Signal Too High. Intermittent Fault

Signal too high. Intermittent fault

Checking components and wiring
Check that the resistance between system relay terminals 3 and 5 is infinite.
Check the power supply cable between engine control module (ECM) terminal #66 and the system relay base terminal 3 for a short-circuit to supply voltage and remedy according to Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults.
Check the power supply cable between the system relay terminal 3 and injectors terminal 1, ignition coils terminal 2, idle air control valve terminal 1, turbocharger (TC) control valve terminal 1, mass air flow (MAF) sensor terminal 3 and heated oxygen sensors (HO2S) terminal 1 for an intermittent short-circuit to supply voltage according to Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults.

Other information
- To connect the breakout box, see Connecting the breakout box. EMS 2000 Connecting The Breakout Box. EMS 2000.













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