Volvo Penta Group 23 EDC III — Checking the combined sensor for charge air pressure/temperature
Testing & diagnosis · Charge air pressure/temperature sensor
For the Volvo Penta Group 23 EDC III, from the Volvo Penta service manual.
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Procedure
- Switch off the engine.
- Disconnect connector; connect 4-pin adapter 9998534 between sensor connector and engine wiring; connect multimeter between points 1-4.
- Switch on operating voltage; check multimeter reads 5.0 volts.
- Connect multimeter between points 2-4; voltage should be about 1.2 V at normal atmospheric pressure.
- For temperature: connect adapter 9998534 between sensor connector and multimeter; measure resistance between adapter points.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Points 1-4: 5.0 V
- Points 2-4: ~1.2 V at atmospheric pressure
- Temperature points 3-4: R~6.2 kΩ (20°C / 68°F)
- Temperature points 3-4: R~2.5 kΩ (40°C / 104°F)
Source: Volvo Penta service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.