( TF09EABK7210009102AFAAT00 )
DTC Troubleshooting: P102A (120)
DTC P102A:
 Subfuel Solenoid Circuit Malfunction
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.
  1. Turn the ignition switch to ON (II).
  1. Clear the DTC with HDS.
  1. Start the engine.
  1. Select SUBFUEL SOLENOID ON in the INSPECTION MENU with the HDS.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P102A indicated?
YES -
Go to Step 6 .
NO -
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the subfuel solenoid, the subfuel pump relay, and the ECM/PCM.■
  1. Turn the ignition switch to LOCK (0).
  1. Remove the subfuel pump relay from the relay holder.
Is the subfuel pump relay OK?
YES -
Go to Step 9 .
NO -
Replace the subfuel pump relay, then go to Step 34 .
  1. Check the SUBFUEL PUMP (15 A) fuse in the auxiliary under-dash fuse holder.
Is the fuse OK?
YES -
Go to Step 13 .
NO -
Go to Step 10 .
  1. Disconnect the SUBFUEL PUMP (15 A) fuse from the auxiliary under-dash fuse holder.
  1. Disconnect the subfuel solenoid 2P connector.
  1. Check for continuity between subfuel solenoid 2P connector terminal No. 1 and body ground.
Is there continuity?
YES -
NO -
Repair short in the wire between the SUBFUEL PUMP (15 A) fuse and the subfuel pump relay. Also replace the SUBFUEL PUMP (15 A) fuse, then go to Step 34 .
  1. Reconnect the subfuel pump relay to the auxiliary under-hood relay box.
  1. Disconnect the subfuel solenoid 2P connector.
  1. Turn the ignition switch to ON (II), and measure the voltage between subfuel solenoid 2P connector terminal No. 1 and body ground within 2 seconds.
Is there battery voltage?
YES -
Go to Step 22 .
NO -
Go to Step 16 .
  1. Turn the ignition switch to LOCK (0).
  1. Jump the SCS line with the HDS.
  1. Disconnect ECM/PCM connector A (49P).
  1. Connect subfuel pump relay 4P connector terminal No. 3 to body ground with a jumper wire.
  1. Check for continuity between ECM/PCM connector terminal A33 and body ground.
Is there continuity?
YES -
  • Repair open in the wire between the subfuel pump relay and the subfuel solenoid, then go to Step 34 .
  • Repair open in the wire between the SUBFUEL PUMP (15 A) fuse and the subfuel pump relay, then go to Step 34 .
NO -
Repair open in the wire between the ECM/PCM (A33) and the subfuel pump relay, then go to Step 34 .
  1. Turn the ignition switch to LOCK (0).
  1. At the subfuel solenoid side, measure the resistance between subfuel solenoid 2P connector terminals No. 1 and No. 2.
Is there about 9.78−10.82 Ω at room temperature?
YES -
Go to Step 24 .
NO -
Go to Step 32 .
  1. At the subfuel solenoid side, check for continuity between body ground and subfuel solenoid 2P connector terminals No. 1 and No. 2 individually.
Is there continuity?
YES -
Go to Step 32 .
NO -
Go to Step 25 .
  1. Jump the SCS line with the HDS.
  1. Disconnect ECM/PCM connector C (49P).
  1. Check for continuity between subfuel solenoid 2P connector terminal No. 2 and body ground.
Is there continuity?
YES -
Repair short in the wire between the ECM/PCM (C19) and the subfuel solenoid, then go to Step 34 .
NO -
Go to Step 28 .
  1. Turn the ignition switch to ON (II).
  1. Measure the voltage between subfuel solenoid 2P connector terminal No. 2 and body ground.
Is there battery voltage?
YES -
Repair short to power in the wire between the ECM/PCM (C19) and the subfuel solenoid, then go to Step 33 .
NO -
Go to Step 30 .
  1. Turn the ignition switch to LOCK (0).
  1. Check for continuity between subfuel solenoid 2P connector terminal No. 2 and ECM/PCM connector terminal C19.
Is there continuity?
YES -
Go to Step 41 .
NO -
Repair open in the wire between the ECM/PCM (C19) and the subfuel solenoid, then go to Step 34 .
  1. Turn the ignition switch to LOCK (0).
  1. Reconnect all connectors.
  1. Turn the ignition switch to ON (II).
  1. Reset the ECM/PCM with the HDS.
  1. Start the engine.
  1. Select SUBFUEL SOLENOID ON in the INSPECTION MENU with the HDS.
  1. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES -
If DTC P102A is indicated, check for poor connections or loose terminals at the subfuel solenoid, the subfuel pump relay, and the ECM/PCM, then go to Step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO -
Troubleshooting is complete.■
  1. Start the engine.
  1. Select SUBFUEL SOLENOID ON in the INSPECTION MENU with the HDS.
  1. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES -
If DTC P102A is indicated, check for poor connections or loose terminals at the subfuel solenoid, the subfuel pump relay, and the ECM/PCM, then go to Step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO -
If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM. ■