P04D6: Exhaust Brake - Circuit (Circuit High) - Hino Motors HINO 155 series Workshop Manual

P04D6: Exhaust brake - circuit (Circuit high)

INFORMATION
1. Technical description
• –
<Description of malfunction>
• Exhaust brake magnetic valve is not working properly.
• Possible magnetic valve failure or +B short-circuit or disconnection
2. DTC set condition
(1) DTC detection condition
• Exhaust brake inactivity request is in progress.
• Starter key "ON".
• Battery voltage is in the range of 10 V to 16 V.
(2) Judgement criteria
• The condition that the exhaust brake magnetic valve circuit voltage is 3 V or more remains for 3 seconds or
more.
3. Reset condition
• Immediately after normal operation is restored.
4. Indication, warning or system control regulation when the DTC is set.
• MIL: ON
• SVS light: OFF
5. Symptoms on the vehicle when the DTC is set
<Symptoms on the vehicle due to backup control (fail safe function)>
• –
<Symptoms on the vehicle due to malfunction>
• Exhaust brake operates at all times (or does not operate when operation request is received).
6. Pre-inspection work
• Check the battery voltage and make sure it is okay.
ENGINE (J05E)/TROUBLESHOOTING
F ENG-2 30A
NAT %X7
(L ) (+ )
Exhasut brake
magnetic valve
Engine ECU
Max : 61.1A
Rating : 14.5A
X36
(L)
Z23
(-S)
Actuator power relay
U2-ACT
X35
N1B
(B)
(L )
N16
(+S)
SHTS021270300501
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