Signal Too High - Intermittent Fault

ECM-8400 5 VOLT POWER SUPPLY
SIGNAL TOO HIGH - INTERMITTENT FAULT

Checking cables



Check cables between
- control module # A57 and camshaft position (CMP) sensor # 1
- control module # A58 and manifold absolute pressure (MAP) sensor # 3
- control module # A58 and air conditioning (A/C) pressure sensor # 3
- control module # B10 and fuel tank pressure sensor # 3
for an intermittent short-circuit to supply voltage according to [1][2]Checking Wiring and Terminals. Intermittent Faults

Other information
- Connecting the breakout box/accessing the control module, Connecting the Breakout Box (ECM)
- To access/replace the control module, Engine Control Module (ECM), Replacing
- To access/replace the camshaft position (CMP) sensor, Camshaft Position Sensor (CMP), Replacing
- To access/replace the mass air flow (MAF) sensor, Mass Air Flow (MAF) Sensor, Replacing
- To access/replace air conditioning (A/C) pressure sensor, Pressure Switch/Pressostat, Replacing
- To access/replace the fuel tank pressure sensor, Fuel Tank Pressure Sensor, Replacing
- For information about signals, Pinout Values and Diagnostic Parameters


Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.