Engine Immobilizer System - Diagnostics: Diagnosis Toyota Matrix E130

HOW TO PROCEED WITH TROUBLESHOOTING

HINT

1. Use this procedure to troubleshoot the engine immobilizer system.
2. The hand-held tester should be used in steps 4 and 6 .

1. VEHICLE BROUGHT TO WORKSHOP NEXT: Go to next step
2. SYMPTOM CHECK AND «CUSTOMER PROBLEM ANALYSIS CHECK»(ref-225890-S01450752722006032300000) ) NEXT: Go to next step
3. CRANK ENGINE FOR MORE THAN 10 SECONDS NEXT: Go to next step
4. CHECK FOR DTC Check for DTCs and note any codes that are output. Delete the DTC. Recheck for DTCs. Based on the DTC output in (a), try to force output of the same SFI system DTC or engine immobilizer system DTC by simulating the operation indicated by the DTC. If the DTC does not reoccur, proceed to A . If the DTC (SFI system) reoccurs, proceed to B . If the DTC (engine immobilizer system) reoccurs, proceed to C . B: Go to SFI SYSTEM (See «DIAGNOSTIC TROUBLE CODE CHART»(/toyota/matrix/e130-2002-2008/remont/testing-diagnostics/#engine-control-system-sfi-1zz-fe4wd-diagnostics) ) (1ZZ-FE (4WD)) or go to SFI SYSTEM (See «SFI SYSTEM (2ZZ-GE)»(/toyota/matrix/e130-2002-2008/remont/testing-diagnostics/#engine-control-system-sfi-2zz-ge-diagnostics) ) C: Go to step 7 A: Go to next step
5. «PROBLEM SYMPTOMS TABLE»(ref-225890-S31682287092006032300000) ) If the fault is not listed on the problem symptoms table, proceed to A. If the fault is listed on the problem symptoms table, proceed to B. B: Go to step 7 A: Go to next step
6. OVERALL ANALYSIS AND TROUBLESHOOTING «PRE-CHECK»(ref-225890-S08641010322006032300000) ) Inspection with the hand-held tester (DATA LIST) Inspection with the hand-held tester (ACTIVE TEST) «TERMINALS OF ECU»(ref-225890-S19098593162006032300000) ) NEXT: Go to next step
7. ADJUST, REPAIR OR REPLACE NEXT: Go to next step
8. CONFIRMATION TEST NEXT: Go to next step END

DIAGNOSTIC TROUBLE CODE CHART

DIAGNOSTIC TROUBLE CODES (DTC) LIST

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1. TRANSPONDER KEY ECU DTC CHART
2. ECM DTC CHART NOTE: The DTC for the immobilizer system is specified. If other codes are output, check the DTC chart of the SFI system.

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1. CHECK TRANSPONDER KEY AMPLIFIER Disconnect the T9 amplifier connector. Measure the resistance of the wire harness side connector. If the result is not as specified, there may be a malfunction on the wire harness side. Reconnect the T9 amplifier connector. Measure the voltage of the connector. If the result is not as specified, the amplifier may have a malfunction. Inspect using an oscilloscope. TERMINAL DESCRIPTION CHART Terminal CODE-GND Tool Setting 2 V/DIV., 20 ms/DIV. Condition No key in ignition key cylinder --> key inserted TERMINAL TXCT-GND CHART Terminal TXCT-GND Tool Setting 2 V/DIV., 20 ms/DIV. Condition No key in ignition key cylinder --> key inserted
2. CHECK TRANSPONDER KEY ECU ASSY Disconnect the T10 ECU connector. Measure the resistance and voltage of the wire harness side connector. If the result is not as specified, there may be a malfunction on the wire harness side. Reconnect the T10 ECU connector. Measure the voltage of the connector. If the result is not as specified, the ECU may have a malfunction. Inspect using an oscilloscope. TERMINAL TXCT-AGND CHART Terminal TXCT-AGND Tool Setting 2V/DIV., 10ms/DIV. Condition No key in ignition key cylinder --> key inserted TERMINAL CODE-AGND CHART Terminal CODE-AGND Tool Setting 2 V/DIV, 20 ms/DIV. Condition No key in ignition key cylinder --> key inserted TERMINAL EFIO-GND Terminal EFIO-GND Tool Setting 10 V/DIV., 100 ms/DIV. Condition Ignition switch OFF --> ON TERMINAL EFII-GND Terminal EFII-GND Tool Setting 10 V/DIV, 100 ms/DIV. Condition Ignition switch OFF --> ON
3. CHECK ECM Measure the resistance and voltage of the connectors. HINT: *1: 1ZZ-FE 4WD *2: Except 1ZZ-FE 4WD If the result is not as specified, the ECM may have a malfunction. Inspect using an oscilloscope. TERMINAL IMO-EOM CHART Terminal IMO-EOM Tool Setting 10V/DIV., 100ms/DIV. Condition Ignition switch ON TERMINAL IMI-EOM CHART Terminal IMI-EOM Tool Setting 10V/DIV., 100ms/DIV. Condition Ignition switch ON

