Signal Too High/Signal Too Low/signal missing

Signal too high/Signal too low/Signal missing

Checking components and wiring
Check the signal cable between engine control module (ECM) terminal #B16 (#C16) and the system relay. Check for an open-circuit. Check for a short-circuit to supply voltage. Check for a short-circuit to ground.
Check the engine control module (ECM) and the system relay connector. Check for contact resistance. Check for oxidation.
Try a new system relay if no fault is found during the above fault-tracing.
Remedy as necessary.

Other information
- Connecting the breakout box Connecting The Breakout Box, Engine Control Module (ECM)
- Signal specification Signal Specification, Engine Control Module (ECM)
- For further information about the fuses and relays, see the Wiring Diagram
- Checking wiring and terminals Checking Wiring and Terminals






Continue - Fault-tracing information

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Fault-tracing information

Attempt New Test - Checking components and wiring

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