Canada - Engine Controls - Error When Reprogramming ECU
Bulletin
0959
Issue Date
2001-05-11
Reference
GI-01-016R
Model
4Runner, Avalon, Camry, Celica, Corolla, Echo, Echo Hatchback, Highlander, Matrix, Prius, RAV4, Sequoia, Sienna, Solara, Solara Convertible, Tacoma, Tundra
Year Range
2001 ~ 2004
Market
Canada
Component
GI, EE
Subject:
ECU FLASH REPROGRAMMING ERROR MESSAGE (REVISION)
During ECU flash reprogramming, an error message may be displayed on the Diagnostic Tester that will not allow ECU flash reprogramming to complete. This bulletin provides test procedures to determine the cause for the error message.
APPLICABLE VEHICLES:
- 2001 (and later) model year 4Runner, Highlander, Land Cruiser, RAV4, Sequoia and Tundra vehicles.
- 2002 (and later) model year Camry, Solara and Tacoma vehicles.
- 2003 (and later) model year Corolla and Matrix vehicles.
- All 2004 (and later) model year Toyota vehicles except Celica, Avalon, and Tacoma 3RZ-FE engine.
REQUIRED SSTs:
TEST PROCEDURE:
During ECU flash reprogramming, the Error screen at right may be displayed on the Diagnostic Tester for one of the following reasons:
1. immobilizer key not properly registered or auto registration mode left open.
2. Ignition ON/OFF cycling not followed correctly during the flash reprogramming procedure.
3. The Diagnostic Tester cable is damaged, causing an open communication circuit.
NOTE:
The Diagnostic Tester may operate properly in other modes such as OBD, OBDII, or CARB, with a damaged cable.
To eliminate the possibility of the first 2 reasons causing the error message, do the following:
1. Confirm the immobilizer Transponder Master Key is properly registered and auto registration mode is closed. Follow the appropriate Repair Manual procedure and consult TSB GI001-035, "Scantool Immobilizer Key Code Utility."
2. Conduct the ECU flash reprogramming process explicitly following key operation instructions.
Refer to TSB GI-01-014 (dated March 16, 2001) for more details.
To determine if the Diagnostic Tester cable is damaged, follow the test procedures below to check the electrical integrity of the cable. Conduct all continuity tests with an Ohm meter. For all five test procedures, the resistance values must be below 6.0 ohms to pass.
CABLE TEST 1.
A. Connect Diagnostic Tester cables DLC (P/N 02001637) and CAN Interface Module / J1962 OBDII together (P/N 01002744).
B. Test for continuity.
- If there is continuity, the cable is OK. Check steps 1 and 2 above to complete the flash reprogramming process.
- If there is no continuity, proceed to CABLE TEST 2.
CABLE TEST 2.
A. Disconnect Diagnostic Tester cables DLC (P/N 02001637) and CAN Interface Module / J1962 OBDII (P/N 01002744).
B. Test DLC cable (P/N 02001637) for continuity.
- If there is continuity, the cable is OK. Proceed to CABLE TEST 3.
- If there is no continuity, the cable needs to be replaced.
CABLE TEST 3.
A. Test J1962 OBDII / CAN Interface Module (P/N 01002744) for continuity.
- If there is continuity, the cable and CAN Interface Module are OK. Re-check Cable Tests 1, 2, and 3 while wiggling and flexing the cables.
- If there is no continuity, proceed to CABLE TEST 4.
CABLE TEST 4.
A. Disconnect the CAN Interface Module (P/N 01002744) from the J1962 OBDII cable using a Phillips screwdriver.
B. Test J1962 OBDII (P/N 02003180) for continuity.
- If there is no continuity, the cable needs to be replaced.
- If there is continuity, proceed to CAN Interface Module Test 5.
CAN INTERFACE MODULE TEST 5.
A. Test the CAN Interface Module (P/N 01002744) for continuity.
- If there is no continuity, the CAN Interface Module needs to be replaced.
- If there is continuity, the CAN Interface Module is OK. Re check Cable Tests 1, 2, 3, and 4 while wiggling and flexing the cables.
NOTE:
Issue of this Technical Service Bulletin is to ensure that proper repair information is available. IT DOES NOT CONSTITUTE AN AUTHORIZATION FOR REPAIR. Normal provisions of the formal warranty policy, as applicable, will apply.