Loading ...
Loading ...
Loading ...
EC-1256
[YD (WITH EURO-OBD)]
DTC P0471 DIFFERENTIAL EXHAUST PRESSURE SENSOR
6. CHECK DIFFERENTIAL EXHAUST PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND
SHORT
1. Check harness continuity between differential exhaust pressure sensor terminal 2 and ECM terminal 58.
Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 8.
NG >> GO TO 7.
7. DETECTED MALFUNCTIONING PART
Check the following.
● Harness connectors E84, F51
● Harness for open or short between differential exhaust pressure sensor and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
8. CHECK DIFFERENTIAL EXHAUST PRESSURE SENSOR
Refer to EC-1256, "
Component Inspection" .
OK or NG
OK >> GO TO 9.
NG >> Replace differential exhaust pressure sensor.
9. CHECK INTERMITTENT INCIDENT
Refer to EC-1058, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>> INSPECTION END
Component Inspection BBS002KG
DIFFERENTIAL EXHAUST PRESSURE SENSOR
1. Turn ignition switch OFF.
2. Remove differential exhaust pressure sensor tube (Upstream and downstream).
CAUTION:
Never remove the bracket of differential exhaust pressure sensor.
3. Install pressure pump to differential exhaust pressure sensor hose connector (Upstream side).
4. Turn ignition switch ON and check output voltage between ECM terminal 58 and ground under the follow-
ing conditions.
Continuity should exist.
1. Differential exhaust pressure sensor A. Pressure pump B. Differential exhaust pressure sensor
hose connector (Upstream side)
PBIB3182E
Loading ...
Loading ...
Loading ...