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CIRCUIT DESCRIPTION

This DTC will be output if the key is inserted into the ignition key cylinder, but the transponder key ECU does not detect the ON condition of the unlock warning switch. Normally, inserting the key into the ignition key cylinder turns ON the unlock warning switch, which is then detected by the ECU.

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1. READ DATA LIST (UNLOCK WARNING SWITCH) Check the DATA LIST for proper functioning of the unlock warning switch. OK: ON (key is in ignition key cylinder) appears on the screen. NG: Go to step 2 OK: Go To Next Step REPLACE TRANSPONDER KEY ECU ASSY
2. INSPECT UNLOCK WARNING SWITCH ASSY Remove the unlock warning switch. Measure the resistance of the switch. TESTER CONNECTION SPECIFIED CONDITION CHART (1 OF 2) Tester Connection Switch Condition Specified Condition 1-2 Pushed Below 1 ohm 1 -2 Not pushed 10 kohm or higher NG: REPLACE UNLOCK WARNING SWITCH ASSY OK: Go To Next Step
3. CHECK WIRE HARNESS (UNLOCK WARNING SWITCH ASSY - TRANSPONDER KEY ECU ASSY AND BODY GROUND) Disconnect the U1 switch connector. Disconnect the T10 ECU connector. Measure the resistance of the wire harness side connectors. TESTER CONNECTION SPECIFIED CONDITION CHART (2 OF 2) Tester Connection Specified Condition U1-2-T10-9 (KSW) Below 1 ohm U1-1 -Body ground Below 1 ohm NG: REPAIR OR REPLACE HARNESS AND CONNECTOR OK: Go To Next Step REPLACE TRANSPONDER KEY ECU ASSY

This DTC is detected when the antenna coil is open or short circuit.

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1. READ DATA LIST (ANTENNA COIL) Check the DATA LIST for proper functioning of the antenna coil. OK: NORMAL (antenna coil is normal) appears on the screen. NG: Go to step 2 OK: Go To Next Step REPLACE TRANSPONDER KEY ECU ASSY
2. CHECK WIRE HARNESS (TRANSPONDER KEY ECU ASSY - TRANSPONDER KEY AMPLIFIER) Disconnect the T10 ECU connector. Disconnect the T9 amplifier connector. Measure the resistance of the wire harness side connectors. TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Specified Condition T10-8 (VC5)-T9-1 (VC5) Below 1 ohm T10-11 (CODE) - T9-4 (CODE) Below 1 ohm T10-12 (TXCT) - T9-5 (TXCT) Below 1 ohm T10-13 (AGND) - T9-7 (GND) Below 1 ohm T10-8 (VC5) or T9-1 (VC5) -Body ground 10 kohm or higher T10-11 (CODE) or T9-4 (CODE) -Body ground 10 kohm or higher T10-12 (TXCT) or T9-5 (TXCT) -Body ground 10k ohm or higher T10-13 (AGND) or T9-7 (GND) -Body around 10 kohm or higher NG: REPAIR OR REPLACE HARNESS AND CONNECTOR OK: Go To Next Step REPLACE TRANSPONDER KEY AMPLIFIER

This DTC is output when: 1) during key code registration, a key malfunction occurs; or 2) the key code was unable to be registered properly.

