LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2015 >> Avalon Hybrid Limited >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Control System - Diagnostic Codes (8 Of 8) - Symptom & Circuit Tests - (Hybrid) >> Hybrid Control System >> Circuit Tests >> ECU Power Source Circuit [10/2015 - ] >> Procedure

ECU Power Source Circuit [10/2015 - ]: Procedure

  1. CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY (+B1, +B2 VOLTAGE) 
    1. Turn the power switch on (IG).
    2. Measure the voltage according to the value(s) in the table below.
      GTY540073Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Hybrid Vehicle Control ECU Assembly)

      Standard Voltage

      Tester Connection Condition Specified Condition
      A68-4 (+B1) - Body ground Power switch on (IG) 11 to 14 V
      A67-1 (+B2) - Body ground Power switch on (IG) 11 to 14 V
    3. Turn the power switch off.

    Result: 

    NG 

    See step  3

    Result: 

    OK 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - BODY GROUND) 
    1. Disconnect the D135 and D136 hybrid vehicle control ECU assembly connectors.
    2. Measure the resistance according to the value(s) in the table below.
      GTY575663Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Rear view of wire harness connector
      (to Hybrid Vehicle Control ECU Assembly)

      Standard Resistance

      Tester Connection Condition Specified Condition
      D135-5 (E01) - Body ground Always Below 1 Ω
      D135-6 (E1) - Body ground Always Below 1 Ω
      D136-4 (E12) - Body ground Always Below 1 Ω
      D136-5 (E02) - Body ground Always Below 1 Ω
    3. Reconnect the D135 and D136 hybrid vehicle control ECU assembly connectors.

    Result: 

    OK 

    GO TO PROBLEM SYMPTOMS TABLE 

    (Refer to PROBLEM SYMPTOMS TABLE [10/2015 - ] )

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  3. CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY (MREL VOLTAGE) 
    1. Turn the power switch on (IG).
    2. Measure the voltage according to the value(s) in the table below.
      GTY563032Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Hybrid Vehicle Control ECU Assembly)

      Standard Voltage

      Tester Connection Condition Specified Condition
      A68-6 (MREL) - Body ground Power switch on (IG) 11 to 14 V
    3. Turn the power switch off.

    Result: 

    NG 

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY 

    (Refer to COMPONENTS [10/2015 - ] )

    Result: 

    OK 

    See step  4

  4. CHECK FUSE (PM IGCT) 
    1. Remove the PM IGCT fuse from the No. 2 engine room relay block.
      GTY319393Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      PM IGCT fuse terminals Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *1 No. 2 Engine Room Relay Block
      *2 PM IGCT Fuse
    3. Install the PM IGCT fuse.

    Result: 

    NG 

    See step  13

    Result: 

    OK 

    See step  5

  5. CHECK FUSE (IGCT-MAIN) 
    1. Remove the IGCT-MAIN fuse from the No. 2 engine room relay block.
      GTY544432Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      IGCT-MAIN fuse terminals Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *1 No. 2 Engine Room Relay Block
      *2 IGCT-MAIN Fuse
    3. Install the IGCT-MAIN fuse.

    Result: 

    NG 

    See step  15

    Result: 

    OK 

    See step  6

  6. INSPECT RELAY (IGCT) 
    1. Remove the IGCT relay from the No. 2 engine room relay block.
    2. Measure the resistance according to the value(s) in the table below.
      GTY372995Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      3 - 5 Auxiliary battery voltage is not applied between terminals 1 and 2 10 kΩ or higher
      Auxiliary battery voltage is applied between terminals 1 and 2 Below 1 Ω
      TEXT IN ILLUSTRATION

      *1 IGCT Relay
    3. Install the IGCT relay.

    Result: 

    NG 

    REPLACE RELAY (IGCT) 

    Result: 

    OK 

    See step  7

  7. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - NO. 2 ENGINE ROOM RELAY BLOCK) 
    1. Remove the PM IGCT fuse from the No. 2 engine room relay block.
      GTY319393Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 No. 2 Engine Room Relay Block
      *2 PM IGCT Fuse
    2. Disconnect the A67 and A68 hybrid vehicle control ECU assembly connectors.
    3. Measure the resistance according to the value(s) in the table below.
      GTY601587Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 No. 2 Engine Room Relay Block *2 PM IGCT Fuse
      *a Rear view of wire harness connector
      (to Hybrid Vehicle Control ECU Assembly)      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      A68-4 (+B1) - 2 (PM IGCT fuse) Always Below 1 Ω
      A67-1 (+B2) - 2 (PM IGCT fuse) Always Below 1 Ω
    4. Install the PM IGCT fuse.
    5. Reconnect the A67 and A68 hybrid vehicle control ECU assembly connectors.

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  8

  8. CHECK HARNESS AND CONNECTOR (NO. 2 ENGINE ROOM RELAY BLOCK) 
    1. Remove the IGCT-MAIN fuse and PM IGCT fuse from the No. 2 engine room relay block.
      GTY315276Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 No. 2 Engine Room Relay Block
      *2 PM IGCT Fuse
      *3 IGCT-MAIN Fuse
    2. Remove the IGCT relay from the No. 2 engine room relay block.
    3. Measure the resistance according to the value(s) in the table below.
      GTY319510Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      3 (IGCT relay) - 2 (IGCT-MAIN fuse) Always Below 1 Ω
      5 (IGCT relay) - 1(PM IGCT fuse) Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *1 No. 2 Engine Room Relay Block
      *2 PM IGCT Fuse
      *3 IGCT Relay
      *4 IGCT-MAIN Fuse
    4. Install the IGCT-MAIN fuse and PM IGCT fuse.
    5. Install the IGCT relay.

