DTC P2101

DTC P2101  : ETCS Malfunction

Do not insert your fingers into the installed throttle body when you turn the vehicle to the ON mode, or while the vehicle is in ON mode. If you do, you will seriously injure your fingers if the throttle valve is activated.

DTC (PGM-FI)

1. ETCS system check

   -1. Turn the vehicle to the ON mode.

   -2. Clear the DTC with the HDS.

   -3. Turn the vehicle to the OFF (LOCK) mode.

   -4. Turn the vehicle to the ON mode.

   -5. Select the ETCS TEST in the Function Test Menu with the HDS.

   ETCS TEST

   -6. Check for Pending or Confirmed DTCs with the HDS.

   DTC Description	Confirmed DTC	Pending DTC
   P2101 ETCS Malfunction

   DTC (PGM-FI)

   Is DTC P2101 indicated?

   YES 

   The failure is duplicated. Go to step 3.

   NO 

   Go to step 2.

2. Problem verification:

   -1. Test-drive the vehicle for several minutes in the range of these recorded on-board snapshot parameters:

   • ENGINE SPEED
   • VEHICLE SPEED
   • APP SENSOR

   On-board Snapshot

   Signal	Current conditions
   	Values	Unit
   Engine Speed
   Vehicle Speed
   APP Sensor

   Data List

   -2. Check for Pending or Confirmed DTCs with the HDS.

   DTC Description	Confirmed DTC	Pending DTC
   P2101 ETCS Malfunction

   DTC (PGM-FI)

   Is DTC P2101 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 throttle body 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 .

3. Determine possible failure area (throttle body, others)

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

   -2. Remove the air intake tube .

   -3. Turn the vehicle to the ON mode.

   -4. Clear the DTC with the HDS.

   -5. Visually check the throttle valve operation while doing the ETCS TEST in the Function Test Menu with the HDS.

   ETCS TEST

   Does the throttle valve operate smoothly?

   YES 

   Clean the throttle body , and recheck. If DTC P2101 is indicated again, replace the throttle body .

   NO 

   Go to step 4.

4. Open wire check (MTR1 line, MTR2 line)

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

   -2. Jump the SCS line with the HDS, and wait more than 1 minute.

   -3. Disconnect the following connectors.

   PCM connector E (80P)

   Throttle body 6P connector

   -4. Connect terminals A and B with a jumper wire.

   Terminal A	Throttle body 6P connector (female terminals) No. 1:
   Terminal B	Throttle body 6P connector (female terminals) No. 2:

   Courtesy of HONDA, U.S.A., INC.

   -5. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	PCM connector E (80P): disconnected
   	Throttle body 6P connector: disconnected
   	Throttle body 6P connector No. 1 and No. 2: jumped
   Test point 1	PCM connector E (80P) No. 27
   Test point 2	PCM connector E (80P) No. 28

   Is there continuity?

   YES 

   Go to step 5.

   NO 

   Repair an open in the MTR1 wire or the MTR2 wire between the PCM (E27, E28) and the throttle body.

5. Throttle body internal circuit check

   -1. Remove the jumper wire from the throttle body 6P connector.

   -2. At the throttle body side, measure the resistance between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	PCM connector E (80P): disconnected

   	Throttle body 6P connector: disconnected
   Test point 1	Throttle body 6P connector (male terminals) No. 1 (throttle body side):
   Test point 2	Throttle body 6P connector (male terminals) No. 2 (throttle body side):

   Courtesy of HONDA, U.S.A., INC.

   Is there about 1.0 kΩ or more?

   YES 

   Replace the throttle body .

   NO 

   The throttle body internal circuit is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM , then recheck. If DTC P2101 goes away and the PCM was substituted, replace the original PCM .