DTC Troubleshooting: C1870-00 (77-01), C1871-00 (77-04), C1872-00 (77-02)
DTC C1870-00: The Functional Abnormalities of Fuel and Emissions
DTC C1871-00: The Functional Abnormalities of Automatic Transmission
DTC C1872-00: The Functional Abnormalities of VSA Modulator-Control Unit
NOTE: Before you troubleshoot, review the General Troubleshooting Information.

DTC Description
DTC
Freeze Frame
C1870-00 The Functional Abnormalities of Fuel and Emissions
    
C1871-00 The Functional Abnormalities of Automatic Transmission
    
C1872-00 The Functional Abnormalities of VSA Modulator-Control Unit
    

1.
Problem verification (DTC check):

Problem verification (DTC 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.
Start the engine.

?5.
Check for DTCs with the HDS.
NOTE: These codes are stored whenever the following systems DTCs are detected.
When DTC C1870-00 is indicated, check the PGM-FI system and CVT system DTC.
When DTC C1871-00 is indicated, check the CVT system DTC.
When DTC C1872-00 is indicated, check the VSA system DTC.

DTC Description
DTC
Freeze Frame
C1870-00 The Functional Abnormalities of Fuel and Emissions
    
C1871-00 The Functional Abnormalities of Automatic Transmission
    
C1872-00 The Functional Abnormalities of VSA Modulator-Control Unit
    

Is DTC C1870-00, C1871-00 and/or C1872-00 indicated?

     
DTC C1870-00 is indicated
     
     
     
The failure is duplicated. Check the PGM-FI system DTC and CVT system DTC.?
     
DTC C1871-00 is indicated
     
     
     
The failure is duplicated. Check the CVT system DTC.?
     
DTC C1872-00 is indicated
     
     
     
The failure is duplicated. Check the VSA system DTC.?
     
DTC is not indicated
     
     
     
Intermittent failure, the system is OK at this time. 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.?