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DI-463
DIAGNOSTICS - ENGINE (2UZ-FE)
DIDR4-01

CHECK MODE PROCEDURE
HINT:
Hand-held tester only:
Check mode has a higher sensitivity to detect malfunctions and
can detect malfunctions that normal mode cannot detect.
Check mode can also detect all the malfunctions that normal
mode can detect.

Hand-Held Tester 1. CHECK MODE PROCEDURE
(a) Make sure that the items below are true.
(1) Battery positive voltage 11 V or more
(2) Throttle valve fully closed
(3) Transmission in the P or N position
(4) A/C switched OFF
(b) Turn the ignition switch OFF.
(c) Connect the hand-held tester to the DLC3.
DLC3 (d) Turn the ignition switch ON.
CAN VIM D13872

(e) Change the ECM to check mode with the hand-held tes-
ter. Enter the following menus: DIAGNOSIS / EN-
HANCED OBD II / CHECK MODE. Make sure the MIL
0.13 sec. 0.13 sec. flashes as shown in the illustration.
NOTICE:
ON
All DTCs and freeze frame data recorded will be erased if:
1) the hand-held tester is used to change the ECM from
normal mode to check mode or vice-versa; or 2) during
OFF check mode, the ignition switch is turned from ON to ACC
BR3904 or OFF.
(f) Start the engine. The MIL should turn off after the engine
starts.
(g) Simulate the conditions of the malfunction described by
the customer.
(h) After simulating the malfunction conditions, use the
hand-held tester diagnosis selector to check the DTC,
freeze frame data and other data.
(i) After checking the DTC, inspect the applicable circuit.
2. CLEAR DTC (Using the hand-held tester)
(a) Connect the hand-held tester to the DLC3.
(b) Turn the ignition switch ON.
(c) Erase DTCs and freeze frame data with the OBD II scan
tool (complying with SAE J1978) or the hand-held tester.
For the hand-held tester: 1) enter the following menus:
DIAGNOSIS / ENHANCED OBD II / DTC INFO / CLEAR
CODES; and 2) press YES. For the OBD II scan tool, see
its instruction manual.
DI-464
DIAGNOSTICS - ENGINE (2UZ-FE)

3. CLEAR DTC (Not using the hand-held tester)
(a) Remove the EFI No. 1 and ETCS fuses from the engine
room J/B for more than 60 seconds, or disconnect the bat-
tery terminal for more than 60 seconds.
After disconnecting the battery terminal, perform the "INI-
TIALIZE" procedure.

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