Nissan Quest E52. Manual - part 302

DAS-50

< DTC/CIRCUIT DIAGNOSIS >

[BSW]

C1B54 SIDE RADAR LEFT MALFUNCTION

C1B54 SIDE RADAR LEFT MALFUNCTION

DTC Logic

INFOID:0000000009940707

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start the engine.

2.

Turn the BSW system ON.

3.

Perform “All DTC Reading” with CONSULT.

4.

Check if the “C1B54” is detected as the current malfunction in “Self Diagnostic Result” of “BSW”.

Is “C1B54” detected as the current malfunction?

YES

>> Refer to 

DAS-50, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-42, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000009940708

1.

CHECK SELF-DIAGNOSIS RESULTS

Check if “U1000” is detected other than “C1B54” in “Self Diagnostic Result” of “BSW”. 

Is “U1000” detected?

YES

>> Perform the CAN communication system inspection. Repair or replace the malfunctioning parts.

Refer to 

DAS-53, "BSW CONTROL MODULE : DTC Logic"

. 

NO

>> GO TO 2.

2.

CHECK SELF-DIAGNOSIS RESULTS

Check if any DTC is detected in “Self Diagnostic Result” of “SIDE RADAR LEFT”. 

Is any DTC detected?

YES

>> Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to

DAS-26, "DTC Index"

 (SIDE RADAR LEFT).

NO

>> Replace the BSW control module. Refer to 

DAS-84, "Removal and Installation"

.

DTC

Trouble diagnosis name

DTC detecting condition

Possible cause

C1B54

SIDE RDR L MALF

BSW control module detects that side radar LH 
has a malfunction.

Side radar LH

DAS

C1B55 RADAR BLOCKAGE

DAS-51

< DTC/CIRCUIT DIAGNOSIS >

[BSW]

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C1B55 RADAR BLOCKAGE

DTC Logic

INFOID:0000000009940709

DTC DETECTION LOGIC

NOTE:
DTC “C1B55” may be detected under the following conditions except for possible cause. (Explain to the cus-
tomer about the difference between the contamination detection function and the indication when the malfunc-
tion is detected and tell them “This is not malfunction”.)
• The side radar may be blocked by temporary ambient conditions such as splashing water, mist or fog. 
• The blocked condition may also be caused by objects such as ice, frost or dirt obstructing the side radar.
• Due to the nature of radar technology it is possible to get a blockage warning and not actually be blocked.

This is rare and is known as a false blockage warning. A false blocked condition either self-clears or clears
after an ignition cycle.

Diagnosis Procedure

INFOID:0000000009940710

1.

CHECK THE REAR BUMPER

Check rear bumper near the side radar contaminated with foreign materials.

>> GO TO 2.

2.

CHECK THE SIDE RADAR

Check side radar and the side radar outskirts contaminated with foreign materials. 

>> GO TO 3.

3.

CHECK THE SIDE RADAR INSTALL CONDITION

Check side radar installation condition (installation position, properly tightened, a bent bracket).

>> GO TO 4.

4.

INTERVIEW

1.

Ask if there is stain or foreign materials.

2.

Ask if there is any temporary ambient condition such as splashing water, mist or fog.

3.

Ask if there is any object such as ice, frost or dirt obstructing the side radar.

Is any of above conditions seen?

YES

>> Explain to the customer about the difference between the blockage detection function and the

indication when the malfunction is detected and tell them “This is not malfunction”.

NO

>> INSPECTION END

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

C1B55

RADAR BLOCKAGE

Side radar is blocked.

Stain or foreign materials is deposit-
ed.

DAS-52

< DTC/CIRCUIT DIAGNOSIS >

[BSW]

U1000 CAN COMM CIRCUIT

U1000 CAN COMM CIRCUIT

SIDE RADAR LH

SIDE RADAR LH : Description

INFOID:0000000009940711

CAN COMMUNICATION

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Modern
vehicle is equipped with many electronic control units, and each control unit shares information and links with
other control units during operation (not independent). In CAN communication, control units are connected
with 2 communication lines (CAN-H, CAN-L) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads the required data only.
CAN communication signal chart. Refer to 

LAN-32, "CAN COMMUNICATION SYSTEM : CAN Communica-

tion Signal Chart"

.

BSW COMMUNICATION

• BSW communication is a multiplex communication system. This enables the system to transmit and receive

large quantities of data at high speed by connecting control units with 2 communication lines.

• BSW communication lines adopt twisted-pair line style (two lines twisted) for noise immunity.

