DTC C1216: Electronic Brake Control Relay Coil Circuit Open

1. Perform diagnostic system check. See DIAGNOSTIC SYSTEM CHECK. After performing diagnostic system check, go to next step.
2. Turn ignition off. Install scan tool. Turn ignition on, with engine off. Using scan tool RELAY TEST function, command electronic brake control relay on. If scan tool indicates relay is on and battery voltage is equal to or greater than 10 volts, go to step 23)  . If scan tool does not indicate relay is on and battery voltage is less than 10 volts, go to next step.
3. Using DVOM, measure voltage between ignition feed circuit (Pink or Brown wire) of electronic brake control relay connector and ground. If voltage is equal to or greater than 10 volts, go to next step. If voltage is less than 10 volts, go to step 9)  .
4. Using DVOM, measure voltage between relay control circuit (Pink wire) of electronic brake control relay connector and ground. If voltage is equal to or greater than 10 volts, go to next step. If voltage is less than 10 volts, go to step 13)  .
5. Turn ignition off. Disconnect EBCM/EBTCM connector. See EBCM/EBTCM LOCATION  under REMOVAL & INSTALLATION. Turn ignition on, with engine off. Using DVOM, measure voltage between relay control circuit (Pink wire) of EBCM/EBTCM connector and ground. If voltage is equal to or greater than 10 volts, go to next step. If voltage is less than 10 volts, go to step 7)  .
6. Turn ignition off. Check EBCM/EBTCM connector for poor terminal contact, corrosion or damage. If connector is faulty, go to step 17)  . If connector is okay, go to step 8)  .
7. Remove electronic brake control relay. Using DVOM, measure resistance of relay control circuit (Pink wire) between electronic brake control relay connector and EBCM/EBTCM connector. If resistance is 0-2 ohms, go to next step. If resistance is not 0-2 ohms, go to step 18)  .
8. Reconnect EBCM/EBTCM connector. Reinstall electronic brake control relay if removed. Turn ignition on, with engine off. Using scan tool, display DTCs. If DTC C1216 is set as current, go to step 22)  . If DTC C1216 is not set as current, go to step 23)  .
9. Turn ignition off. Remove relay ignition feed fuse. See RELAY IGNITION FEED FUSE IDENTIFICATION table. Turn ignition on, with engine off. Using DVOM, measure voltage between ignition feed circuit (Pink or Brown wire) of fuse block and ground. If voltage is equal to or greater than 10 volts, go to next step. If voltage is less than 10 volts, go to step 16)  .
   RELAY IGNITION FEED FUSE IDENTIFICATION
   
   

   Application		Fuse
   "J" Body		ERLS
   "N" Body
   Achieva, 1998 Grand Am & Skylark		ERLS
   1998 Cutlass & 1998 Malibu		ICC IGN
   Alero, 1999 Cutlass, 1999 Grand Am & 1999 Malibu		ABS IGN
   "W" Body
   Century, Intrigue & Regal		ABS
   Lumina & Monte Carlo		Fuse 13

10. Using DVOM, measure resistance between terminals of relay ignition feed fuse. See RELAY IGNITION FEED FUSE IDENTIFICATION table. If resistance is 0-2 ohms, go to next step. If resistance is not 0-2 ohms, go to step 12)  .
11. Turn ignition off. Using DVOM, measure resistance of ignition feed circuit (Pink or Brown wire) between electronic brake control relay connector and fuse block. If resistance is 0-2 ohms, go to step 23)  . If resistance is not 0-2 ohms, go to step 15)  .
12. Turn ignition off. Disconnect EBCM/EBTCM connector. Using DVOM, measure resistance between switched ignition circuit (Pink or Brown wire) of EBCM/EBTCM connector and ground. If resistance is infinite, go t step 20)  . If resistance is not infinite, go to step 19)  .
13. Remove electronic brake control relay. Using DVOM, measure resistance between electronic brake control relay terminals No. 85 and 86. If resistance is 0-95 ohms (1998 models) or 65-95 ohms (1999 models), go to next step. If resistance is not 0-95 ohms (or 65-95 ohms), go to step 21)  .
14. Check electronic brake control relay connector for poor terminal contact, corrosion or damage. If connector is faulty, go to step 17)  . If connector is okay, go to step 21)  .
15. Repair open or high resistance in ignition feed circuit (Pink or Brown wire) between fuse block and electronic brake control relay.
16. Repair open or high resistance in ignition switch power supply circuits or in ignition switch.
17. Replace all faulty terminals or connectors.
18. Repair open or high resistance in relay control circuit (Pink wire) between electronic brake control relay and EBCM/EBTCM.
19. Repair open or high resistance in switched ignition circuit (Pink or Brown wire) between fuse block and EBCM/EBTCM.
20. Replace relay ignition feed fuse with a known good fuse.
21. Replace electronic brake control relay.
22. Replace EBCM/EBTCM. See ELECTRONIC BRAKE CONTROL MODULE/ ELECTRONIC BRAKE & TRACTION CONTROL MODULE (EBCM/EBTCM)  under REMOVAL & INSTALLATION.
23. Malfunction is not currently present. An intermittent may be caused by a poor connection, rubbed through wire insulation, or a broken wire inside insulation. Frequency of malfunction can be determined by using enhanced diagnostic function of scan tool. If malfunction frequency is high, but currently intermittent, check for high coil resistance by measuring between relay coil terminals. If resistance is greater than 95 ohms, replace electronic brake control relay.

Check for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, poor terminal-to-wiring connections, or damaged wiring harness. After diagnosis is complete, clear DTCs and test drive vehicle for 3 drive cycles to verify DTC does not reset. Drive cycle consists of starting vehicle, driving vehicle faster than 10 MPH, stopping vehicle, and then turning ignition off.