Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - 1VD-FTV ENGINE CONTROL
CHECK WIRE HARNESS (DIFFERENTIAL PRESSURE SENSOR ASSEMBLY - ECM)
REPLACE DIFFERENTIAL PRESSURE SENSOR ASSEMBLY
REPAIR OR REPLACE HARNESS OR CONNECTOR
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
DTC P2454 Diesel Particulate Filter Pressure Sensor "A" Circuit Low
DTC P2455 Diesel Particulate Filter Pressure Sensor "A" Circuit High
DTC P2460 Diesel Particulate Filter Pressure Sensor "B" Circuit Low
DTC P2461 Diesel Particulate Filter Pressure Sensor "B" Circuit High
DESCRIPTION
- HINT:
The two sensing chambers of the differential pressure sensor assembly are mounted to monitor the pressure before and after the DPF catalytic converter. The sensor itself is not located on the engine assembly in order to reduce the influence of vibration.
The ECM compares the exhaust gas pressure before and after the DPF catalytic converter by monitoring the pressure using the upstream and downstream sensing chambers of the differential pressure sensor assembly. If the difference in pressure exceeds a predetermined level, the ECM judges that the catalytic converter is clogged with particulate matter (PM). When the ECM judges that a partially clogged condition exists, the ECM begins to perform PM forced regeneration.
When the output voltage of the sensor deviates from the normal operating range, the ECM interprets this as a malfunction of the sensor circuit, and sets DTC P2454 P2455, P2460 or P2461, and illuminates the MIL.
- HINT:
- If the vacuum hoses of the differential pressure sensor assembly are incorrectly connected (crossed), the ECM interprets this as an abnormal pressure difference, DTC P2453 or P245F is stored and the MIL illuminates.
| DTC Detection Drive Pattern | DTC Detection Condition | Trouble Area |
| Engine switch on (IG) for 5 seconds | The differential pressure sensor assembly output voltage is below 0.4 V for 3 seconds or more. (1 trip detection logic) | Open or short in differential pressure sensor assembly circuit Incorrect differential pressure sensor assembly hose routing Differential pressure sensor assembly ECM |
| DTC Detection Drive Pattern | DTC Detection Condition | Trouble Area |
| Engine switch on (IG) for 5 seconds | The differential pressure sensor assembly output voltage is higher than 4.8 V for 3 seconds or more. (1 trip detection logic) | Open or short in differential pressure sensor assembly circuit Incorrect differential pressure sensor assembly hose routing Differential pressure sensor Assembly ECM |
| DTC No. | Data List |
| P2454 P2455 | DPF Differential Pressure |
| P2460 P2461 | DPF Differential Pressure #2 |
- HINT:
| Condition | Differential Pressure Output | Sensor Condition |
| Engine switch on (IG) | Approximately 0 kPa | Normal |
| Always | -5 kPa or less or higher than 99 kPa | Open or short circuit |
| 4000 rpm (No engine load) | Negative output | Incorrect hose routing |
MONITOR DESCRIPTION
In order to detect abnormality in the differential pressure sensor assembly, the ECM always monitors the output voltage from the sensor. When the sensor output voltage deviates from the normal operating range (between 0.4 V and 4.8 V) for more than 3 seconds, the ECM interprets this as a malfunction in the sensor circuit and illuminates the MIL.
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- HINT:
- Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.
| 1.CHECK WIRE HARNESS (DIFFERENTIAL PRESSURE SENSOR ASSEMBLY - ECM) |
Disconnect the differential pressure sensor assembly connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
for LHD Tester Connection Condition Specified Condition N16-2 (PEX) - C45-69 (PEX) Always Below 1 Ω N16-3 (VC) - C45-91 (VC) Always Below 1 Ω N16-1 (E2) - C45-92 (E2) Always Below 1 Ω C157-2 (PE2X) - C45-70 (PEX2) Always Below 1 Ω C157-3 (VC) - C45-91 (VC) Always Below 1 Ω C157-1 (E2) - C45-92 (E2) Always Below 1 Ω N16-2 (PEX) or C45-69 (PEX) - Body ground Always 10 kΩ or higher N16-3 (VC) or C45-91 (VC) - Body ground Always 10 kΩ or higher C157-2 (PE2X) or C45-70 (PEX2) - Body ground Always 10 kΩ or higher C157-3 (VC) or C45-91 (VC) - Body ground Always 10 kΩ or higher
- Standard Resistance:
for RHD Tester Connection Condition Specified Condition N16-2 (PEX) - C46-69 (PEX) Always Below 1 Ω N16-3 (VC) - C46-91 (VC) Always Below 1 Ω N16-1 (E2) - C46-92 (E2) Always Below 1 Ω C157-2 (PE2X) - C46-70 (PEX2) Always Below 1 Ω C157-3 (VC) - C46-91 (VC) Always Below 1 Ω C157-1 (E2) - C46-92 (E2) Always Below 1 Ω N16-2 (PEX) or C46-69 (PEX) - Body ground Always 10 kΩ or higher N16-3 (VC) or C46-91 (VC) - Body ground Always 10 kΩ or higher C157-2 (PE2X) or C46-70 (PEX2) - Body ground Always 10 kΩ or higher C157-3 (VC) or C46-91 (VC) - Body ground Always 10 kΩ or higher
Reconnect the differential pressure sensor assembly connector.
Reconnect the ECM connector.
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| OK | |
| 2.CHECK TERMINAL VOLTAGE (VC) |
Disconnect the differential pressure sensor assembly connector.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition N16-3 (VC) - Body ground Engine switch on (IG) 4.5 to 5.5 V C157-3 (VC) - Body ground Engine switch on (IG) 4.5 to 5.5 V
| *A | for Bank 1 |
| *B | for Bank 2 |
| *a | Front view of wire harness connector (to Differential Pressure Sensor Assembly) |
Reconnect the differential pressure sensor assembly connector.
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| OK | |
| 3.REPLACE DIFFERENTIAL PRESSURE SENSOR ASSEMBLY |
When DTC P2454 or P2455 is output:
When DTC P2460 or P2461 is output:
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| 4.REPLACE ECM |
Replace the ECM ().
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| 5.REPAIR OR REPLACE HARNESS OR CONNECTOR |
Repair or replace the harness or connector.
| NEXT | |
| 6.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED |
Connect the GTS to the DLC3.
Clear the DTCs ().
Turn the engine switch on (IG) and wait for 5 seconds.
Enter the following menus: Engine and ECT / Trouble Codes.
Confirm that the DTC is not output again.
| NEXT | ||
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