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ZC5010410045 Harness side: C-121 (2) Measure resistance between terminal 15 and ground. OK: The resistance should be 2 ohm or less. Q:Is the measured resistance 2 ohms or less? YES: Go to Step 7. NO: Go to Step 6. STEP 6. Check the wiring harness between hands-free Q:Is the wiring harness between hands-free module connector C-121 (terminal 15) and ground in good condition? YES: The trouble can be an intermittent malfunction (Refer to GROUP 00, How to use Troubleshooting/inspection NO: The wiring harness may be damaged or the connector (s) may have loose, corroded or damaged terminals, or STEP 7. Check the power supply circuit to the hands-free (1) Disconnect hands-free module connector C-121, and ZC5010400049 Harness side: C-121 (2) Measure the voltage between terminal 13 and ground. OK: The voltage should measure approximately 12 Q:Is the measured voltage approximately 12 volts (battery positive voltage)? YES: Go to Step 9. NO: Go to Step 8. STEP 8. Check the wiring harness between hands-free Q:Is the wiring harness between hands-free module connector C-121 (terminal 13) and ETACS-ECU connector C-317 (terminal 1) in good condition? YES: The trouble can be an intermittent malfunction (Refer to GROUP 00, How to use Troubleshooting/inspection ACCESSORY 54Ae-19 HANDS-FREE CELLULAR PHONE SYSTEM |