General Information
30
Diagnostic Trouble Code (DTC)
Isolation Procedures
Code 41, FMI 5 1. Check to see if Pin-1 of the DIU harness connector is populated.
a. If no, test complete. The DIU does not utilize a RH external speaker.
Disable the RH external speaker output using diagnostic software.
b. If yes, continue to next step.
2. Check for an open circuit in the external speaker by measuring the resistance between
Pin-1 and Pin-5 of the DIU harness connector.
a. If value is greater than 5 ohms, text failed. Check external speaker and harness
for an open circuit. Repair as needed.
b. If value is 2 to 5 ohms, continue to next step.
3. Replace DIU and verify Diagnostic Trouble Code (DTC) condition has cleared.
4. Test Complete.
Code 42, FMI 4 1. Check for a short to ground by measuring the resistance between Pin-2 and Pin-5 of the
DIU harness connector.
a. If value is less than 3 ohms, test failed. Check external speaker and harness for
short to ground. Repair as needed.
b. If value is 2 to 5 ohms, continue to next step.
2. Replace DIU and verify Diagnostic Trouble Code (DTC) condition has cleared.
3. Test Complete.
Code 42, FMI 5 1. Check to see if Pin-2 of the DIU harness connector is populated.
a. If no, test complete. The DIU does not utilize a LH external speaker.
Disable the LH external speaker output using diagnostic software.
b. If yes, continue to next step.
2. Check for an open circuit in the external speaker by measuring the resistance between
Pin-1 and Pin-5 of the DIU harness connector.
a. If value is greater than 5 ohms, test failed. Check external speaker and harness
for an open circuit. Repair as needed.
b. If value is 2 to 5 ohms, continue to next step.
3. Replace DIU and verify Diagnostic Trouble Code (DTC) condition has cleared.
4. Test Complete.
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