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Check Mode Procedure: Hand-Held Tester

This document provides instructions for using a hand-held tester to check the SFI system in check mode. It describes connecting the tester to the vehicle and switching it to check mode, starting the engine, simulating customer-reported malfunctions, and checking diagnostic trouble codes and freeze frame data. It notes that check mode provides more sensing ability than normal mode to detect issues. It also provides instructions for clearing diagnostic trouble codes using an OBD II scan tool after inspection.

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Clodoaldo Biassio
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43 views1 page

Check Mode Procedure: Hand-Held Tester

This document provides instructions for using a hand-held tester to check the SFI system in check mode. It describes connecting the tester to the vehicle and switching it to check mode, starting the engine, simulating customer-reported malfunctions, and checking diagnostic trouble codes and freeze frame data. It notes that check mode provides more sensing ability than normal mode to detect issues. It also provides instructions for clearing diagnostic trouble codes using an OBD II scan tool after inspection.

Uploaded by

Clodoaldo Biassio
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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05–11

DIAGNOSTICS – SFI SYSTEM (April, 2003)


05CRI–02

CHECK MODE PROCEDURE


HINT:
Hand–held tester only:
Compared to the normal mode, the check mode has more sens-
ing ability to detect malfunctions. Furthermore, the same diag-
nostic items which are detected in the normal mode can also be
detected in the check mode.
1. CHECK MODE PROCEDURE(Using the hand–held
Hand–held Tester tester)
(a) Check the initial conditions.
(1) Battery positive voltage 11 V or more
(2) Throttle valve fully closed
(3) Transmission in the P or N position
DLC3 (4) A/C switched OFF
(b) Turn the ignition switch OFF.
A79121 (c) Connect the hand–held tester to the DLC3.
(d) Turn the ignition switch ON.
(e) Switch the hand–held tester from the normal mode to the
check mode (check that the MIL flashes).
0.13 sec. NOTICE:
ON If the hand–held tester switches the ECM from the normal
mode to the check mode or vice–versa, or if the ignition
switch is turned from ON to ACC or OFF during the check
OFF mode, the DTC and freeze frame data will be erased.
0.13 sec. (f) Start the engine (MIL goes off after the engine starts).
A76900 (g) Simulate the conditions of the malfunction described by
the customer.
NOTICE:
Leave the ignition switch ON until you have checked the
DTC, etc.
(h) After simulating the malfunction conditions, check the
DTC and freeze frame data, etc using the hand–held tes-
ter diagnosis selector.
HINT:
Do not turn the ignition switch OFF, as turning it OFF switches
the diagnosis system from the check mode to the normal mode,
which erases all the DTCs, etc.
(i) After checking the DTC, inspect the applicable circuit.
2. CLEAR DTC (Using the OBD II scan tool or hand–held
tester)
(a) Connect the OBD II scan tool or hand–held tester to the
DLC3.
(b) Turn the ignition switch ON.
(c) Operate the OBD II scan tool or hand–held tester to erase
the codes. All the DTCs and freeze frame data will be
erased. (See the OBD II scan tool’s instruction book for
operating instructions.)

2004 COROLLA (RM1037U)

Author: Date: 176

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