DTC DETECTION CONDITION CHART

INSPECTION PROCEDURE

1. RE-REGISTER KEY Delete the DTC (see «PRE-CHECK»(ref-225890-S08641010322006032300000) ). Re-register the key and insert this key into the ignition key cylinder. Check that the engine starts with the key. OK: Engine starts. NG: REPLACE KEY OK: Go To Next Step END

This DTC is output when a key with an incomplete key code is inserted into the ignition key cylinder.

DTC DETECTION CONDITION CHART

1. RE-REGISTER KEY Delete the DTC (see «PRE-CHECK»(ref-225890-S08641010322006032300000) ). Re-register the key and insert this key into the ignition key cylinder. Check that the engine starts with the key. OK: Engine starts. NG: REPLACE KEY OK: Go To Next Step END

This DTC is output when a key with a key code that has not been registered in the transponder key ECU is inserted into the ignition key cylinder.

DTC DETECTION CONDITION CHART

1. RE-REGISTER KEY Delete the DTC (see «PRE-CHECK»(ref-225890-S08641010322006032300000) ). Re-register the key and insert this key into the ignition key cylinder. Check that the engine starts with the key. OK: Engine starts. NG: REPLACE KEY OK: Go To Next Step END

DTC B2796 is output when a key that does not have a transponder chip is inserted into the ignition key cylinder.

DTC B2798 is output when communication between the key and transponder key ECU is not possible.

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1. READ DATA LIST (IMMOBILIZER SYSTEM) Check the DATA LIST for proper functioning of the immobilizer system. OK: UNSET (ignition switch ON) appears on the screen. NG: Go to step 2 OK: Go To Next Step Go to step 3
2. CHECK WHETHER ENGINE STARTS WITH OTHER KEYS Insert the vehicle's other key into the ignition key cylinder. Check that the engine starts with the key. OK: Engine starts. NG: Go to step 3 OK: Go To Next Step RE-REGISTER OR REPLACE KEY THAT CANNOT START ENGINE
3. READ DATA LIST (ANTENNA COIL) Check the DATA LIST for proper functioning of the antenna coil. OK: NORMAL (antenna coil is normal) appears on the screen. NG: Go to step 4 OK: Go To Next Step Go to step 5
4. CHECK WIRE HARNESS (TRANSPONDER KEY ECU ASSY - TRANSPONDER KEY AMPLIFIER) Disconnect the T10 ECU connector. Disconnect the T9 amplifier connector. Measure the resistance of the wire harness side connectors. TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Specified Condition T10-8 (VC5) - T9-1 (VC5) Below 1 ohm T10-11 (CODE) - T9-4 (CODE) Below 1 ohm T10-12 (TXCT) - T9-5 (TXCT) Below 1 ohm T10-13 (AGND) - T9-7 (GND) Below 1 ohm T10-8 (VC5) or T9-1 (VC5) -Body ground 10 kohm or higher T10-11 (CODE) or T9-4 (CODE) -Body ground 10 kohm or higher T10-12 (TXCT) or T9-5 (TXCT) -Body ground 10 kohm or higher T10-13 (AGND) or T9-7 (GND)- 10 kohm or higher NG: REPAIR OR REPLACE HARNESS AND CONNECTOR OK: Go To Next Step
5. CHECK OPERATION OF TRANSPONDER KEY AMPLIFIER After replacing the transponder key amplifier with a normally functioning transponder key amplifier, check that the engine starts. OK: Engine starts. NG: REPLACE TRANSPONDER KEY ECU ASSY OK: Go To Next Step END (TRANSPONDER KEY AMPLIFIER DEFECTIVE)

This DTC is output when a communication error occurs between the transponder key amplifier and transponder key ECU. A possible reason for the communication error is that noise is occurring on the communication line.

