SERVICE MANUAL
INFORMATION

Group:
Bulletin No:
Issue Date:

SERVICE MANUAL UPDATE
SB-15-044
11-17-2015

Subject: CORRECTION OF WORKSHOP MANUAL FOR HINO CONVENTIONAL
Revision of Troubleshooting Procedure for P2214
RELEVANT MODEL: 15MY-16MY Conventional Trucks
The following is to inform you of the above caption. This service data should be attached to the
relevant pages of the workshop manuals for maintenance and to use for servicing.
OVERVIEW:

In the event that a vehicle exhibits a P2214, an update is available to the current published
diagnostic troubleshooting work procedure.
*All changes will be reflected in the 17MY Conventional Workshop Manual as well.
REVISED DIAGNOSTIC PROCEDURE
Inspect the NOx Sensor
Step 4(upstream) and Step 5(downstream) P2214

ENGINE CONTROL SYSTEM (J08E)

4–953

DTC: P2214
EN01H16F01030F03001155

P2214: NOx sensor (SCR downstream) - Performance and Monitoring capability
INFORMATION

LE9
H
(CANH)
LE8 L
(CANL)

%JS
(CA2H)
%JX
(CA2L)

LED H
(CANH)
LEC L
(CANL)

Twist

%JW
(CA2L)

#PH
#AR #PH

#PG
#AQ #PG

#AR

Twist

NOx
sensor 1

#AQ

(ER+)

(ER-)
%JZ
(CA2L)

External
resistance
%JR
(CA2H)

L

Ambient air
temperature
sensor

A99
(3GLD)
A8V
(6BLD)

(VCC)
(GND)
(GND)

NOx
sensor 2

H
LEM

DEF sensor
(DEF tank
temperature
sensor)

%NH %NH

Twist

#CQ #CQ

L

Twist
Twist

%KE
(CA3L)

(CANL)
LEJ

L

(CA3L)
%KN

#AU #AU

#SD #SD
#SF #SF

(CANH)
LEK

L
&1D
(G4-A)
(CANL)

K6V

ECU

K6W

Twist

L

(CANH)

(CA1L) LCN #S7 #S7

H

%KM
(CA3H)

#AV #AV

#AW #AW
H

(CA1H) LCM #S5 #S5

E23 K0U

(WTM-)

(WTM+)

H

E24

E23

#CP #CP

Twist

(THW+) K0U

KTQ
(AFSG)
KTQ LCH

(AG4)

(AFSI)

LCH

KTS

KTR

(AFVB)

(AFGD)

KTS L75

KTR L2P
L2P

L75

(AFT-)
(AG5)

(AFVB)

KTT

KTU

(AFT+)
KTT K0W

KTU KTD

Common rail_
CAN_J/C1

(CA3H)
%KP

%KL
(CA3L)

%KF
(CA3H)

Twist

KTD

K0W

(CA2H) %JU

Twist

Twist

H

LQU

FUSE NOx1

Air flow sensor

(THA+)

(GND2)

(TEX2)
KSG

KSH
(AGD9)

LCT

LGK (HH1-)

Common rail_
CAN_J/C3

Exhaust gas
temperature
sensor 4

LCG

(ATS-) LNN
LQV

Engine
coolant
temperature
sensor 1

(ET4+)

FUSE NOx2

%JQ (12)
%JV
(CA2L)

L

H

LGJ (HH1+)

Twist

LF5 (CAH1)

Exhaust gas
temperature
sensor
(SCR inlet)

DCU

(EXT-)

(ATSS) LNM

LEY (CAH0)
LEZ (CAL0)

LFH

(EXT+)

LF4 (TE2B)
LF3 (TE2A)

LE5

LFG

LF2 (TE1B)
LF1 (TE1A)

(FAT-)

LE4

LF6 (CAL1)

(FAT+)

Z30
(G4C)
BATTERY GND
SAPH16F010300920

1.

Technical description

• NOx sensor 2 (SCR downstream) confirms correct value by comparing with the actual NOx sensor 1 (SCR
upstream) value, the NOx sensor 2 (SCR down stream) value and the NOx model value calculated by the ECU.
• NOx model value is calculated according to the engine's state and properties.

