Nissan Altima HL32 Hybrid. Manual - part 684

P1572-904

HBC-485

< COMPONENT DIAGNOSIS >

D

E

F

G

H

I

J

K

L

M

A

B

HBC

N

O

P

>> INSPECTION END

Component Inspection (ASCD Brake Switch)

INFOID:0000000004212087

1.

CHECK ASCD BRAKE SWITCH-I

1. Turn ignition switch OFF.

2. Disconnect ASCD brake switch harness connector.

3. Check the continuity between ASCD brake switch terminals

under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

CHECK ASCD BRAKE SWITCH-II

1. Adjust ASCD brake switch installation. Refer to 

BR-12, "Inspection and Adjustment"

.

2. Check the continuity between ASCD brake switch terminals

under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace ASCD brake switch.

ASCD brake 

switch (A)

Condition

Continuity

Terminals

1 and 2

Brake pedal

Fully released

Existed

Slightly depressed

Not existed

JMCIA0233ZZ

ASCD brake 

switch (A)

Condition

Continuity

Terminals

1 and 2

Brake pedal

Fully released

Existed

Slightly depressed

Not existed

JMCIA0233ZZ

HBC-486

< COMPONENT DIAGNOSIS >

P1606-308

P1606-308

Description

INFOID:0000000004212088

The hybrid vehicle control ECU receives a signal that indicates a collision from the ACU (Air bag diagnosis

sensor unit) to detect a collision. After detecting a collision, the hybrid vehicle control ECU shuts off the high-

voltage systems for safety.

DTC Logic

INFOID:0000000004212089

DTC DETECTION LOGIC

NOTE:

If P1608-308 is detected, the vehicle cannot start unless the DTC is cleared using CONSULT-III.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC confirmation procedure has been previously conducted, always turn ignition switch OFF and wait at

least 10 seconds before conducting the next test.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON and wait at least 5 seconds.

2. Check DTC.
Is DTC detected?

YES

>> Go to 

HBC-486, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000004212090

1.

PRECONDITIONING

• Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with

converter assembly, take safety precautions such as wearing insulated gloves and removing the service

plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent

other technicians from accidentally reconnecting it while you are working on the high-voltage system.

• After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage

connectors or terminals.

• Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with

converter assembly.

>> GO TO 2.

2.

CHECK DTC OUTPUT (HYBRID SYSTEM)

1. Turn ignition switch ON.

2. Check DTC.

A or B

A

>> Go to inspection procedure relevant to output DTC. (P0A1D)

B

>> GO  TO  3.

DTC No.

INF code

Trouble diagnosis name

DTC detecting condition

Possible cause

P1606

308

Collision detection

Shutoff signal from the ACU is 
determined.

• ACU
• Hybrid vehicle control ECU

DTC No.

Proceed to

P1606 and P0A1D are output.

A

P1606 only is output.

B

P1606-308

HBC-487

< COMPONENT DIAGNOSIS >

D

E

F

G

H

I

J

K

L

M

A

B

HBC

N

O

P

3.

CHECK SUPPLEMENTAL RESTRAINT SYSTEM

Troubleshoot the air bag system.

YES or NO

YES

>> Repair or replace malfunctioning parts, component and area.

NO

>> Replace ACU.

Result: There is a malfunction.

HBC-488

< COMPONENT DIAGNOSIS >

P1805-902

P1805-902

Description

INFOID:0000000004212091

Brake switch signal is applied to the hybrid vehicle control ECU through the stop lamp switch when the brake

pedal is depressed. This signal is used mainly for the ASCD function and regenerative brake control.

DTC Logic

INFOID:0000000004212092

DTC DETECTION LOGIC

Component Function Check

INFOID:0000000004212093

1.

CHECK FOR STOP LAMP SWITCH FUNCTION

 With CONSULT-III

1. Turn ignition switch ON.

2. Select “BRAKE SWITCH” in “DATA MONITOR” mode with CONSULT-III.

3. Check “BRAKE SWITCH” indication under the following conditions.

 With GST

1. Turn ignition switch ON.

2. Check the voltage between hybrid vehicle control ECU harness connector and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

HBC-488, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000004212094

1.

PRECONDITIONING

• Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with

converter assembly, take safety precautions such as wearing insulated gloves and removing the service

plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent

other technicians from accidentally reconnecting it while you are working on the high-voltage system.

• After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage

connectors or terminals.

• Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with

converter assembly.

>> GO TO 2.

DTC No.

INF code

Trouble diagnosis name

DTC detecting condition

Possible cause

P1805

902

Brake switch

A stop lamp switch signal is not sent to the 
hybrid vehicle control ECU for extremely 
long time while the vehicle is driving.

• Harness or connectors

(Stop lamp switch circuit is open or 
shorted.)

• Stop lamp switch
• Stop lamp switch installation

Monitor item

Condition

Indication

BRAKE SWITCH

Brake pedal

Slightly depressed

ON

Fully released

OFF

Hybrid vehicle control ECU

Ground

Condition

Voltage

Harness 

connector

Terminal

E66

148 (Stop lamp switch signal)

Ground

Brake pedal

Slightly depressed

Battery voltage

Fully released

Approx. 0V