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1. CHECK KEY Check if the ignition key being used is near other ignition keys, as shown in the illustration. Also, check if the key ring is in contact with the key grip. DTC DETECTION CONDITION Result Proceed to Key is near other keys and/or key rings is in contact with key grip. A Key is not near other keys and/or key ring is not in contact with key grip. B B: Go to step 3 A: Go To Next Step
2. CHECK FOR DTCS Separate the keys from each other. Or, remove the key ring. Delete the DTC (see «PRE-CHECK»(ref-225890-S08641010322006032300000) ). Insert a key into the ignition key cylinder. Remove it. Repeat for all the other keys. Check that no code is output. OK: No code is output. NG: Go to step 3 OK: Go To Next Step END
3. CHECK TRANSPONDER KEY AMPLIFIER Using an oscilloscope or the hand-held tester, check the waveform between the terminals of the T9 amplifier and T10 ECU connectors. Check that no noise is included in the waveform (an example of noise is shown in the illustration on the left). OK: Go To Next Step TESTER CONNECTION SPECIFIED CONDITION CHART (1 OF 2) Tester Connection Specified Condition T10-11 (CODE) -T9-4 (CODE) No noise is present NG: FIND CAUSE OF NOISE AND REMOVE IT OK: Go To Next Step
4. CHECK WIRE HARNESS (TRANSPONDER KEY ECU ASSY - TRANSPONDER KEY AMPLIFIER) Disconnect the T10 ECU connector. Disconnect the T9 amplifier connector. Measure the resistance of the wire harness side connectors. TESTER CONNECTION SPECIFIED CONDITION CHART (2 OF 2) Tester Connection Specified Condition T10-11 (CODE)-T9-4 (CODE) Below 1 ohm NG: REPAIR OR REPLACE HARNESS AND CONNECTOR OK: Go To Next Step
5. CHECK OPERATION OF TRANSPONDER KEY AMPLIFIER After replacing the transponder key amplifier, check that the engine starts. OK: Engine starts. NG: REPLACE TRANSPONDER KEY ECU ASSY OK: Go To Next Step END (TRANSPONDER KEY AMPLIFIER DEFECTIVE)

This DTC is output when: 1) the ECM detects errors in its own communications with the transponder key ECU; 2) the ECM detects errors in the communication lines; and 3) the ECU communication ID between the transponder key ECU and the ECM are different.

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HINT

Before troubleshooting for this DTC, make sure no transponder key ECU DTCs are present. If present, troubleshoot the transponder key ECU DTC first.

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1. CHECK WIRE HARNESS (TRANSPONDER KEY ECU ASSY - ECM) Disconnect the T10 ECU connector. Disconnect the E5 ECM connector. Measure the resistance of the wire harness side connectors. TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Specified Condition T10-6 (EFIO)-E5-27 (IMI) Below 1 ohm T10-7 (EFII) - E5-26 (IMO) Below 1 ohm T10-6 (EFIO) or E5-27 (IMI)-Body ground 10 kohm or higher T10-7 (EFII) or E5-26 (IMO)-Body ground 10 kohm or higher NG: REPAIR OR REPLACE HARNESS AND CONNECTOR OK: Go To Next Step REPLACE ECM

This circuit provides power to operate the transponder key ECU.

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1. INSPECT FUSE (ECU-B, AM2, MAIN) Remove the MAIN fuse from the engine room R/B. Remove the ECU-B and AM2 fuses from the instrument panel J/B. Measure the resistance of the fuses. Standard: Below 1 ohm NG: REPLACE FUSE OK: Go To Next Step
2. CHECK WIRE HARNESS (TRANSPONDER KEY ECU ASSY - BATTERY AND BODY GROUND) Disconnect the T10 ECU connector. Measure the resistance and voltage of the wire harness side connector. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR OK: Go To Next Step REPLACE TRANSPONDER KEY ECU ASSY

See also:
• DIAGNOSTIC TROUBLE CODE CHART
• SFI SYSTEM (2ZZ-GE)