Signal Too High - Permanent Fault

ECM-1600 BOOST PRESSURE SENSOR
SIGNAL TOO HIGH - PERMANENT FAULT

Checking connector



- Ignition off
- Check boost pressure sensor connector for contact resistance and oxidation
- Reinstall components, reconnect connectors etc.
- Ignition on.
- Read boost pressure sensor signal.

Check that the signal is within its permitted range. With engine switched off voltage should be approximately 1.9 V.
If signal is now OK this indicates that the fault was caused by poor contact in the connector.

Other information
- To access/replace the boost pressure sensor, Manifold Absolute Pressure (MAP) Sensor, Replacing

Is the signal OK?
Yes - Testing Complete.
No - Continue below.


Checking wiring and components



Check signal cable between control module #A23 (#A23) and boost pressure sensor #1 for an open-circuit according to [1][2]Checking Wiring and Terminals. Permanent Fault and a short-circuit to supply voltage according to [1][2]Checking Wiring and Terminals. Permanent Fault

Hint: With the ignition on and boost pressure sensor connector disconnected the voltage between #1 and ground terminal should be approximately 5 V.

Check ground lead between control module #A60 (#A60) and boost pressure sensor boost pressure sensor #2 for an open-circuit according to [1][2]Checking Wiring and Terminals. Permanent Fault

Remedy as necessary.

Other information
- Connecting the breakout box/accessing the control module Connecting the Breakout Box (ECM)
- To access/replace the boost pressure sensor, Manifold Absolute Pressure (MAP) Sensor, Replacing
- For information about signals, see Diagnostic Parameters and Pinout Values. Signal Description, ME7, B5XX4T


Verification



Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off.
- Reconnect connectors, reinstall components
- Ignition on.
- Read boost pressure sensor signal.
With the ignition on voltage should be approximately 1.9 V.

Is the signal OK?
Yes - Testing Complete.
No - Continue below.


Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed. Exit fault tracing for this diagnostic trouble code (DTC) or make another attempt.