELF-DIAGNOSIS

With CONSULT-II

1.

Perform ECM self-diagnosis.

2.

Check if malfunction is indicated.

Is malfunction indicated?

YES

>> 1. Repair or replace applicable item.

2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system

again.

NO

>> 1. Replace ICC unit.

2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system

again.

DTC 96 NP RANGE

NKS001KT

1.

CHECK CONNECTOR FOR ICC UNIT

1.

Turn ignition switch OFF.

2.

Disconnect ICC unit connector, and connect it securely again.

3.

Erase DTC and then perform ICC system running test. Then perform self-diagnosis of ICC system again.

Is malfunction indicated?

YES

>> GO TO 2.

NO

>> Poor connector connection

1. Check connector. (Check connector housing for disconnected, loose, bent, and collapsed ter-

minals. If any malfunction is detected, repair applicable part.)

2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system

again.

2.

CHECK NP RANGE SWITCH SIGNAL

With CONSULT-II

With “ICC” “DATA MONITOR”, check if “NP RANGE SW” operates normally. Refer to

ACS-34, "DATA MONI-

TOR"

.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 3.

ACS-64

[ICC]

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS

3.

CHECK HARNESS BETWEEN ICC UNIT AND A/T ASSEMBLY

1.

Turn ignition switch OFF.

2.

Disconnect ICC unit harness connector and A/T assembly har-
ness connector.

3.

Check continuity between ICC unit harness connector and A/T
assembly harness connector.

4.

Check continuity between ICC unit harness connector and
ground.

OK or NG

OK

>> GO TO 4.

NG

>> 1. Repair harness between ICC unit and A/T assembly.

2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system

again.

4.

CHECK TCM START SIGNAL CIRCUIT

Check TCM start signal. Refer to

AT-102, "DTC P0615 START SIGNAL CIRCUIT"

.

OK or NG

OK

>> 1. Replace ICC unit.

2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system

again.

NG

>> 1. Repair or replace damaged parts.

2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system

again.

5.

CHECK SHIFT POSITION SIGNAL

With CONSULT-II

With TCM diagnosis, check if shift operates normally. Refer to

AT-107, "DTC P0705 PARK/NEUTRAL POSI-

TION SWITCH"

.

OK or NG

OK

>> 1. Replace ICC unit.

2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system

again.

NG

>> 1. Perform TCM self-diagnosis.

2. After repairing or replacing applicable item, erase DTC and perform ICC system running test.

Then perform self-diagnosis of ICC system again.

ICC unit

connector

Terminal

A/T assembly

connector

Terminal

Continuity

B243

7

F26

9

Yes

ICC unit

connector

Terminal

Ground

Continuity

B243

7

No

PKIB1447E