• Characteristics failure of NOx sensor 2 (SCR downstream) is detected.

4–954
2.

DTC set condition
(1) DTC detection condition

(2)

3.

ENGINE CONTROL SYSTEM (J08E)

• DPF active regeneration in process
• SCR catalyst temperature (from DCU) • 440 qC {824 qF} for 100 sec
• DPF upstream temperature • 400 qC {752 qF}
• 75 kPa ” Barometric pressure ” 112 kPa
• -7 qC {19.4 qF} ” Intake air temperature (build-in air flow sensor) ” 49 qC {120 qF}
• 55 qC {131 qF} ” Engine coolant temperature ” 100 qC {212 qF}
• NOx sensor (SCR upstream) is valid.
• NOx sensor (SCR downstream) is valid.
After above conditions are met, DEF dosing is stopped.
Cumulative NOx mass flow (calculated NOx) from DEF dosing stop • 5.5 g
Conditions below continue for 5 sec
• 100 ppm ” Calculated NOx (SCR upstream) ” 500 ppm
• |ǻCalculated NOx (SCR upstream)| ” 780 ppm/sec
• 300 kg/h ” Exhaust gas mass flow < 1,000 kg/h
• Fuel injection quantity • 5 mm3/st
Judgement criteria
All of the three conditions described below are formed. (judgement time : 10 sec)
• Average actual NOx (from NOx sensor 1 (SCR upstream)) – Average calculated NOx (SCR upstream)
: Within range
• Average Actual NOx (from NOx sensor 2 (SCR downstream)) – Average calculated NOx (SCR upstream)
: Out of range
• Average Actual NOx (from NOx sensor 2 (SCR downstream)) – Average actual NOx (from NOx sensor 1
(SCR upstream))
: Out of range

Reset condition

• After normal operation is restored.
4.

Indication, warning or system control regulation when the DTC is set.

•
•
•
•
5.

MIL: ON
SVS light: OFF
DEF injection is stopped.
NOx purification function is stopped.

Symptoms on the vehicle when the DTC is set

• Exhaust gas purification function has deteriorated.

• –
6.

Pre-inspection work

• Check that the battery voltage is in the normal range.
7.

After-inspection work

• Clear all past DTCs.
• After starting the DPR automatic regeneration, form the DTC detection condition.
• Check that no DTC is detected after test drive.

ENGINE CONTROL SYSTEM (J08E)
8.

Estimated failure factors

• Harness disconnection or short-circuit
• Failure of NOx sensor 1 (SCR upstream)
• NOx sensor 2 (SCR downstream) failure
- Sensor internal circuit failure
- NOx sensor controller failure
• Failure of sensor used in calculating model value:
- Air flow sensor
- Boost pressure sensor
- Intake manifold temperature sensor
- Engine coolant temperature sensor
- EGR failure

4–955

4–956

ENGINE CONTROL SYSTEM (J08E)

INSPECTION PROCEDURE: P2214
1

Check the DTC detected [HINO DX ൖ ]
1.

Set the starter switch to the "LOCK" position.

2.

Connect the diagnostic system (HINO DX ൖ ) to the vehicle.

3.

Set the starter switch to the "ON" position.

4.

Select [Engine] on the screen of HINO DX ൖ and check it the DTC
P2214 has been detected.

SAPH16F010300921

Has any DTC related to P2214 been detected?
YES

NO

Go to diagnosis procedure of the related
DTC.
After repair, go to step 2.

2

Go to step 2.

Inspect the DEF
1.

Check the DEF concentration.
Standard values

31.8 – 33.2 % (DEF value (Brand new))

Are the measurements excessively different?
YES
If the DEF concentration is excessively different from the reference value, replace the
DEF. Leave the starter switch to the "ON"
position, drain the DEF through the tank
drain, and then refill the tank with at least 5
liters {1.3 gallons} of DEF.
Afterward, drive the vehicle and confirm that
the problem does not recur under driving
conditions. Perform "After-inspection work"
of INFORMATION section.
NOTICE
When changing the DEF, place (leave) the
starter switch to the "ON" position.