Signal Missing. Permanent Fault

Signal missing. Permanent fault

Checking the resistance in the signal cable








- DSA control module disconnected.
- Engine control module (ECM) disconnected.
- Breakout box connected to the engine control module (ECM).

FENIX 5.1
- Connect an ohmmeter between DSA control module connector terminal 13 and engine control module (ECM) breakout box terminal 37.

EMS 2000
- Connect an ohmmeter between DSA control module connector terminal 13 and engine control module (ECM) breakout box terminal 71.

Other information
- To connect the breakout box for DSA, see Connecting the breakout box. DSA Connecting The Breakout Box. DSA.
- To connect the breakout box for FENIX 5.1, see Connecting the breakout box. FENIX 5.1 Connecting The Breakout Box. FENIX 5.1.
- To connect the breakout box for EMS 2000, see Connecting the breakout box. EMS 2000 Connecting The Breakout Box. EMS 2000.









The ohmmeter should read approximately 0 ohms.

OK - Checking the signal cable resistance to ground

Not OK - Checking for an open-circuit

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Checking for an open-circuit

FENIX 5.1
- Check the cable between DSA control module connector terminal 13 and engine control module (ECM) terminal 37 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.

EMS 2000
- Check the cable between DSA control module connector terminal 13 and engine control module (ECM) terminal 71 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.









Select Continue when the fault has been remedied.

Continue - Verification

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Checking the signal cable resistance to ground








- Ignition off.
- DSA control module disconnected.
- Engine control module (ECM) disconnected.
- Breakout box connected to the engine control module (ECM).

FENIX 5.1
- On vehicles with automatic transmission: Disconnect the automatic transmission control module (TCM).
- Connect an ohmmeter between breakout box terminal 37 and ground.

EMS 2000
- Connect an ohmmeter between breakout box terminal 71 and ground.

Other information
- To connect the breakout box for FENIX 5.1, see Connecting the breakout box. FENIX 5.1 Connecting The Breakout Box. FENIX 5.1.
- To connect the breakout box for EMS 2000, see Connecting the breakout box. EMS 2000 Connecting The Breakout Box. EMS 2000.









The ohmmeter should read infinite resistance.

OK - Checking the signal cable for a short-circuit to supply voltage

Not OK - Checking for a short-circuit

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Checking for a short-circuit

FENIX 5.1
- Check the cable between engine control module (ECM) terminal 37 and DSA control module terminal 13 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
- On vehicles with automatic transmission: Also check the cable between engine control module (ECM) terminal 37 and automatic transmission control module (TCM) terminal 23 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.

EMS 2000
- Check the cable between engine control module (ECM) terminal 71 and DSA control module terminal 13 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.









Select Continue when the fault has been remedied.

Continue - Verification

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Checking the signal cable for a short-circuit to supply voltage








- Ignition off.
- Connect the DSA control module.
- Connect the engine control module (ECM).
- Breakout box connected to the engine control module (ECM).
- Start the engine.

FENIX 5.1
- On vehicles with automatic transmission: Connect the automatic transmission control module (TCM).
- Connect an electrician's screwdriver (with a bulb of at least 3 W) between breakout box terminal 37 and ground.

EMS 2000
- Connect an electrician's screwdriver (with a bulb of at least 3 W) between breakout box terminal 71 and ground.

Other information
- To connect the breakout box for DSA, see Connecting the breakout box. DSA Connecting The Breakout Box. DSA.
- To connect the breakout box for FENIX 5.1, see Connecting the breakout box. FENIX 5.1 Connecting The Breakout Box. FENIX 5.1.
- To connect the breakout box for EMS 2000, see Connecting the breakout box. EMS 2000 Connecting The Breakout Box. EMS 2000.









The electricians screwdriver should notlight. Is the electrician's screwdriver unlit?

Yes - Fault cause and checking for contact resistance and oxidation

No - Checking for a short-circuit

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Fault cause and checking for contact resistance and oxidation
The diagnostic trouble code (DTC) was caused by poor contact in the DSA control module and / or engine control module (ECM) connectors.
Check the connectors for contact resistance and oxidation and remedy according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.

Select Continue when the fault has been remedied.

Continue - Verification

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Checking for a short-circuit

FENIX 5.1
- Check the cable between engine control module (ECM) terminal 37 and DSA control module terminal 13 for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
- On vehicles with automatic transmission: Also check the cable between engine control module (ECM) terminal 37 and automatic transmission control module (TCM) terminal 23 for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.

EMS 2000
- Check the cable between engine control module (ECM) terminal 71 and DSA control module terminal 13 for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.









Select Continue when the fault has been remedied.

Continue - Verification

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Verification




Verification

Verification

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off.
- Reconnect the connectors, reinstall components etc.
- DSA control module connected.
- Start the engine.
Read off the load signal. Check that the value is OK.

Hint: Normal range idling with the engine at operating temperature, neutral selected and the air conditioning (A/C) off: approximately 36 micros. This value increases with load.





Is the value of the load signal OK?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - FAULT FOUND

VERIFICATION FAILED - Fault-tracing information

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Fault-tracing information




Information

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.

Do you want to exit fault-tracing?

Yes - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking the resistance in the signal cable

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