Inspection Procedure

HINT:

• If different DTCs related to different systems that have terminal E2 as the ground terminal are output simultaneously, terminal E2 may be open.
• Read freeze frame data using the hand-held tester or the OBDII scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, it is useful to determine whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio was lean or rich, etc. at the time the malfunction occurred.

1. Connect OBD II scan tool or hand-held tester, and read throttle valve opening percentage. 

   PREPARATION: 

   1. Connect the hand-held tester or the OBD II scan tool to the DLC3.
   2. Select the item "DIAGNOSIS/ENHANCED OBD II/DATA LIST/ETCS/THROTTLE POS".

   CHECK: 

   Read the throttle valve opening percentage.

   RESULT: 

   Fig 1: Identifying Position Of Accelerator

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   Fig 2: Accelerator Pedal Operation Table

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   1. B: Check for intermittent problems/(See  PRE-CHECK  ). 
   2. C: Go to next step. 
   3. A: Go to next step. 
2. Check throttle position sensor. 

   PREPARATION: 

   Disconnect the T2 throttle position sensor connector.

   CHECK: 

   Measure the resistance between the terminals of the throttle position sensor.

   OK: 

   Fig 3: Disconnecting T2 Throttle Position Sensor Connector

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   Fig 4: Specified Condition Table

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   NG: Replace throttle position sensor. 

   OK: Go to next step. 

3. Check for open and short in harness and connector between ECM and throttle position sensor. 

   PREPARATION: 

   1. Reconnect the T2 throttle position sensor connector.
   2. Disconnect the E6 ECM connector.

   CHECK: 

   Measure the resistance between the terminals of the E6 ECM connector.

   OK: 

   Fig 5: Disconnecting E6 ECM Connector

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   Fig 6: Specified Condition Table

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   CHECK: 

   Measure the resistance between the terminals of the E6 ECM connector.

   OK: 

   Fig 7: Specified Condition Table

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   NG: Repair or replace harness or connector. 

   OK: Replace ECM (See  COMPONENTS  ). 

4. Check throttle position sensor. 

   PREPARATION: 

   Disconnect the T2 throttle position sensor connector.

   CHECK: 

   Measure the resistance between the terminals of the throttle position sensor.

   OK: 

   Fig 8: Disconnecting T2 Throttle Position Sensor Connector

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   Fig 9: Specified Condition Table

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   NG: Replace throttle position sensor. 

   OK: Go to next step. 

5. Check for open and short in harness and connector between ECM and throttle position sensor. 

   PREPARATION: 

   1. Disconnect the E6 ECM connector.
   2. Disconnect the T2 throttle position sensor connector.

   CHECK: 

   Measure the resistance between the wire harness side connectors.

   OK: 

   Standard: (Check for open): 

   Fig 10: Disconnecting E6 ECM Connector

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   SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   E2 (T2-2) - E2 (E5-28)	Below 1 Ω

   Fig 11: Disconnect T2 Throttle Position Sensor Connector

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   NG: Repair or replace harness or connector. 

   OK: Replace ECM (See  COMPONENTS  ).