DTC B156C: Extension Module Disconnected [08/2015 - 08/2019]: Procedure
- CHECK FOR DTC
- Clear the DTCs.
Refer to DTC CHECK / CLEAR [08/2015 - 08/2017] , or refer to DTC CHECK / CLEAR [08/2017 - 08/2019]
- Turn the ignition switch off.
- Check for DTCs.
Refer to DTC CHECK / CLEAR [08/2015 - 08/2017] , or refer to DTC CHECK / CLEAR [08/2017 - 08/2019]
OK
No DTCs are output.
Result
Proceed to OK NG
Result:
OK
USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 08/2017] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2017 - 08/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2018 - 08/2019]
Result:
NG
See step 2
- Clear the DTCs.
- CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - STEREO REPLACEMENT COMPONENT TUNER ASSEMBLY)
- Disconnect the e1 navigation receiver assembly connectors.
- Disconnect the e3 stereo replacement component tuner assembly connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition e1-4 (+B2) - e3-4 (+B2) Always Below 1 Ω e1-3 (ACC2) - e3-3 (ACC2) Always Below 1 Ω e1-8 (GND2) - e3-8 (GND2) Always Below 1 Ω e1-4 (+B2) - Body ground Always 10 kΩ or higher e1-3 (ACC2) - Body ground Always 10 kΩ or higher e1-8 (GND2) - Body ground Always 10 kΩ or higher Result
Proceed to OK NG
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 3
- INSPECT NAVIGATION RECEIVER ASSEMBLY
- Disconnect the stereo replacement component tuner assembly connector.
*a Front view of wire harness connector
(to Stereo Replacement Component Tuner Assembly) - Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition e3-4 (+B2) - e3-8 (GND2) Always 11 to 14 V e3-3 (ACC2) - e3-8 (GND2) Ignition switch ACC 11 to 14 V Result
Proceed to OK NG
Result:
NG
REPLACE NAVIGATION RECEIVER ASSEMBLY. Refer to REMOVAL [08/2015 - 08/2019]
Result:
OK
See step 4
- Disconnect the stereo replacement component tuner assembly connector.
- CHECK HARNESS AND CONNECTOR (USB COMMUNICATION LINE)
- Disconnect the f1 navigation receiver assembly connectors.
*a Front view of wire harness connector
(to Navigation Receiver Assembly)*a Front view of wire harness connector
(to Stereo replacement component Tuner Assembly) - Disconnect the f2 stereo replacement component tuner assembly connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition f1-1 (USV4) - f2-1 (USV4) Always Below 1 Ω f1-2 (US4-) - f2-2 (US4-) Always Below 1 Ω f1-3 (US4+) - f2-3 (US4+) Always Below 1 Ω f1-4 (UGD4) - f2-4 (UGD4) Always Below 1 Ω f1-5 (USG4) - f2-5 (USG4) Always Below 1 Ω f1-1 (USV4) - Body ground Always 10 kΩ or higher f1-2 (US4-) - Body ground Always 10 kΩ or higher f1-3 (US4+) - Body ground Always 10 kΩ or higher f1-4 (UGD4) - Body ground Always 10 kΩ or higher f1-5 (USG4) - Body ground Always 10 kΩ or higher Result
Proceed to OK NG
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 5
- Disconnect the f1 navigation receiver assembly connectors.
- CHECK STEREO REPLACEMENT COMPONENT AMPLIFIER ASSEMBLY
- Replace the stereo component tuner assembly with a known good one.
Refer to REMOVAL [08/2015 - 08/2019]
- Clear the DTCs.
Refer to DTC CHECK / CLEAR [08/2015 - 08/2017] , or refer to DTC CHECK / CLEAR [08/2017 - 08/2019]
- Turn the ignition switch off.
- Check for DTCs.
Refer to DTC CHECK / CLEAR [08/2015 - 08/2017] , or refer to DTC CHECK / CLEAR [08/2017 - 08/2019]
OK
No DTCs are output.
Result
Proceed to OK NG
Result:
OK
END (STEREO REPLACEMENT COMPONENT TUNER ASSEMBLY IS DEFECTIVE)
Result:
NG
REPLACE NAVIGATION RECEIVER ASSEMBLY. Refer to REMOVAL [08/2015 - 08/2019]
- Replace the stereo component tuner assembly with a known good one.