Nissan Primera P11. Instruction — part 108

YEC103A

TROUBLE DIAGNOSES 17

CD20T

Brake Switch (Cont’d)

EC-137

INSPECTION START

(RDNT brake switch)

CHECK POWER SUPPLY.
1. Turn ignition switch to “LOCK” posi-

tion.

2. Disconnect RDNT brake switch har-

ness connector.

3. Turn ignition switch to “ON” position.
4. Check voltage between RDNT brake

switch harness connector terminal

p

1

and body ground.

Voltage: Battery voltage

OK

E

NG

Check the following:

●

Harness connectors

F104

,

M50

(RHD models)

●

Harness connectors

F2

,

E43

(LHD models)

●

Harness for open or
short-circuit between
RDNT brake switch
harness connector ter-
minal

p

1

and ECM

connector terminal

416

.

If NG, repair harness or
connectors.

CHECK GROUND CIRCUIT.
1. Turn ignition switch to “LOCK” posi-

tion.

2. Check harness continuity between

RDNT brake switch harness connec-
tor terminal

p

2

and body ground.

Continuity should exist.

If OK, check harness for short-
circuit.

OK

E

NG

Repair harness or con-
nectors.

CHECK COMPONENT.
(RDNT brake switch)
Refer to “COMPONENT INSPECTION”
on next page.

OK

Disconnect and reconnect harness
connectors in the circuit. Then retest.

Trouble is not fixed

Check ECM pin terminals for damage
and check the connection of ECM har-
ness connector. Reconnect ECM har-
ness connector and retest.

INSPECTION END

YEC377

RDNT brake switch
harness connector

YEC378

RDNT brake switch
harness connector

H

H

H

H

H

H

TROUBLE DIAGNOSES 17

CD20T

Brake Switch (Cont’d)

EC-138

COMPONENT INSPECTION

Stop lamp switch and RDNT brake switch

1. Turn ignition switch to “LOCK” position.
2. Disconnect switch harness connectors.
3. Check continuity between terminals

p

1

and

p

2

.

Continuity:

Brake pedal

Stop lamp switch

RDNT brake switch

Released

No

No

Depressed

Yes

Yes

If NG, replace stop lamp switch or RDNT brake switch.

1 2

1

2

YEC379

TROUBLE DIAGNOSES 17

CD20T

Brake Switch (Cont’d)

EC-139

ECM Relay

The ECM Relay shuts off the main power supply to the ECM
within 5 seconds after the ignition switch has turned to the
“LOCK” position.

Malfunction is detected when .

Check Items

(Possible cause)

●

ECM relay shut-off time is too late.

●

Harness or connectors
(The ECM relay circuit is shorted).

●

ECM relay

●

ECM

DIAGNOSTIC TROUBLE CONFIRMATION
PROCEDURE

1)

Turn ignition switch to the “ON” position and select
“DATA MONITOR” mode with CONSULT-II.

2)

Turn ignition switch to the “LOCK” position and wait
at least 5 seconds.

3)

Turn ignition switch to the “ON” position and wait at
least 2 seconds.

DIAGNOSTIC PROCEDURE

Refer to “Trouble Diagnosis for Power Supply” (EC-CD-59) for
ECM relay circuit inspection.

TROUBLE DIAGNOSES 18

CD20T

EC-140