Fault-Tracing Information

ECC-121, 135, 137, 211 and 221

Short-circuit to ground





Short-circuit to ground

Checking for a short-circuit








- If the diagnostic trouble codes (DTCs) are stored simultaneously, there is a short-circuit to ground in a reference cable for ECC control module connector terminal 6, 14, 16 or 22.
- Ignition off.
- Disconnect the ECC control module.
Check the following cables for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault :
- from ground (0 V) to ECC control module connector terminal 6 (the potentiometer for the air distribution damper motor).
- from ground (0 V) to ECC control module connector terminal 14 (outside temperature sensor).
- from ground (0 V) to ECC control module connector terminal 16 (coolant temperature sensor).
- from ground (0 V) to ECC control module connector terminal 22 (the junction point for the evaporator sensor and the potentiometer for the temperature damper motor).









Select Continue when the fault has been remedied.

Continue - Verification

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Verification




Verification

Hint: Check after repair that the fault has been rectified.












- Ignition off.
- Connect the connectors, reinstall components etc.
- ECC control module connected.
- Ignition on.
- VCT 2000 connected to data link connector (DLC).
Establish communication with the ECC system.





Select Continue.

Continue - Verification, continued

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Verification, continued
Read off diagnostic trouble codes (DTCs).





Select Continue.

Continue - Verification, continued

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Verification, continued
Erase the diagnostic trouble codes (DTCs).





Select Continue.

Continue - Verification, continued

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Verification, continued
Check that diagnostic trouble codes (DTCs) do not recur.





Do the diagnostic trouble codes (DTCs) recur?

Yes - VERIFICATION FAILED

No - VERIFIED

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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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Attempt New Test - Checking for a short-circuit

FAULT-TRACING FAILED - FAULT-TRACING FAILED

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FAULT FOUND - FAULT FOUND

FAULT-TRACING FAILED - FAULT-TRACING FAILED

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