P1426: Differential Pressure Sensor - Rationality; Dtc: P1426 - Hino Motors HINO 155 series Workshop Manual

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DTC: P1426

P1426: Differential pressure sensor - rationality

INFORMATION
1. Technical description
• It detects a difference between pressure at the inlet of the muffler and atmospheric pressure and monitors any fail-
ure or malfunction of the DPR.
<Description of malfunction>
• DPR differential pressure sensor is recognized as being stuck or in characteristics failure condition.
2. DTC set condition
(1) DTC detection condition
• Elapse of at least 2 seconds after engine stop
(2) Judgement criteria
• Differential pressure remains less than -2 kPa or higher than 2 kPa for 2 seconds.
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>
• –
ENGINE (J05E)/TROUBLESHOOTING
+QG
+Q6
+QF
Engine ECU
TYP 0.018A ECE
(VC)
TYP 0.001A ECF
(PEX)
TYP 0.018A ECG
(E2)
DPR differential
pressure sensor
EN01H02127030602016125
SHTS021270300680