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Home >> Toyota >> 2005 >> Land Cruiser >> Repair and Diagnosis >> Engine Performance >> System >> Engine - Diagnostics >> Circuit Inspection >> Cranking Hold Function Circuit >> Inspection Procedure >> OBD II Scan Tool (Excluding Hand-Held Tester):

OBD II Scan Tool (Excluding Hand-Held Tester):

  1. Check operation of engine cranking. 

    CHECK: 

    When turning the ignition switch to the ST position, check whether the starter motor starts.

    1. OK: Check for intermittent problems (See  PRE-CHECK   ). 
    2. NG: Go to next step. 
  2. Check voltage between terminal STSW, STAR, STA and E1 of ECM connector. 

    CHECK: 

    Measure the voltage between the terminals of E5, E6 and E7 ECM connectors, while cranking the engine (ignition switch START position).

    OK: 

    ECM CONNECTOR TERMINALS VOLTAGE

    Tester Connection Specified Condition
    STA (E5-17) - E1 (E7-1) 9 to 14 V
    STAR (E6-9) - E1 (E7-1) 9 to 14 V
    STSW (E7-12) - E1 (E7-1) 9 to 14 V
    Fig 1: Identifying ECM Connectors
    G03069938Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    RESULT: 

    ECM CONNECTOR TERMINALS VOLTAGE

    Terminal STA Terminal STAR Terminal STSW Proceed to
    9 to 14 V 9 to 14 V 9 to 14 V A
    0 V 9 to 14 V 9 to 14 V B
    0 V 0 V 9 to 14 V C
    0 V 0 V 0 V D
    1. B: Go to step   7 . 
    2. C: Replace ECM (See  ENGINE CONTROL MODULE (ECM)  ). 
    3. D : Go to step   8 . 
    4. A: Go to next step. 
  3. Check  STARTER RELAY  . 
    1. NG: Replace starter relay. 
    2. OK: Go to next step. 
  4. Check for open and short in harness and connector between park/neutral position switch and starter relay, starter relay and body ground (See  HOW TO USE THE DIAGNOSTIC TABLE AND INSPECTION  ). 
    1. NG: Repair or replace harness or connector. 
    2. OK: Go to next step. 
  5. Check engine room R/B (Starter relay voltage). 

    PREPARATION: 

    Remove the starter relay from the engine room R/B.

    CHECK: 

    Measure the voltage between the terminal of the engine room R/B and body ground.

    OK: 

    STARTER RELAY TERMINAL VOLTAGE

    Tester Connection Specified Condition
    Starter relay (5) - Body ground 9 to 14 V
    Fig 2: Identifying Starter Relay Connectors
    G03069939Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Check and repair harness and connector between starter relay and battery (See  HOW TO USE THE DIAGNOSTIC TABLE AND INSPECTION  ). 
    2. OK: Go to next step. 
  6. Check starter (See  TEST  ). 
    1. NG: Repair or replace starter. 
    2. OK: Check and repair harness and connector between starter relay and starter, starter and battery (See  HOW TO USE THE DIAGNOSTIC TABLE AND INSPECTION  ). 
  7. Check park/neutral position switch. 

    PREPARATION: 

    Remove the P1 park/neutral position switch connector.

    CHECK: 

    Check continuity between each terminal shown SWITCH POSITION AND TERMINALS NUMBER  below when the shift lever is moved to each range.

    SWITCH POSITION AND TERMINALS NUMBER

    Shift range Terminal No. to continuity
    P 1 - 3 6 - 9
    R 2 - 3 -
    N 3 - 5 6 - 9
    D 3 - 7 -
    2 3 - 4 -
    L 3 - 8 -
    Fig 3: Identifying Park/Neutral Position Switch Connector
    G03069940Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: 

    There is continuity. 

    1. NG: Replace the park/neutral position switch. 
    2. OK: Check and repair harness and connector between park/neutral position switch and ECM (See  HOW TO USE THE DIAGNOSTIC TABLE AND INSPECTION  ). 
  8. Check ignition switch. 

    PREPARATION: 

    1. Remove the lower finish panel.
    2. Disconnect the ignition switch connector.

    CHECK: 

    Check continuity between terminals shown below.

    OK: 

    SWITCH POSITION AND TERMINALS NUMBER

    Switch Position Terminal No. to continuity
    LOCK - -
    ACC 2 - 3 -
    ON 2 - 3 - 4 6 - 7
    START 1 - 2 - 4 6 - 7 - 8
    Fig 4: Identifying Ignition Switch Connector & Switch Position
    G03069941Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Replace ignition switch. 
    2. OK: Check and replace harness and connector between ECM and ignition switch, ignition switch and battery (See  HOW TO USE THE DIAGNOSTIC TABLE AND INSPECTION  ). 
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