DTC Troubleshooting: P2118
DTC P2118: Throttle Actuator Current Range/Performance Problem
NOTE: Before you troubleshoot, review the general troubleshooting information.

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

1.
Problem verification:

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
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 on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot.?
2.
Open wire check (SG THL line):

Open wire check (SG THL 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 No. 1 (96P)
Throttle body 6P connector

?4.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
PCM connector No. 1 (96P): disconnected
 
Throttle body 6P connector: disconnected
Test point 1
Throttle body 6P connector (female terminals) No. 3:
Test point 2
PCM connector No. 1 (96P) No. 23


Is there continuity?

     
YES
     
     
     
The SG THL wire is OK. Go to step 3.
     
NO
     
     
     
Repair an open in the SG THL wire between PCM connector No. 1 terminal No. 23 and the throttle body.?
3.
Shorted wire check (MTR1 line to MTR2 line):

Shorted wire check (MTR1 line to MTR2 line)
?1.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
PCM connector No. 1 (96P): disconnected
 
Throttle body 6P connector: disconnected
Test point 1
Throttle body 6P connector (female terminals) No. 1:
Test point 2
Throttle body 6P connector (female terminals) No. 2:


Is there continuity?

     
YES
     
     
     
Repair a short in the MTR1 wire to the MTR2 wire between PCM connector No. 1 terminals (No. 3, No. 8) and the throttle body.?
     
NO
     
     
     
Go to step 4.
4.
Shorted wire check (MTR1 line, MTR2 line):

Shorted wire check (MTR1 line, MTR2 line)
?1.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
PCM connector No. 1 (96P): disconnected
 
Throttle body 6P connector: disconnected
Test point 1
Throttle body 6P connector (female terminals) No. 1 and No. 2:
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
Repair a short in the MTR1 wire and/or the MTR2 wire between PCM connector No. 1 terminals (No. 3, No. 8) and the throttle body.?
     
NO
     
     
     
The MTR1 wire and the MTR2 wire are not shorted. Go to step 5.
5.
Open wire check (MTR1 line, MTR2 line):

Open wire check (MTR1 line, MTR2 line)
?1.
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:


?2.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
PCM connector No. 1 (96P): disconnected
 
Throttle body 6P connector: disconnected
 
Throttle body 6P connector No. 1 and No. 2: jumped
Test point 1
PCM connector No. 1 (96P) No. 3
Test point 2
PCM connector No. 1 (96P) No. 8

Is there continuity?

     
YES
     
     
     
The MTR1 wire and the MTR2 wire are OK. Go to step 6.
     
NO
     
     
     
Repair an open in the MTR1 wire and/or the MTR2 wire between PCM connector No. 1 terminals (No. 3, No. 8) and the throttle body.?
6.
Throttle body internal circuit check (short in wires):

Throttle body internal circuit check (short in wires)
?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 No. 1 (96P): 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):


Is there about 1.2 ??1.0 k??

     
YES
     
     
     
Go to step 7.
     
NO
     
     
     
7.
Throttle body internal circuit check (short to ground):

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 No. 1 (96P): disconnected
 
Throttle body 6P connector: disconnected
Test point 1
Throttle body 6P connector (male terminals) No. 1 (throttle body side) and No. 2 (throttle body side):
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
     
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 P2118 goes away and the PCM was substituted, replace the original PCM.?