Caterpillar — Test Step 3. Check the Voltage at the Connector
Testing & diagnosis · Suspect sensor harness connector
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.
- Measure voltage on the sensor side of the wiring harness.
- Measure voltage between pin A and pin B for the suspect sensor.
Specs & values
- Analog supply 5.0 ± 0.5 VDC; digital supply 8.0 ± 0.5 VDC
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.