DTC P2118

DTC P2118  : Throttle Actuator Current Range/Performance Problem

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

DTC (PGM-FI)

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   -2. Clear the DTC with the HDS.

   -3. Slowly press the accelerator pedal to the floor.

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

   DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
   P2118 Throttle Actuator Current Range/Performance Problem

   Is DTC P2118 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 throttle body and the PCM, then clean the throttle body . If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot .

2. Open wire check (SG3 line)

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

   -2. Jump the SCS line with the HDS.

   -3. Disconnect the following connectors.

   PCM connector C (51P)

   Throttle body 6P connector

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

   Test condition	Vehicle OFF (LOCK) mode
   	PCM connector C (51P): disconnected
   	Throttle body 6P connector: disconnected
   Test point 1	PCM connector C (51P) No. 16
   Test point 2	Throttle body 6P connector No. 3

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

   Is there continuity?

   YES 

   The SG3 wire is OK. Go to step 3.

   NO 

   Repair an open in the SG3 wire between the PCM (C16) and the throttle body.

3. Shorted wire check (MTR 1 line to MTR 2 line)

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

   Test condition	Vehicle OFF (LOCK) mode
   	PCM connector C (51P): disconnected

   	Throttle body 6P connector: disconnected
   Test point 1	Throttle body 6P connector No. 1
   Test point 2	Throttle body 6P connector No. 2

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

   Is there continuity?

   YES 

   Repair a short in the MTR 1 and MTR 2 wires between the throttle body and the PCM (C4, C3).

   NO 

   Go to step 4.

4. Shorted wire check (MTR 1, MTR 2 line to ground)

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

   Test condition	Vehicle OFF (LOCK) mode
   	PCM connector C (51P): disconnected
   	Throttle body 6P connector: disconnected
   Test point 1	Throttle body 6P connector No. 1
   Test point 2	Body ground

   Test point 1	Throttle body 6P connector No. 2
   Test point 2	Body ground

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

   Is there continuity?

   YES 

   Repair a short to ground in the MTR 1 or the MTR 2 wire between the throttle body and the PCM (C4, C3).

   NO 

   The MTR 1 and MTR 2 wires are OK. Go to step 5.

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

   -1. Connect terminals A and B with a jumper wire.

   Terminal A	Throttle body 6P connector No. 1
   Terminal B	Throttle body 6P connector No. 2

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

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

   Test condition	Vehicle OFF (LOCK) mode
   	Throttle body 6P connector: disconnected
   	Throttle body 6P connector No. 1 and No. 2: jumped
   	PCM connector C (51P): disconnected
   Test point 1	PCM connector C (51P) No. 3
   Test point 2	PCM connector C (51P) No. 4

   Is there continuity?

   YES 

   The MTR1 and MTR2 wires are OK. Go to step 6.

   NO 

   Repair an open in the MTR1 wire or the MTR2 wire between the PCM (C4, C3) and the throttle body.

6. Throttle body internal circuit check (short in wires)

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

   Test condition	Vehicle OFF (LOCK) mode
   	PCM connector C (51P): disconnected
   	Throttle body 6P connector: disconnected
   Test point 1	Throttle body 6P connector No. 1 (throttle body side)
   Test point 2	Throttle body 6P connector No. 2 (throttle body side)

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

   Is there about 1.2 Ω-1.0 kΩ?

   YES 

   Go to step 7

   NO 

   Replace the throttle body .

7. Throttle body internal circuit check (short to ground)

   -1. At the throttle body side, check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	PCM connector C (51P): disconnected
   	Throttle body 6P connector: disconnected
   Test point 1	Throttle body 6P connector No. 2 (throttle body side)

   Test point 2

   Body ground

   Test point 1	Throttle body 6P connector No. 1 (throttle body side)
   Test point 2	Body ground

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

   Is there continuity?

   YES 

   Replace the throttle body .

   NO 

   The throttle body internal circuit is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM , then recheck. If DTC P2118 goes away and the PCM was updated, troubleshooting is complete. If DTC P2118 goes away and the PCM was substituted, replace the original PCM .