Signal Too Low. Intermittent Fault

Signal too low. Intermittent fault

Checking ground lead




- Ignition off.
Remove the connector from the antenna unit.
Check the cable between the antenna unit terminal #7 and ground terminal 31/83. Check for an intermittent open-circuit.
Remedy as necessary.

Other information:
- Checking wiring and terminals Checking Wiring And Terminals.





Is the cable OK?

Yes - Checking the power supply

No - Fault-tracing information

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Checking the power supply




- Ignition on.
Check the supply voltage between antenna unit terminal #1 and ground.





Is the voltage OK?

Yes - Checking the signal cable

No - Checking cable for an open-circuit

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Checking the signal cable




- Ignition off.
Check the signal cable between the central electronic module (CEM) and the immobilizer antenna unit.
Diagnostic trouble code (DTC) CEM-6C42:
The cable between the central electronic module (CEM) terminal #14D and the immobilizer antenna unit terminal #2.
Diagnostic trouble code (DTC) CEM-6C44:
The cable between the central electronic module (CEM) terminal #13D and the immobilizer antenna unit terminal #3.
Check the signal cable. Check for an intermittent short-circuit to ground. Check for an intermittent open-circuit. Check for contact resistance and oxidation.
Remedy as necessary.

Other information:
- To access the central electronic module (CEM) connector, see Central electronic module (CEM), replacing Central Electronic Module (CEM), Replacing
- To access the immobilizer antenna unit/connector, see Antenna unit immobilizer, replacing Service and Repair
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM)
- For information about signals, see Signal specification Pinout Values and Diagnostic Parameters
- Checking wiring and terminals Checking Wiring And Terminals.














Continue - Fault-tracing information

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Checking cable for an open-circuit




- Ignition off.
Check the cable between the ignition switch #15A and antenna unit terminal #1. Check for an intermittent open-circuit.

Other information:
- Checking wiring and terminals Checking Wiring And Terminals.






Continue - Fault-tracing information

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Fault-tracing information




Information

Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Do you want to view the information again?

Yes - Attempt New Test

No - Fault Found

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FAULT FOUND - DONE

- DONE

Attempt New Test - Checking ground lead

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