Signal Too Low. Permanent Fault
Signal too low. Permanent fault
Checking the fuse
- Ignition off.
Check the fuse for the circuit in the integrated relay / fusebox in the engine compartment.
Replace if necessary.
Other information
- To access or replace the relay or fuse, see the inside of the cover on the engine compartment relay/fusebox.
Was a fault detected?
Yes - Verification
No - Checking the power supply
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Checking the power supply
- Ignition off
- Disconnect air conditioning (A/C) relay 2/10
- Ignition on.
Connect a voltmeter between air conditioning (A/C) relay base terminal #1 and ground.
The voltmeter should read battery voltage.
OK - Checking the signal cable
Not OK - Checking the signal cable
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Checking the signal cable
- Ignition off.
Connect an ohmmeter between air conditioning (A/C) relay base terminal #2 and ground.
The ohmmeter should read infinite resistance.
OK - Checking the air conditioning (A/C) relay
Not OK - Checking the signal cable
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Checking the air conditioning (A/C) relay
Connect an ohmmeter between the air conditioning (A/C) relay terminals #1 and #2 (relay side).
The ohmmeter should read approximately 105 ohms at +20°C.
OK - Checking the signal cable
Not OK - Defective air conditioning (A/C) relay
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Checking the signal cable
- Ignition off.
Check the cable between air conditioning (A/C) system relay base terminal #2 and engine control module (ECM) connector terminal #68. Check for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Remedy as necessary.
Continue - Verification
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Defective air conditioning (A/C) relay
Try a new air conditioning (A/C) relay.
Continue - Verification
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Checking the signal cable
Check the cable between air conditioning (A/C) system relay base terminal #2 and engine control module (ECM) connector terminal #68. Check for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Remedy as necessary.
Continue - Verification
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Checking the signal cable
Check the cable between air conditioning (A/C) system relay base terminal #2 and engine control module (ECM) connector terminal #68. Check for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Remedy as necessary.
Continue - Verification
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Verification
- Reconnect the connectors, reinstall components etc.
- Connect VCT2000
- Ignition on.
Activate the air conditioning (A/C) relay using VCT2000 according to Description of activations Description Of Activations.
Does the air conditioning (A/C) relay click?
Yes - FAULT FOUND
No - No Fault Found 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 - Exit fault-tracing
No - Attempt New Test
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Attempt New Test - Checking the power supply
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