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DTC P1659 (1.5 L Engine)

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DTC P1659  : ETCS Control Relay OFF Malfunction

NOTE:  Before you troubleshoot, review the general troubleshooting information .

DTC Description Confirmed DTC Pending DTC
P1659 ETCS Control Relay OFF Malfunction    

DTC (PGM-FI)

  1. Problem verification

    -1. Turn the vehicle to the ON mode.

    -2. Clear the DTC with the HDS.

    -3. Check for Pending or Confirmed DTCs with the HDS.

    DTC Description Confirmed DTC Pending DTC
    P1659 ETCS Control Relay OFF Malfunction    

    Is DTC P1659 indicated?

    YES 

    The failure is duplicated. Go to step 2.

    NO 

    Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the relay circuit board (PGM-FI subrelay circuit) and the PCM. If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot .

  2. Relay circuit board check

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

    -2. Remove and test the relay circuit board .

    Is the relay circuit board OK?

    YES 

    Go to step 3.

    NO 

    Replace the relay circuit board .

  3. Fuse check

    -1. Check the following fuse.

    Fuse No. A17

    Is the fuse OK?

    YES 

    Go to step 4.

    NO 

    Go to step 7.

  4. Open wire check (+B DBW line)

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

    Test condition Vehicle OFF (LOCK) mode
      Relay circuit board: removed
    Test point 1 Relay circuit board connector C (22P) (female terminals) No. 9:
    Test point 2 Body ground
    GHH393569Courtesy of HONDA, U.S.A., INC.

    Is there battery voltage?

    YES 

    The +B DBW wire is OK. Go to step 5.

    NO 

    Repair an open in the +B DBW wire between the No. A17 fuse and the relay circuit board.

  5. Open wire check (FI SUB RLY OUT line)

    -1. Jump the SCS line with the HDS, and wait more than 1 minute.

    -2. Disconnect the following connector.

    PCM connector A (50P)

    -3. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
      Relay circuit board: removed
      PCM connector A (50P): disconnected
    Test point 1 Relay circuit board connector C (22P) (female terminals) No. 5:
    Test point 2 PCM connector A (50P) No. 16
    GHH393571Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    The FI SUB RLY OUT wire is OK. Go to step 6.

    NO 

    Repair an open in the FI SUB RLY OUT wire between the PCM (A16) and the relay circuit board (PGM-FI subrelay circuit).

  6. Open wire check (FI SUB RLY CL- line)

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

    Test condition Vehicle OFF (LOCK) mode
      Relay circuit board: removed
      PCM connector A (50P): disconnected
    Test point 1 Relay circuit board connector C (22P) (female terminals) No. 8:
    Test point 2 PCM connector A (50P) No. 25
    GHH393573Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    The FI SUB RLY CL- wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM .

    NO 

    Repair an open in the FI SUB RLY CL- wire between the PCM (A25) and the relay circuit board (PGM-FI subrelay circuit).

  7. Shorted wire check (FI SUB RLY OUT line) 1

    -1. Jump the SCS line with the HDS, and wait more than 1 minute.

    -2. Disconnect the following connectors.

    PCM connector A (50P)

    -3. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
      Relay circuit board: removed
      PCM connector A (50P): disconnected
    Test point 1 PCM connector A (50P) No. 16
    Test point 2 Body ground

    Is there continuity?

    YES 

    Repair a short in the FI SUB RLY OUT wire between the PCM (A16) and the relay circuit board (PGM-FI subrelay circuit). Also replace the No. A17 fuse .

    NO 

    Go to step 8.

  8. Shorted wire check (FI SUB RLY OUT line) 2

    -1. Remove the No. A36, A37, and A38 fuses from the under-hood fuse/relay box .

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

    Test condition Vehicle OFF (LOCK) mode
      Relay circuit board: removed
      PCM connector A (50P): disconnected
    Test point 1 Relay circuit board connector C (22P) (female terminals) No. 16:
    Test point 2 Body ground
    GHH393575Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    Repair a short in the FI SUB RLY OUT wire between the relay circuit board and the No. A36, A37, and A38 fuses . Also replace the No. A17 fuse .

    NO 

    The FI SUB RLY OUT wire is OK. Go to step 9.

  9. Shorted wire check (+B DBW line)

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

    Test condition Vehicle OFF (LOCK) mode
      Relay circuit board: removed
      PCM connector A (50P): disconnected
    Test point 1 Relay circuit board connector C (22P) (female terminals) No. 9:
    Test point 2 Body ground
    GHH393577Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    Repair a short in the +B DBW wire between the No. A17 fuse and the relay circuit board. Also replace the No. A17 fuse.

    NO 

    The +B DBW wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM . Also replace the No. A17 fuse .

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