Infiniti QX56 (Z62). Manual - part 1367

LOW TIRE PRESSURE WARNING CONTROL UNIT

WT-15

< ECU DIAGNOSIS INFORMATION >

C

D

F

G

H

I

J

K

L

M

A

B

WT

N

O

P

Terminal No.

(Wire color)

Description

Condition

Value (Approx.)

Signal name

Input/

Output

1

(P)

—

CAN-L

Input/

Output

—

—

2

(L)

—

CAN-H

Input/

Output

—

—

3

(O/L)

Ground

Tire pressure receiver rear 
RH signal

Input

Ignition switch ON

Standby status

Approx. 4.5 V

When signal is 
received

Approx. 4.5 V

4

(L)

Ground

Tire pressure receiver rear 
LH signal

Input

Ignition switch ON

Standby status

Approx. 4.5 V

When signal is 
received

Approx. 4.5 V

OCC3879D

OCC3880D

OCC3879D

OCC3880D

WT-16

< ECU DIAGNOSIS INFORMATION >

LOW TIRE PRESSURE WARNING CONTROL UNIT

5

(R/L)

Ground

Tire pressure receiver front 
RH signal

Input

Ignition switch ON

Standby status

Approx. 4.5 V

When signal is 
received

Approx. 4.5 V

6

(W/G)

Ground

Tire pressure receiver front 
LH signal

Input

Ignition switch ON

Standby status

Approx. 4.5 V

When signal is 
received

Approx. 4.5 V

7

(SB)

Ground

Tire pressure receiver rear 
RH power supply*

Output

Ignition switch ON

Approx. 9 - 16 V

Ignition switch OFF

0 V

8

(GR)

Ground

Tire pressure receiver rear 
LH power supply*

Output

Ignition switch ON

Approx. 9 - 16 V

Ignition switch OFF

0 V

9

(R/W)

Ground

Tire pressure receiver front 
RH power supply*

Output

Ignition switch ON

Approx. 9 - 16 V

Ignition switch OFF

0 V

10

(LG)

Ground

Tire pressure receiver front 
LH power supply*

Output

Ignition switch ON

Approx. 9 - 16 V

Ignition switch OFF

0 V

15

(GR)

Ground

Power supply

Input

Ignition switch ON

Battery voltage

Ignition switch OFF

0 V

19

(L/R)

Ground

Tire pressure receiver rear 
RH signal (sensitivity)

Input

Ignition switch ON

Approx. 0.7 V

Ignition switch OFF

0 V

20

(P)

Ground

Tire pressure receiver rear 
LH signal (sensitivity)

Input

Ignition switch ON

Approx. 0.7 V

Ignition switch OFF

0 V

Terminal No.

(Wire color)

Description

Condition

Value (Approx.)

Signal name

Input/

Output

OCC3879D

OCC3880D

OCC3879D

OCC3880D

LOW TIRE PRESSURE WARNING CONTROL UNIT

WT-17

< ECU DIAGNOSIS INFORMATION >

C

D

F

G

H

I

J

K

L

M

A

B

WT

N

O

P

*: Power is supplied to the tire pressure receiver from the low tire pressure warning control unit.

DTC Inspection Priority Chart

INFOID:0000000006225498

If some DTCs are displayed at the same time, perform inspections one by one based on the following priority-
chart.

21

(G/R)

Ground

Tire pressure receiver front 
RH signal (sensitivity)

Input

Ignition switch ON

Approx. 0.7 V

Ignition switch OFF

0 V

22

(BR/Y)

Ground

Tire pressure receiver front 
LH signal (sensitivity)

Input

Ignition switch ON

Approx. 0.7 V

Ignition switch OFF

0 V

23

(V/W)

Ground

Tire pressure receiver rear 
RH ground

Input

Always

0 V

24

(R/B)

Ground

Tire pressure receiver rear 
LH ground

Input

Always

0 V

25

(W/L)

Ground

Tire pressure receiver front 
RH ground

Input

Always

0 V

26

(BR/W)

Ground

Tire pressure receiver front 
LH ground

Input

Always

0 V

32

(B)

Ground

Ground

—

Always

0 V

Terminal No.

(Wire color)

Description

Condition

Value (Approx.)

Signal name

Input/

Output

Priority

Detected items (DTC)

1

• U1000 CAN COMM CIRCUIT
• U1010 CONTROL UNIT (CAN)

2

• C1704 LOW PRESSURE FL
• C1705 LOW PRESSURE FR
• C1706 LOW PRESSURE RR
• C1707 LOW PRESSURE RL

3

• C1755 PR RECEIV COND FL
• C1756 PR RECEIV COND FR
• C1757 PR RECEIV COND RR
• C1758 PR RECEIV COND RL

4

• C1708 [NO DATA] FL
• C1709 [NO DATA] FR
• C1710 [NO DATA] RR
• C1711 [NO DATA] RL

5

• C1716 [PRESSDATA ERR] FL
• C1717 [PRESSDATA ERR] FR
• C1718 [PRESSDATA ERR] RR
• C1719 [PRESSDATA ERR] RL

7

• C1728 RECEIVER ID NO REG

8

• C1729 VHCL SPEED SIG ERR

9

• C1750 [RECEIVER ERR] FL
• C1751 [RECEIVER ERR] FR
• C1752 [RECEIVER ERR] RR
• C1753 [RECEIVER ERR] RL

10

• C1754 CONT UNIT (EEPROM)

WT-18

< ECU DIAGNOSIS INFORMATION >

LOW TIRE PRESSURE WARNING CONTROL UNIT

DTC Index

INFOID:0000000006225499

NOTE:
If some DTCs are displayed at the same time, refer to 

WT-17, "DTC Inspection Priority Chart"

.

DTC

Items (CONSULT-III screen terms)

Reference

C1704

LOW PRESSURE FL

WT-31, "DTC Logic"

C1705

LOW PRESSURE FR

C1706

LOW PRESSURE RR

C1707

LOW PRESSURE RL

C1708

[NO DATA] FL

WT-33, "DTC Logic"

C1709

[NO DATA] FR

C1710

[NO DATA] RR

C1711

[NO DATA] RL

C1716

[PRESSDATA ERR] FL

WT-37, "DTC Logic"

C1717

[PRESSDATA ERR] FR

C1718

[PRESSDATA ERR] RR

C1719

[PRESSDATA ERR] RL

C1728

RECEIVER ID NO REG

WT-39, "DTC Logic"

C1729

VHCL SPEED SIG ERR

WT-41, "DTC Logic"

C1750

[RECEIVER ERR] FL

WT-42, "DTC Logic"

C1751

[RECEIVER ERR] FR

C1752

[RECEIVER ERR] RR

C1753

[RECEIVER ERR] RL

C1754

CONT UNIT (EEPROM)

WT-45, "DTC Logic"

C1755

PR RECEIV COND FL

WT-47, "DTC Logic"

C1756

PR RECEIV COND FR

C1757

PR RECEIV COND RR

C1758

PR RECEIV COND RL

U1000

CAN COMM CIRCUIT

WT-49, "DTC Logic"

U1010

CONTROL UNIT (CAN)

WT-50, "DTC Logic"