SIDE RADAR LH : DTC Logic

INFOID:0000000009940712

DTC DETECTION LOGIC

SIDE RADAR LH : Diagnosis Procedure

INFOID:0000000009940713

1.

PERFORM THE SELF-DIAGNOSIS

1.

Start the engine.

2.

Turn the BSW system ON, and then wait for 2 seconds or more. 

3.

Perform “All DTC Reading” with CONSULT. 

4.

Check if the “U1000” is detected as the current malfunction in “Self Diagnostic Result” of “SIDE RADAR
LEFT”. 

Is “U1000” detected as the current malfunction?

YES

>> Refer to 

LAN-17, "Trouble Diagnosis Flow Chart"

. 

NO

>> Refer to 

GI-42, "Intermittent Incident"

. 

SIDE RADAR RH

SIDE RADAR RH : Description

INFOID:0000000009940714

CAN COMMUNICATION

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Modern
vehicle is equipped with many electronic control units, and each control unit shares information and links with
other control units during operation (not independent). In CAN communication, control units are connected
with 2 communication lines (CAN-H, CAN-L) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads the required data only.
CAN communication signal chart. Refer to 

LAN-32, "CAN COMMUNICATION SYSTEM : CAN Communica-

tion Signal Chart"

.

BSW COMMUNICATION

• BSW communication is a multiplex communication system. This enables the system to transmit and receive

large quantities of data at high speed by connecting control units with 2 communication lines.

• BSW communication lines adopt twisted-pair line style (two lines twisted) for noise immunity.

DTC

Trouble diagnosis name

DTC detecting condition

Possible causes

U1000

CAN COMM CIRCUIT

If side radar LH is not transmitting or receiving 
BSW communication signal for 2 seconds or more

BSW communication system

DAS

U1000 CAN COMM CIRCUIT

DAS-53

< DTC/CIRCUIT DIAGNOSIS >

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SIDE RADAR RH : DTC Logic

INFOID:0000000009940715

DTC DETECTION LOGIC

SIDE RADAR RH : Diagnosis Procedure

INFOID:0000000009940716

1.

PERFORM THE SELF-DIAGNOSIS

1.

Start the engine.

2.

Turn the BSW system ON, and then wait for 2 seconds or more. 

3.

Perform “All DTC Reading” with CONSULT. 

4.

Check if the “U1000” is detected as the current malfunction in “Self Diagnostic Result” of “SIDE RADAR
RIGHT”. 

Is “U1000” detected as the current malfunction?

YES

>> Refer to 

LAN-17, "Trouble Diagnosis Flow Chart"

. 

NO

>> Refer to 

GI-42, "Intermittent Incident"

. 

BSW CONTROL MODULE

BSW CONTROL MODULE : Description

INFOID:0000000009940717

CAN COMMUNICATION

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Modern
vehicle is equipped with many electronic control units, and each control unit shares information and links with
other control units during operation (not independent). In CAN communication, control units are connected
with 2 communication lines (CAN-H, CAN-L) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads the required data only.
CAN communication signal chart. Refer to 

LAN-32, "CAN COMMUNICATION SYSTEM : CAN Communica-

tion Signal Chart"

.

BSW COMMUNICATION

• BSW communication is a multiplex communication system. This enables the system to transmit and receive

large quantities of data at high speed by connecting control units with 2 communication lines.

• BSW communication lines adopt twisted-pair line style (two lines twisted) for noise immunity.

BSW CONTROL MODULE : DTC Logic

INFOID:0000000009940718

DTC DETECTION LOGIC

NOTE:
If “U1000” is detected, first diagnose the CAN communication system. 

BSW CONTROL MODULE : Diagnosis Procedure

INFOID:0000000009940719

1.

PERFORM THE SELF-DIAGNOSIS

1.

Turn the ignition switch ON.

2.

Turn the BSW system ON, and then wait for 2 seconds or more. 

3.

Perform “All DTC Reading” with CONSULT. 

4.

Check if the “U1000” is detected as the current malfunction in “Self Diagnostic Result” of “BSW”. 

Is “U1000” detected as the current malfunction?

DTC

Trouble diagnosis name

DTC detecting condition

Possible causes

U1000

CAN COMM CIRCUIT

If Side radar RH is not transmitting or receiving 
BSW communication signal for 2 seconds or more

BSW communication system

DTC

Trouble diagnosis name

DTC detecting condition

Possible causes

U1000

CAN COMM CIRCUIT

If BSW control module is not transmitting or re-
ceiving CAN communication signal or BSW com-
munication signal for 2 seconds or more

• CAN communication system
• BSW communication system