Signal Too High. Permanent Fault
Signal too high. Permanent fault
Checking the wiring and component
- Ignition off.
Check the cable between control module terminal #63 and heated oxygen sensor (HO2S) connector terminal #2. Check for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Try a new front heated oxygen sensor (HO2S) if no fault is found during the above fault-tracing.
Remedy as necessary.
Other information
- To connect the breakout box and access the control module, see Connecting the breakout box. EMS 2000 Connecting The Breakout Box. EMS 2000
- To access or replace the front heated oxygen sensor (HO2S), see Replace the front heated oxygen sensor (HO2S) Removal and Replacement
- For information about signals see Signal specification Signal Specification.
Continue - Verification
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Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied.
- Reinstall the components, reconnect the connectors etc.
- Connect VCT2000
- Start the engine and allow to idle for approximately 2 minutes.
Check whether diagnostic trouble code (DTC) ECM-18 or ECM-1C has changed status to intermittent.
Is diagnostic trouble code (DTC) ECM-18 or ECM-1C intermittent?
Yes - VERIFIED
No - VERIFICATION FAILED
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VERIFICATION FAILED - Fault-tracing information
VERIFIED - FAULT FOUND
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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 - Exit fault-tracing
No - Attempt New Test
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Attempt New Test - Checking the wiring and component
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