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DTC P16F4

DTC P16F4  : Starter Cut Relay 2 Control Circuit Low Voltage

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information .
DTC Description Confirmed DTC Pending DTC Freeze Frame
P16F4 Starter Cut Relay 2 Control Circuit Low Voltage      

DTC (PGM-FI)

  1. Engine starting check

    -1. Try to start the engine.

    Does the engine start?

    YES 

    Go to step 2.

    NO 

    Go to step 4.

  2. Problem verification

    -1. Turn the vehicle to the OFF (LOCK) mode.

    -2. Turn the vehicle to the ON mode.

    -3. Clear the DTC with the HDS.

    -4. Check for Pending or Confirmed DTCs with the HDS.

    DTC Description Confirmed DTC Pending DTC Freeze Frame
    P16F4 Starter Cut Relay 2 Control Circuit Low Voltage      

    DTC (PGM-FI)

    Is DTC P16F4 indicated?

    YES 

    The failure is duplicated. Go to step 3.

    NO 

    Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the driver's under-dash fuse/relay box, starter cut relay 2, and the PCM.

  3. Shorted wire check (ST CUT RLY2 CL- line)

    -1. Turn the vehicle to the OFF (LOCK) mode.

    -2. Jump the SCS line with the HDS.

    SCS short

    -3. Disconnect the following connectors.

    Driver's under-dash fuse/relay box connector F (32P)
    PCM connector A (51P)

    -4. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
      Driver's under-dash fuse/relay box connector F (32P): disconnected
      PCM connector A (51P): disconnected
    Test circuit ST CUT RLY2 CL-
    Test point 1 PCM connector A (51P) No. 4 (RED)
    Test point 2 Body ground
    GHH345168Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    Repair a short in the ST CUT RLY2 CL- wire between the PCM (A4) and the driver's under-dash fuse/relay box. If the wire is OK, replace the driver's under-dash fuse/relay box , then do the repair verification.

    NO 

    The ST CUT RLY2 CL- wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM , then do the repair verification.

  4. Starter system check

    -1. Turn the vehicle to the ON mode.

    -2. Move the shift lever to P or N.

    -3. Check the parameter(s) below with the HDS.

    Signal Threshold Current conditions
    Values Unit Values Unit
    STARTER CUT CTRL RETURN ON      

    Do the current condition(s) match the threshold?

    YES 

    Go to step 5.

    NO 

    Go to the symptom troubleshooting for engine will not start .

  5. Determine possible failure area (PCM, others)

    -1. Turn the vehicle to the OFF (LOCK) mode.

    -2. Jump the SCS line with the HDS.

    SCS short

    -3. Disconnect the following connector.

    PCM connector A (51P)

    -4. Turn the vehicle to the ON mode.

    -5. Move the shift lever to P or N.

    -6. Measure the voltage between test points 1 and 2.

    Test condition Vehicle ON mode
      PCM connector A (51P): disconnected
    Test circuit ST CUT RLY2 CL-
    Test point 1 PCM connector A (51P) No. 4 (RED)
    Test point 2 Body ground
    GHH345169Courtesy of HONDA, U.S.A., INC.

    Is there battery voltage?

    YES 

    Update the PCM if it does not have the latest software, or substitute a known-good PCM , then do the repair verification.

    NO 

    Go to step 6.

  6. Open wire check (ST CUT RLY2 CL- line)

    -1. Turn the vehicle to the OFF (LOCK) mode.

    -2. Disconnect the following connector.

    Driver's under-dash fuse/relay box connector F (32P)

    -3. Connect terminals A and B with a jumper wire.

    Terminal A Driver's under-dash fuse/relay box connector F (32P) No. 27 (RED)
    Terminal B Body ground
    GHH345170Courtesy of HONDA, U.S.A., INC.

    -4. Check for continuity between test points 1 and 2.

    Test condition Vehicle ON mode
    PCM connector A (51P): disconnected
    Driver's under-dash fuse/relay box connector F (32P): disconnected
    Driver's under-dash fuse/relay box connector F (32P) No. 27: jumped to body ground
    Test circuit ST CUT RLY2 CL-
    Test point 1 PCM connector A (51P) No. 4 (RED)
    Test point 2 Body ground
    GHH345171Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    The ST CUT RLY2 CL- wire is OK. Replace the driver's under-dash fuse/relay box , then do the repair verification.

    NO 

    Repair an open in the ST CUT RLY2 CL- wire between the PCM (A4) and the driver's under-dash fuse/relay box, then do the repair verification.

  7. Repair verification

    -1. Turn the vehicle to the OFF (LOCK) mode.

    -2. Reconnect all connectors.

    -3. Exit the SCS mode with the HDS.

    -4. Turn the vehicle to the ON mode.

    -5. Reset the PCM with the HDS .

    Reset PCM

    -6. Do the PCM idle learn procedure .

    -7. Check for Pending or Confirmed DTCs with the HDS.

    DTC Description Confirmed DTC Pending DTC Freeze Frame
    P16F4 Starter Cut Relay 2 Control Circuit Low Voltage      

    DTC (PGM-FI)

    Is DTC P16F4 indicated?

    YES 

    Check for poor connections or loose terminals at the driver's under-dash fuse/relay box, starter cut relay 2, and the PCM. If the PCM was updated, substitute a known-good PCM , then recheck. If the PCM was substituted, go to step 1.

    NO 

    If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM . If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.

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