Nissan Altima HL32 Hybrid. Manual - part 993

B2193, P1612 CHAIN OF ECM-IMMU

SEC-45

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

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B2193, P1612 CHAIN OF ECM-IMMU

Description

INFOID:0000000004215993

BCM performs the ID verification with hybrid vehicle control ECU that allows the hybrid system to start. Start

the hybrid system if the ID is OK. Hybrid vehicle control ECU prevents the hybrid system from starting if the ID

is not registered. BCM starts the communication with hybrid vehicle control ECU if ignition switch is turned ON.

DTC Logic

INFOID:0000000004215994

DTC DETECTION LOGIC

NOTE:

• If DTC B2193 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

SEC-28, "DTC Logic"

.

• If DTC B2193 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to

SEC-29, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON under the following conditions.

-

ECVT selector lever is in the P or N position.

-

Do not depress brake pedal.

2. Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?

YES

>> Refer to 

SEC-45, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000004215995

1.

REPLACE BCM

1. Replace BCM. Refer to 

BCS-87, "Removal and Installation"

.

2. Perform initialization with CONSULT-III.

For initialization, refer to “CONSULT-III Operation Manual”.

Does the hybrid system start?

YES

>> BCM is malfunctioning.

• Replace BCM. Refer to 

BCS-87, "Removal and Installation"

.

• Perform initialization again and delete the DTC of hybrid vehicle control ECU.

NO

>> Hybrid vehicle control ECU is malfunctioning.

• Replace hybrid vehicle control ECU.

• Perform re-communicating function.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2193

CHAIN OF ECM-
IMMU

Inactive communication between hybrid vehicle 
control ECU and BCM

• Harness or connectors

(The CAN communication line is 
open or shorted)

• BCM 
• hybrid vehicle control ECU

P1612

SEC-46

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

B2555 STOP LAMP

B2555 STOP LAMP

Description

INFOID:0000000004216002

BCM detects the stop lamp status and confirms the stop lamp switch ON/OFF status. BCM confirms the

engine start condition according to the stop lamp switch ON/OFF status.

DTC Logic

INFOID:0000000004216003

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Depress the brake pedal and wait for at least 1 second.

2. Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?

YES

>> Refer to 

SEC-46, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000004216004

1.

CHECK STOP LAMP SWITCH INPUT SIGNAL

1. Turn ignition switch OFF.

2. Disconnect BCM harness connector.

3. Check voltage between BCM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2

NO

>> GO TO 3

2.

CHECK BCM INPUT SIGNAL

Check voltage between BCM harness connector M18 terminal 24

and ground.

Is the inspection result normal?

YES

>> Stop lamp switch circuit is OK.

NO

>> Repair harness or fuse.

3.

CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT

DTC No.

Trouble diagno-

sis name

DTC detecting condition

Possible cause

B2555

STOP LAMP

BCM makes a comparison between the 
upper voltage and lower voltage of stop 
lamp switch. It judges from their values to 
detect the malfunctioning circuit.

• Harness or connectors

(stop lamp switch circuit is open or shorted)

• Stop lamp switch
• Fuse

BCM

Ground

Stop lamp 

switch position

Voltage [V]

Connector

Terminal

M18

26

Ground

Depressed

Battery volt-

age

Released

0

ALKIA0437ZZ

BCM

Ground

Voltage [V]

Connector

Terminal

M18

24

Ground

Battery voltage

ALKIA1437ZZ

B2555 STOP LAMP

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1. Disconnect stop lamp switch harness connector.

2. Check voltage between stop lamp harness connector and

ground.

Is the inspection result normal?

YES

>> GO TO 4

NO

>> Check harness for open or short between stop lamp

switch and fuse.

4.

CHECK STOP LAMP SWITCH CIRCUIT

1. Check continuity between stop lamp switch harness connector

E38 (A) terminal 2 and BCM harness connector M18 (B) termi-

nal 26.

2. Check continuity between stop lamp switch harness connector

E38 (A) terminal 2 and ground.

Is the inspection result normal?

YES

>> GO TO 5

NO

>> Repair harness or connector.

5.

CHECK STOP LAMP SWITCH

Refer to 

SEC-47, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 6

NO

>> Replace stop lamp switch.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-42, "Intermittent Incident"

.

>> Inspection End.

Component Inspection

INFOID:0000000004216005

1.

CHECK STOP LAMP SWITCH

1. Turn ignition switch OFF.

2. Disconnect stop lamp switch harness connector.

Stop lamp switch

Ground

Voltage [V]

Connector

Terminal

E38

1

Ground

Battery voltage

ALKIA0438ZZ

Stop lamp switch

BCM

Continuity

Connector

Terminal

Connector

Terminal

A: E38

2

B: M18

26

Yes

Stop lamp switch

Ground

Continuity

Connector

Terminal

A: E38

2

Ground

No

ALKIA0439ZZ

SEC-48

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

B2555 STOP LAMP

3. Check continuity between stop lamp switch terminals under the

following conditions.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace stop lamp switch.

ALKIA0440ZZ

Stop lamp switch

Condition

Continuity

Terminal

1

2

Brake pedal

Not depressed

No

Depressed

Yes