Caterpillar — Test Step 11. Compare the Pressure or Temperature to the Actual Pressure or Temperature
Testing & diagnosis · Suspect temperature or pressure sensor
From a Caterpillar service manual covering: 3500B Engine, PM3516, PM3516 Power Module. Check it applies to your exact model before use.
Applies to: Caterpillar 3500B engine
Procedure
- Turn the ECS to the OFF/RESET position.
- For temperature sensors install a 6V-9130 Temperature Adapter near the sensor and observe the reading.
- For pressure sensors disconnect, remove the sensor, connect it to the sensor connector.
- Connect the vacuum pump test unit and differential pressure gauge.
- Turn the ECS ON, engine OFF, and observe the barometric pressure reading.
- Pull 5 kPa (0.7 psi) of vacuum and compare ET and test kit readings.
Tools required
- 6V-9130 Temperature Adapter Amazon
- Vacuum pump test unit Amazon
- Differential pressure gauge Amazon
- ET (Electronic Technician) Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- ET should show a 5 ± 2 kPa (0.7 ± 0.3 psi) drop in pressure
- Temperature can vary 15 °C (59 °F) when below 0 °C (32 °F)
Source: Caterpillar 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.