DTC CHECK / CLEAR NOTICE: When the diagnosis system is changed from normal mode to check mode or vice versa, all DTCs and freeze frame data recorded in normal mode are cleared. Before changing modes, always check and make a note of DTCs and freeze frame data. HINT:
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CHECK DTC (a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Powertrain / Engine / Trouble Codes. Powertrain > Engine > Trouble Codes(e) Check the DTC(s) and freeze frame data, and then write them down.
(f) Check the details of the DTC(s). Click here
CLEAR DTC (Pending and Confirmed DTC) (a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Powertrain / Engine / Trouble Codes. (e) Clear the DTCs. Powertrain > Engine > Clear DTCsCLEAR DTC (Pending and Confirmed DTC without using Techstream) (a) Perform either of the following operations: NOTICE: After turning engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work. Click here
(1) Disconnect the cable from the negative (-) battery terminal for more than 1 minute. (2) Remove the EFI-MAIN NO. 1 and ETCS fuses from the No. 1 engine room relay block and No. 1 junction block assembly located inside the engine compartment for more than 1 minute. OUTLINE
CLEAR PERMANENT DTC (a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Powertrain / Engine / Trouble Codes. Powertrain > Engine > Trouble CodesHINT: If "PERMANENT" in the top right of the screen displays "YES", permanent DTCs are stored. (e) Select the "Generic" tab. (f) Check if permanent DTCs are stored. HINT: If permanent DTCs are not output, it is not necessary to continue this procedure. (g) Clear the DTCs. Powertrain > Engine > Clear DTCsNOTICE: Do not clear the DTCs or disconnect the cable from the battery terminal after performing this step. (h) Perform the universal trip. HINT: The driving pattern to obtain a normal judgment and the universal trip driving can be performed consecutively in the same driving cycle. ![]() ![]()
(i) Turn the engine switch off and wait for 2 minutes or more. (j) Turn the engine switch on (IG). (k) Enter the following menus: Powertrain / Engine / Trouble Codes. Powertrain > Engine > Trouble Codes(l) Check that the permanent DTCs have been cleared. HINT: If permanent DTCs are not output, it is not necessary to continue this procedure. (m) Perform the normal judgment procedure in the respective confirmation driving pattern of each output DTC. HINT:
(n) Start the engine and wait for 5 seconds or more. (o) Turn the engine switch off and wait for 2 minutes or more. (p) Turn the engine switch on (IG). (q) Enter the following menus: Powertrain / Engine / Trouble Codes. Powertrain > Engine > Trouble Codes(r) Check that the permanent DTCs have been cleared. HINT: If permanent DTCs are not output, it is not necessary to continue this procedure. (s) Perform the normal judgment procedure in the respective confirmation driving pattern of each output DTC. HINT:
(t) Start the engine and wait for 5 seconds or more. (u) Turn the engine switch off and wait for 2 minutes or more. (v) Turn the engine switch on (IG). (w) Enter the following menus: Powertrain / Engine / Trouble Codes. Powertrain > Engine > Trouble Codes(x) Check that the permanent DTCs have been cleared. |
Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Power Steering System(for Gasoline Model): IG Power Supply Voltage (C1551)
DESCRIPTION When a malfunction is detected in the power source circuit, the fail-safe function suspends power assist. DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Return-to-normal Condition Note C1551 IG Power Supply Voltage When the PIG power supply voltage is normal ...