Signal Too Low - Intermittent Fault

ECM-8410 5 VOLT POWER SUPPLY
SIGNAL TOO LOW - INTERMITTENT FAULT

Checking cables



Check the power supply cable between the control module # A39 (# A39) and mass air flow (MAP) sensor # 4 for an intermittent short-circuit to ground according to [1][2]Checking Wiring and Terminals. Intermittent Faults

Check power supply cable between control module # A39 (# A39) and boost pressure sensor # 1 for an intermittent short-circuit to ground according to [1][2]Checking Wiring and Terminals. Intermittent Faults

Check power supply cable between control module # A39 (# A39) and air conditioning (A/C) pressure sensor # 3 for an intermittent short-circuit to ground according to [1][2]Checking Wiring and Terminals. Intermittent Faults

Check power cable between control module # B10 (# B20) and fuel tank pressure sensor connector # 3 for an intermittent short-circuit to ground according to [1][2]Checking Wiring and Terminals. Intermittent Faults

Hint: Read 5 volt power supply by clicking on the VCT 2000 symbol.

Remedy as necessary.

- To connect the breakout box Connecting the Breakout Box (ECM)
- For information about signals, see Diagnostic Parameters and Pinout Values. Signal Description, ME7, B5XX4T
- To access/replace the mass air flow (MAF) sensor, Mass Air Flow (MAF) Sensor, Replacing
- To access/replace the boost pressure sensor, Manifold Absolute Pressure (MAP) Sensor, Replacing


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