Infiniti I30 (A33). Manual — part 142

10. TCS OFF Switch Is Inoperative

=NHBR0090

1

INSPECTION START

Inspect TCS OFF switch.

SBR543E

©

GO TO 2.

2

CHECK TCS OFF SWITCH

1. Remove TCS OFF switch and disconnect TCS OFF switch connector.
2. Check continuity between terminal 2 and 3 for TCS OFF switch connector.

SBR544E

When TCS OFF switch is pressed:

Continuity should exist.

When TCS OFF switch is released:

Continuity should not exist.

OK

©

GO TO 3.

NG

©

Replace TCS OFF switch.

GI

MA

EM

LC

EC

FE

AT

AX

SU

ST

RS

BT

HA

SC

EL

IDX

TROUBLE DIAGNOSES FOR SYMPTOMS

TCS

10. TCS OFF Switch Is Inoperative

BR-151

3

CHECK TCS OFF SWITCH POWER SUPPLY CIRCUIT

I

Disconnect connector from control unit.

I

Check continuity between control unit connector terminal 44 and TCS OFF switch connector terminal 2.

SBR545E

Does continuity exist?

Yes

©

GO TO 4.

No

©

Check the following.

I

Harness connectors E91, M45

I

Harness for open or short between TCS OFF switch terminal (body side) and control
unit
If NG, repair harness or connectors.

4

CHECK TCS OFF SWITCH POWER SUPPLY

Check continuity between TCS OFF switch connector terminal 2 and ground.

SBR546E

Does continuity exist?

Yes

©

GO TO 5.

No

©

Repair harness and connectors.

TROUBLE DIAGNOSES FOR SYMPTOMS

TCS

10. TCS OFF Switch Is Inoperative (Cont’d)

BR-152

5

CHECK TCS OFF SWITCH GROUND CIRCUIT

Check continuity between TCS OFF switch connector terminal 3 and ground.

SBR547E

Does continuity exist?

Yes

©

Final check

No

©

Repair harness and connectors.

GI

MA

EM

LC

EC

FE

AT

AX

SU

ST

RS

BT

HA

SC

EL

IDX

TROUBLE DIAGNOSES FOR SYMPTOMS

TCS

10. TCS OFF Switch Is Inoperative (Cont’d)

BR-153

11. Poor Acceleration

=NHBR0091

1

INSPECTION START

Engine acceleration is poor while TCS is operating. Vehicle instability is caused by unstable engine rpm operation. (Engine
is shaking.)

©

GO TO 2.

2

CHECK PERFORMANCE

1. Cancel TCS operation using TCS OFF switch. (TCS OFF indicator lamp lights.)
2. Drive vehicle or accelerate engine.

Is engine acceleration poor or does automatic transaxle shift when TCS is not operating?

Yes

©

Go to “TROUBLE DIAGNOSES” in BR section.

No

©

GO TO 3.

3

CHECK SELF-DIAGNOSIS

Perform self-diagnostic procedures for TCM.

Does any of the following self-diagnostic items appear on the display?

Yes

©

Go to “TROUBLE DIAGNOSES” in AT section.

No

©

GO TO 4.

4

CHECK SELF-DIAGNOSIS

Perform self-diagnostic procedures for ABS/TCS.

Does any of the following self-diagnostic items appear on the display?

Yes

©

Go to “TROUBLE DIAGNOSES” in BR section.

No

©

GO TO 5.

5

CHECK SELF-DIAGNOSIS

Perform self-diagnostic procedures for ECM.

Does any of the following self-diagnostic items appear on the display?

Yes

©

Go to “TROUBLE DIAGNOSES” in EC section.

No

©

INSPECTION END

TROUBLE DIAGNOSES FOR SYMPTOMS

TCS

11. Poor Acceleration

BR-154