DTC P1659
DTC P1659 : ETCS Control Relay OFF Malfunction
| DTC Description | Confirmed DTC | Pending DTC | Freeze Frame |
|---|---|---|---|
| P1659 ETCS Control Relay OFF Malfunction |
DTC (PGM-FI)
- 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 Freeze Frame 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 ETCS control relay and the PCM.
- Determine possible failure area (+B DBW or IG1M/DBW RLY OUT line, others)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Check the following fuse.
Fuse No. C9 (15 A) Location Under-hood fuse/relay box Is the fuse OK?
YES
Go to step 3.
NO
Go to step 8.
- ETCS control relay test
-1. Remove the ETCS control relay (A) from the under-hood fuse/relay box.
-2. Test the ETCS control relay .
Is the relay OK?
YES
The ETCS control relay is OK. Go to step 4.
NO
Replace the ETCS control relay, then do the repair verification.
- Determine possible failure area (under-hood fuse/relay box, others)
-1. Turn the vehicle to the ON mode.
-2. Measure the voltage between test points 1 and 2.
Test condition Vehicle ON mode ETCS control relay: disconnected Test circuit FI MAIN RLY OUT Test point 1 ETCS control relay 4P socket No. 3 Test point 2 Body ground Is there battery voltage?
YES
Go to step 5.
NO
Replace the under-hood fuse/relay box , then do the repair verification.
- Open wire check (+B DBW line)
-1. Measure the voltage between test points 1 and 2.
Test condition Vehicle ON mode ETCS control relay: disconnected Test circuit +B DBW Test point 1 ETCS control relay 4P socket No. 1 Test point 2 Body ground Is there battery voltage?
YES
The +B DBW wire is OK. Go to step 6.
NO
Repair an open in the +B DBW wire between the No. C9 (15 A) fuse and the ETCS control relay, or replace the under-hood fuse/relay box , then do the repair verification.
- Open wire check (IG1M/DBW RLY OUT line)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Jump the SCS line with the HDS.
-3. Disconnect the following connector.
PCM connector C (51P) -4. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode ETCS control relay: disconnected PCM connector C (51P): disconnected Test circuit IG1M, DBW RLY OUT Test point 1 ETCS control relay 4P socket No. 2 Test point 2 PCM connector C (51P) No. 4 (GRN) Is there continuity?
YES
The IG1M/DBW RLY OUT wire is OK. Go to step 7.
NO
Repair an open in the IG1M/DBW RLY OUT wire between the PCM (C4) and the ETCS control relay, then do the repair verification.
- Open wire check (DBW RLY CL- line)
-1. Disconnect the following connector.
PCM connector A (51P) -2. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode ETCS control relay: disconnected PCM connector C (51P): disconnected PCM connector A (51P): disconnected Test circuit DBW RLY CL- Test point 1 ETCS control relay 4P socket No. 4 Test point 2 PCM connector A (51P) No. 13 (WHT) Is there continuity?
YES
The DBW RLY 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.
NO
Repair an open in the DBW RLY CL- wire between the PCM (A13) and the ETCS control relay, then do the repair verification.
- Shorted wire check (IG1M/DBW RLY OUT line)
-1. Remove the ETCS control relay (A) from the under-hood fuse/relay box.
-2. Jump the SCS line with the HDS.
-3. Disconnect the following connector.
PCM connector C (51P) -4. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode ETCS control relay: disconnected PCM connector C (51P): disconnected Test circuit IG1M Test point 1 PCM connector C (51P) No. 4 (GRN) Test point 2 Body ground Is there continuity?
YES
Repair a short in the IG1M/DBW RLY OUT wire between the PCM (C4) and the ETCS control relay, then do the repair verification.
NO
The IG1M/DBW RLY OUT wires are OK. Go to step 9.
- Determine possible failure area (+B DBW line, PCM)
-1. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode ETCS control relay: disconnected PCM connector C (51P): disconnected Test circuit +B DBW Test point 1 ETCS control relay 4P socket No. 1 Test point 2 Body ground Is there continuity?
YES
Repair a short in the +B DBW wire between the No. C9 (15 A) fuse and the ETCS control relay, or replace the under-hood fuse/relay box , then do the repair verification.
NO
The +B DBW 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.
- 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 P1659 ETCS Control Relay OFF Malfunction DTC (PGM-FI)
Is DTC P1659 indicated?
YES
Check for poor connections or loose terminals at the ETCS control relay 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
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.