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  9

  9. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - NO. 2 ENGINE ROOM RELAY BLOCK) 
    1. Remove the IGCT relay from the No. 2 engine room relay block.
    2. Disconnect the A68 hybrid vehicle control ECU assembly connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY574677Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 No. 2 Engine Room Relay Block *2 IGCT Relay
      *a Rear view of wire harness connector
      (to Hybrid Vehicle Control ECU Assembly)      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      A68-6 (MREL) - 1 (IGCT relay) Always Below 1 Ω
      A68-6 (MREL) or 1 (IGCT relay) - Body ground and other terminals Always 10 kΩ or higher
    4. Install the IGCT relay.
    5. Reconnect the A68 hybrid vehicle control ECU assembly connector.

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  10

  10. CHECK HARNESS AND CONNECTOR (NO. 2 ENGINE ROOM RELAY BLOCK - BODY GROUND) 
    1. Remove the IGCT relay from the No. 2 engine room relay block.
    2. Measure the resistance according to the value(s) in the table below.
      GTY449404Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      2 (IGCT relay) - Body ground Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *1 No. 2 Engine Room Relay Block
      *2 IGCT Relay
    3. Install the IGCT relay.

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  11

  11. CHECK HARNESS AND CONNECTOR (ENGINE ROOM RELAY BLOCK AND JUNCTION BLOCK ASSEMBLY - NO. 2 ENGINE ROOM RELAY BLOCK) 
    1. Remove the IGCT-MAIN fuse from the No. 2 engine room relay block.
    2. Disconnect the AMD terminal from the engine room relay block and junction block assembly.
    3. Measure the resistance according to the value(s) in the table below.
      GTY544532Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Engine Room Relay Block and Junction Block Assembly *2 No. 2 Engine Room Relay Block
      *3 IGCT-MAIN Fuse - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      1P-1 (AMD) - 1 (IGCT-MAIN fuse) Always Below 1 Ω
    4. Install the IGCT-MAIN fuse.
    5. Connect the AMD terminal.

    Result: 

    OK 

    CHECK FOR INTERMITTENT PROBLEMS 

    (Refer to CHECK FOR INTERMITTENT PROBLEMS [10/2014 - ] )

    Result: 

    NG 

    See step  12

  12. CHECK FUSIBLE LINK BLOCK ASSEMBLY (R/B NO. 2) 
    1. Check the fusible link block assembly (R/B NO. 2) in the engine room relay block and junction block assembly for improper installation.

      OK

      The fusible link is installed securely.

    2. Remove the fusible link block assembly from the engine room relay block and junction block assembly.
    3. Measure the resistance according to the value(s) in the table below.
      GTY320981Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      1 - 2 Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *1 Fusible Link Block Assembly
    4. Install the fusible link block assembly.

    Result: 

    OK 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    NG 

    REPLACE FUSIBLE LINK BLOCK ASSEMBLY (R/B NO. 2) 

  13. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - NO. 2 ENGINE ROOM RELAY BLOCK) 
    1. Disconnect the B60 shift lever position sensor connector.
    2. Remove the PM IGCT fuse from the No. 2 engine room relay block.
      GTY319393Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 No. 2 Engine Room Relay Block
      *2 PM IGCT Fuse
    3. Disconnect the A67 and A68 hybrid vehicle control ECU assembly connectors.
    4. Measure the resistance according to the value(s) in the table below.
      GTY583651Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 No. 2 Engine Room Relay Block *2 PM IGCT Fuse
      *a Rear view of wire harness connector
      (to Hybrid Vehicle Control ECU Assembly)      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      A68-4 (+B1) or 2 (PM IGCT fuse) - Body ground and other terminals Always 10 kΩ or higher
      A67-1 (+B2) or 2 (PM IGCT fuse) - Body ground and other terminals Always 10 kΩ or higher
    5. Install the PM IGCT fuse.
    6. Reconnect the B60 shift lever position sensor connector.
    7. Reconnect the A67 and A68 hybrid vehicle control ECU assembly connectors.

    Result: 

    OK 

    REPLACE FUSE (PM IGCT) 

    Result: 

    NG 

    See step  14

  14. REPAIR OR REPLACE HARNESS OR CONNECTOR 

    NEXT 

    REPLACE FUSE (PM IGCT) 

  15. CHECK HARNESS AND CONNECTOR (NO. 2 ENGINE ROOM RELAY BLOCK) 
    1. Remove the IGCT-MAIN fuse and PM IGCT fuse from the No. 2 engine room relay block.
      GTY315276Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 No. 2 Engine Room Relay Block
      *2 PM IGCT Fuse
      *3 IGCT-MAIN Fuse
    2. Remove the IGCT relay from the No. 2 engine room relay block.
    3. Measure the resistance according to the value(s) in the table below.
      GTY319510Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      3 (IGCT relay) or 2 (IGCT-MAIN fuse) - Body ground and other terminals Always 10 kΩ or higher
      5 (IGCT relay) or 1(PM IGCT fuse) - Body ground and other terminals Always 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 No. 2 Engine Room Relay Block
      *2 PM IGCT Fuse
      *3 IGCT Relay
      *4 IGCT-MAIN Fuse
    4. Install the IGCT-MAIN fuse and PM IGCT fuse.
    5. Install the IGCT relay.

    Result: 

    OK 

    REPLACE FUSE (IGCT-MAIN) 

    Result: 

    NG 

    See step  16

  16. REPAIR OR REPLACE HARNESS OR CONNECTOR 

    NEXT 

    REPLACE FUSE (IGCT-MAIN) 

scientia non olet · About LEMON Manuals