Caterpillar — Test Step 12. Install a Jumper Wire
Testing & diagnosis · Suspect sensor wiring at ECM
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
- Connect the suspect sensor.
- Remove the suspect sensor signal wire and ground wire from the ECM.
- Use a wire with socket terminals to connect sensor signal and ground at the ECM.
- Turn the ECS ON, engine OFF.
- The CID-FMI should change from 03 to 04 when the jumper is in place.
Tools required
- Jumper wire with socket terminals Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
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.