Checking signal cable, rail pressure sensor
Tools:
885675 Break-out cable
88890074 Multimeter
1 Cut the current with the main switch.
2 Disconnect the connector from the sensor.
3 Connect break-out cable 885675 to the cable harness connector to the engine control unit.
4 Use multimeter 88890074 to do resistance measurement against the engine control unit.
Measurement points | Nominal value |
1-2 | R ≈ 4.0–5.0 kΩ |
NOTICE! Measurement is done to eliminate short circuiting or breaks in the cable to the engine control unit.
Checking injection control pressure sensor
Tools:
885675 Break-out cable
88890074 Multimeter
1 Turn ignition off.
2 Disconnect the connector from the sensor.
3 Connect break-out cable 885675 between the sensor and the engine control unit.
4 Use multimeter 88890074 for voltage measurement.
5 Turn ignition on.
Measurement points | Nominal value |
1-2 | U ≈ 0,5 V* |
* At normal atmospheric pressure.
Checking the wiring to the MPROP valve
Tools:
88890074 Multimeter
NOTICE! If any of the measurements shows an abnormal value, check the wiring to and from the engine interface.
1 Cut the current with the main switch.
2 Remove the connector to the MPROP.
3 Remove connector A from the EMS2.
4 Use multimeter 88890074 to do a resistance measurement against the engine control unit connector A.
Measurement points | Nominal value |
2 (885675) – 16 (EMS 2, conn. A) | R ≈ 0 Ω |
2 (885675) – 12 (EMS 2, conn. A) | R ≈ ∞ Ω |
1 (885675) – 16 (EMS 2, conn. A) | R ≈ ∞ Ω |
1 (885675) – 12 (EMS 2, conn. A) | R ≈ 0 Ω |
Checking the solenoid in the MPROP valve
Tools:
885675 Break-out cable
88890074 Multimeter
1 Cut the current with the main switch.
2 Remove the connector from the MPROP valve. Connect break-out cable 885675 to the valve.
NOTICE! Do not connect the other end of the adapter cable to the engine cable harness, since
this can cause a measurement error.
3 Use multimeter 88890074 to check the resistance in the solenoid in the MPROP valve.
NOTICE! Measurement is done to eliminate short circuiting or breaks in the MPROP valve.
Measurement points | Nominal value |
1–2 | R ≈ 2–4 Ω at 20 °C (68 °F) |
VODIA Log Parameters
Logging throttle signal with Vodia
To verify the throttle signal on the J1587 bus do as follow:
1 Choose “Log test” under the “Service and maintenance”meny.
2 Choose “MID 128, Accelerator Pedal Position” and “MID 144, Throttle Calibrated Position” and press play.
3 Verify that booth throttle values displayed in percentage by Vodia changes simultaneous while moving the throttle.
For More Volvo Engine workshop information, please visit
Engine Measurements-Checking Volvo Diesel Engine
More Information About Volvo Engine Measurements
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