[Previous][Next]
DTC P170E: ASC Error Information
 
 
 
 
DIAGNOSTIC FUNCTION
The TCM determines that a fault has occurred when it receives an error signal from the ASC-ECU.
 
 
DESCRIPTIONS OF MONITOR METHODS
TCM receives an error signal from the ASC-ECU
 
 
MONITOR EXECUTION
Continuous
 
 
MONITOR EXECUTION CONDITIONS (OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC stored in memory for the item monitored below)
  • Not applicable
Sensor (The sensor below is determined to be normal)
  • Not applicable
 
 
LOGIC FLOW CHARTS (Monitor Sequence)
 
 
DTC SET CONDITIONS
Check Conditions
  • Time after TCM start: more than 0.7 second
  • Voltage of battery: 10 volts or more
  • Voltage of battery: 16.5 volts or less
Judgment Criteria
  • TCM receives ASC status malfunction signal from the ASC-ECU for 2.5 seconds.
 
 
OBD-II DRIVE CYCLE PATTERN
Ignition switch: "ON" position (start the engine and keep it for 10 seconds or more)
 
 
PROBABLE CAUSES
  • Malfunction of the CAN bus line
  • Malfunction of ASC system
  • Malfunction of TCM
 
 
DIAGNOSIS
Required Special Tools:
  • MB992744: Vehicle communication interface-Lite (V.C.I.-Lite)
  • MB992745: V.C.I.-Lite main harness A
  • MB992747: V.C.I.-Lite USB cable short
  • MB992748: V.C.I.-Lite USB cable long
  • MB991958: Scan Tool (M.U.T.-III Sub Assembly)
    • MB991824: Vehicles Communication Interface (V.C.I.)
    • MB991827: M.U.T.-III USB Cable
    • MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)
caution
  • If there is any problem in the CAN bus lines, an incorrect DTC may be stored. Prior to this diagnosis, diagnose the CAN bus lines.
  • Before replacing the ECU, ensure that the CAN bus line is normal.
STEP 1. Using scan tool (M.U.T.-III), diagnose the CAN bus lines.
cautionTo prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III).
Using scan tool (M.U.T.-III), perform CAN bus diagnosis [Refer to GROUP 54C, Explanation About The Scan Tool (M.U.T.-III) Can Bus Diagnostics ].
Is the check result normal?
Go to Step 3.
Repair the CAN bus lines (Refer to GROUP 54C, Diagnosis - Can Bus Diagnostic Table ). Then go to Step 2.
 
STEP 2. Using scan tool (M.U.T.-III), DTC recheck after repairing CAN bus lines.
Check again if the DTC is stored.
(1) Erase the DTC.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) Carry out a test drive with the OBD-II drive cycle pattern.
(4) Recheck the DTC.
Is DTC P170E stored?
Go to Step 3.
This diagnosis is complete.
 
STEP 3. Using scan tool (M.U.T.-III), check the DTC.
Using scan tool (M.U.T.-III), check if the DTC other than P170E is stored.
Is any DTC other than P170E stored?
Perform diagnosis for the relevant DTC (Refer to ). Then go to Step 6
Go to Step 4.
 
STEP 4. Using scan tool (M.U.T.-III), check the DTC of other system.
Using scan tool (M.U.T.-III), check if the DTC is stored in ASC-ECU (Refer to GROUP 35C, Diagnosis - Diagnostic Function - How to Read and Erase Diagnostic Trouble Codes ).
Is any DTC stored?
Perform the ASC system diagnosis (Refer to GROUP 35C, Diagnosis - Diagnostic Trouble Code Chart ). Then go to Step 6
Go to Step 5.
 
STEP 5. Using scan tool (M.U.T.-III), recheck the DTC.
Check again if the DTC is stored.
(1) Erase the DTC.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) Carry out a test drive with the OBD-II drive cycle pattern.
(4) Recheck the DTC.
Is DTC P170E stored?
Replace the TCM (Refer to ). Then go to Step 6
The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).
 
STEP 6. Using scan tool (M.U.T.-III), recheck the DTC.
Check again if the DTC is stored.
(1) Erase the DTC.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) Carry out a test drive with the OBD-II drive cycle pattern.
(4) Recheck the DTC.
Is DTC P170E stored?
Return to Step 1.
This diagnosis is complete.