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DTC C1796 APS signal (invalid)
 
 
caution
  • Whenever the ECU is replaced, ensure that the CAN bus lines are normal.
 
 
OPERATION
FCM/LDW/AHB-ECU communicates with the engine control module via the CAN bus lines.
 
 
DIAGNOSTIC FUNCTION AND TROUBLE JUDGMENT
This DTC is set when the abnormality below is detected:
  • The ECU receives an invalid accelerator opening signal from the engine control module.
 
 
TROUBLESHOOTING HINTS
  • Defective Direct Fuel Injection (DFI) and Multiport Fuel Injection (MFI) system (accelerator pedal position sensor)
  • Malfunction of the FCM/LDW/AHB-ECU
 
 
DIAGNOSIS
STEP 1. Using scan tool (M.U.T.-IIISE), read the other system DTC.
Check the engine control module DTC (Refer to GROUP 13A - Troubleshooting/Diagnosis function ).
(1)
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-IIISE).
Connect scan tool (M.U.T.-IIISE). Refer to "How to connect the Scan Tool (M.U.T.-IIISE) ."
(2) Erase the DTC.
(3) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(4) Check if the DTC is set.
Is the DTC set?
Perform the relevant troubleshooting (Refer to GROUP 13A - Troubleshooting/Diagnosis function ).
Go to Step 2.
 
STEP 2. Using scan tool (M.U.T.-IIISE), read the DTC again.
Check again if the DTC is set in the FCM/LDW/AHB-ECU.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3) Check if DTC is set.
Is the DTC set?
Replace the FCM/LDW/AHB-ECU (Refer to ).
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).