1. Set the starter switch to the "LOCK" position.
2. Connect the vehicle to Hino-DX.
3. Set the starter switch to the "ON" position.
4. Select [Engine] and check if any DTC other than P200C (for exam- ple P2470, P2471) has been detected in [Fault Information].
HINT
Due to sensor failures or for other reasons, P200C may have been detected.
First perform the diagnostics related to the other DTCs, such as sensors and engine related DTCs (Refer to "Estimated failure fac- tors" in the previous pages).
NO YES
1. Check for dirt or soot in the exhaust pipe.
NO YES
1
Check the DTC detected (Engine ECU) [Hino-DX]Select Engine
SAPH16F010300714
Has a DTC other than P200C been detected?
Go to diagnosis procedure of a related DTC. Go to step 2.
2
Inspect the exhaust pipeWas any failure found?
Go to step 3. Go to step 6.
1. Set the starter switch to the "LOCK" position.
2. Replace the DPR filter HINT
When replacing the DPR filter, replace the burner nozzle and clean the igniter.
3. Connect the vehicle to Hino-DX. Select [Engine] then set up [Exhaust Temp. (OUT)] from the [Data Monitor] menu.
4. Perform DPR manual regeneration and measure (monitor) the exhaust gas temperature.
NO YES
Check the injection quantity and the rotational fluctuation.
1. Start the engine.
2. Select [Injection quantity] from the [Data Monitor] menu and mea- sure the injection quantity.
3. Select [Engine speed] from the [Data Monitor] menu and measure the rotational fluctuation.
3
Inspection of the exhaust gas temperature [Hino-DX]Select Engine
SAPH16F010300715
Standard values
Exhaust gas temperature: below 800C {1,472F}
Do the measurements meet the standard value?
Go to step 4. Go to step 10.
4
Inspect the injector [Hino-DX]Engine Ne (r/min)
NE Rotational fluctuation
@1,500 r/min (measurement by Hino-DX) Select
Engine
SAPH16F010300716
Measurement conditions Engine speed: 1,500 r/min No-load,
T/M shift lever: Neutral position, A/C off and Air compressor un-operating.
Engine coolant temperature: more than 80 C {176 F}
Standard values
Type of MT
Allison 2200 Allison 2500
Q (mm3/st) 5.0q
6.0q
Ne (r/min)
26
NO YES
1. Based on the Engine basic inspection sheet, inspect each engine part and system.
HINT
Inspect each engine system and check for anything that may dete- riorate the exhaust gas properties.
NO YES
1. Check the connection of the exhaust gas temperature sensor (DOC outlet) connector (Looseness and poor contact).
NO YES
Do the measurements meet the standard value?
(Both the injection quantity and the rotational fluctuation are within the standard values)
Go to step 5. Replace the injector.
Perform "After-inspection work" of INFOR- MATION section.
5
Perform engine basic inspection [Hino-DX]Select Engine
SAPH16F010300718
Was any failure found?
Repair or replace the faulty part.
Perform "After-inspection work" of INFOR- MATION section.
Procedure completed.
Perform "After-inspection work" of INFOR- MATION section.
6
Inspect the exhaust gas temperature sensor (DOC outlet) connectorWas any failure found?
Connect securely, repair if needed.
Perform "After-inspection work" of INFOR- MATION section.
Go to step 7.
1. Check the installation of the exhaust gas temperature sensor (DOC outlet).
2. Make sure there is no dirt or damage to the exhaust gas tempera- ture sensor (DOC outlet).
NO YES
1. Set the starter switch to the "LOCK" position.
2. Disconnect the exhaust gas temperature sensor (DOC outlet) con- nector.
3. Use the electrical tester to measure the resistance between the terminals of the exhaust gas temperature sensor (DOC outlet).
NO YES
7
Inspect the outside of the exhaust gas temperature sensor (DOC outlet)Was any failure found?
Clean the exhaust gas temperature sensor (DOC outlet) and install it properly.
If damaged, replace the exhaust gas temper- ature sensor (DOC outlet).
Perform "After-inspection work" of INFOR- MATION section.
Go to step 8.
8
Inspect the exhaust gas temperature sensor (DOC outlet) unitGND1 TEX1
SAPH16F010300719
Measurement
conditions Tester connections Standard values Starter switch:
LOCK
Exhaust gas tem- perature sensor (DOC outlet) TEX1 – GND1
50 C {122 F}:
7.4 – 19.6 k
100 C {212 F}:
3.0 – 6.2 k
Do the measurements meet the standard value?
Go to step 9. Replace the exhaust gas temperature sensor
(DOC outlet).
Perform "After-inspection work" of INFOR-
1. Perform DPR manual regeneration.
2. Set the starter switch to the "ON" position.
3. Select [Engine] and check if P200C has been detected in [Fault Information].
NO YES
1. Check the connection of exhaust gas temperature sensor connec- tor (burner outlet) (Looseness and poor contact).
NO YES
9
Check the DTC detected (Engine ECU) [Hino-DX]Select Engine
SAPH16F010300720
Has DTC P200C been detected？
Go to step 3. Procedure completed.
Perform "After-inspection work" of INFOR- MATION section.
10
Inspect the exhaust gas temperature sensor (burner outlet) connectorWas any failure found?
Connect securely. Repair if needed.
Perform "After-inspection work" of INFOR- MATION section.
Go to step 11.
1. Check the installation of the exhaust gas temperature sensor (burner outlet).
2. Make sure there is no dirt or damage to the exhaust gas tempera- ture sensor (burner outlet).
NO YES
1. Set the starter switch to the "LOCK" position.
2. Disconnect the exhaust gas temperature sensor (burner outlet) connector.
3. Use the electrical tester to measure the resistance between the terminals of the exhaust gas temperature sensor (burner outlet).
NO YES
11
Inspect the exhaust gas temperature sensor (burner outlet)Was any failure found?
Clean the exhaust gas temperature sensor (burner outlet) and install it properly.
If damaged, replace the exhaust gas temper- ature sensor (burner outlet).
Perform "After-inspection work" of INFOR- MATION section.
Go to step 12.
12
Inspect the exhaust gas temperature sensor (burner outlet) unitDIT- DIT+
SAPH16F010300721
Measurement
conditions Tester connections Standard values Starter switch:
LOCK
Exhaust gas tem- perature sensor (burner outlet) DIT+ – DIT-
0.3 – 1.8
Do the measurements meet the standard value?
Replace the BCU.
Perform "After-inspection work" of INFOR- MATION section.
Replace the exhaust gas temperature sensor (burner outlet).
Perform "After-inspection work" of INFOR-