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Pinpoint Test

  1. CHECK THE BCM OUTPUT
    1. Ignition ON.
    2. Using a scan tool, view BCM PIDs  .
    3. Select the BCM active command PID HORN. Command the horn on and then off.

    Does the horn sound when commanded on? 

    1. Yes: GO to 2  .
    2. No: VERIFY the BCM fuse 22 (20A) is OK. If OK, GO to  8.
  2. CHECK FOR VOLTAGE TO THE SCCM
    1. Ignition OFF.
    2. Disconnect: SCCM C2414A.
    3. Measure:
      SCCM Ground
      G08034155
      G08034154
      C2414A Ground
      Pin Circuit Measurement / Action Pin Circuit
      8 CRH04 (VT/GN)
      G08034156
      		 - Ground

    Is the voltage greater than 11 volts? 

    1. Yes: GO to  4.
    2. No: GO to 3  .
  3. CHECK THE HORN RELAY COIL GROUND CONTROLLED CIRCUIT FOR AN OPEN
    1. Disconnect: BCM C2280B.
    2. Measure:
      BCM SCCM
      G08034157
      G08034158
      C2280B C2414A
      Pin Circuit Measurement / Action Pin Circuit
      33 CRH04 (VT/GN)
      G08034159
      		 8 CRH04 (VT/GN)

    Is the resistance less than 3 ohms? 

    1. Yes: GO to  11.
    2. No: REPAIR the circuit.
  4. CHECK THE CLOCKSPRING GROUND CIRCUIT FOR AN OPEN
    1. Disconnect: Clockspring C218A.
    2. Measure:
      Clockspring Ground
      G08034160
      G08034161
      C218A Ground
      Pin Circuit Measurement / Action Pin Circuit
      8 GD214 (BK/BU)
      G08034162
      		 - Ground

    Is the resistance less than 3 ohms? 

    1. Yes: GO to 5  .
    2. No: REPAIR the circuit.
  5. ISOLATE THE STEERING WHEEL HARNESS
    1. Connect: Clockspring C218A.
    2. Remove the driver air bag module. REFER to DRIVER AIR BAG MODULE .
    3. Disconnect: Clockspring C218B.
    4. Connect: Battery Ground Cable.
    5. Measure:
      Clockspring Clockspring
      G08034163
      G08034164
      C218B (Component Side) C218B (Component Side)
      Pin Circuit Measurement / Action Pin Circuit
      4 -
      G08034165
      		 10 -

    Is the voltage greater than 11 volts? 

    1. Yes: REPAIR the steering wheel harness for an open circuit or INSTALL a new steering wheel. REFER to STEERING WHEEL .
    2. No: GO to 6  .
  6. CHECK FOR VOLTAGE THROUGH THE CLOCKSPRING
    1. Measure:
      Clockspring Ground
      G08034166
      G08034167
      C218B (Component Side) Ground
      Pin Circuit Measurement / Action Pin Circuit
      4 -
      G08034168
      		 - Ground

    Is the voltage greater than 11 volts? 

    1. Yes: INSTALL a new clockspring. REFER to CLOCKSPRING .
    2. No: GO to 7  .
  7. CHECK FOR AN OPEN IN THE CLOCKSPRING
    1. Remove the clockspring. REFER to CLOCKSPRING .
    2. Measure:
      Clockspring Clockspring
      G08034169
      G08034170
      C218B (Component Side) C218C (Component Side)
      Pin Circuit Measurement / Action Pin Circuit
      4 -
      G08034171
      		 1 -

    Is the resistance less than 3 ohms? 

    1. Yes: GO to  12.
    2. No: INSTALL a new clockspring. REFER to CLOCKSPRING .
  8. CHECK FOR VOLTAGE AND GROUND TO THE HORN
    1. Disconnect: Horn.
    2. While activating the horn, measure:
      Horn Horn
      G08034172
      G08034173
      C131 C131
      Pin Circuit Measurement / Action Pin Circuit
      2 SRH01 (YE/RD)
      G08034174
      		 1 GD120 (BK/GN)

    Is the voltage greater than 11 volts? 

    1. Yes: INSTALL a new horn. REFER to Horn .
    2. No: GO to 9  .
  9. CHECK FOR VOLTAGE TO THE HORN
    1. While activating the horn, measure:
      Horn Ground
      G08034175
      G08034176
      C131 Ground
      Pin Circuit Measurement / Action Pin Circuit
      2 SRH01 (YE/RD)
      G08034177
      		 - Ground

    Is the voltage greater than 11 volts? 

    1. Yes: REPAIR the horn ground circuit for an open.
    2. No: GO to 10  .
  10. CHECK THE BCM HORN OUTPUT CIRCUIT FOR AN OPEN
    1. Ignition OFF.
    2. Disconnect: BCM C2280E.
    3. Measure:
      BCM Horn
      G08034178
      G08034179
      C2280E C131
      Pin Circuit Measurement / Action Pin Circuit
      3 SRH01 (YE/RD)
      G08034180
      		 2 SRH01 (YE/RD)

    Is the resistance less than 3 ohms? 

    1. Yes: GO to 11  .
    2. No: REPAIR the circuit.
  11. CHECK FOR CORRECT BCM OPERATION
    1. Disconnect and inspect all BCM connectors.
    2. Repair:
      • corrosion (install new connector or terminals - clean module pins)
      • damaged or bent pins - install new terminals/pins
      • pushed-out pins - install new pins as necessary
    3. Reconnect the BCM connectors. Make sure they seat and latch correctly.
    4. Operate the system and determine if the concern is still present.

    Is the concern still present? 

    1. Yes: CHECK OASIS  for any applicable TSBs  . If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs  address this concern, INSTALL a new BCM. REFER to BODY CONTROL MODULE (BCM) - WITH INTELLIGENT ACCESS (IA) or BODY CONTROL MODULE (BCM) - WITHOUT INTELLIGENT ACCESS (IA) .
    2. No: The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
  12. CHECK FOR CORRECT SCCM OPERATION
    1. Disconnect and inspect all SCCM connectors.
    2. Repair:
      • corrosion (install new connector or terminals - clean module pins)
      • damaged or bent pins - install new terminals/pins
      • pushed-out pins - install new pins as necessary
    3. Reconnect the SCCM connectors. Make sure they seat and latch correctly.
    4. Operate the system and determine if the concern is still present.

    Is the concern still present? 

    1. Yes: CHECK OASIS  for any applicable TSBs  . If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs  address this concern, INSTALL a new SCCM REFER to STEERING COLUMN CONTROL MODULE (SCCM) .
    2. No: The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
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