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WesTech Technical Information - Peugeot Code Retrieval
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Peugeot Code Retrieval

Accessing Diagnostic Trouble Codes

Connect jumper harness tool No. 91-41, or equivalent, to pin No.1 of connector M720 (green two-pin connector, located at right rear corner of engine compartment). Connect other end of jumper harness to a vehicle ground.

Diagnostic trouble codes will be displayed through flashing of the "Check Engine" lamp on the instrument cluster. All defects detected by the Motronic ECU can be stored in memory simultaneously.

Turn ignition key to "On" position, then depress jumper harness switch for three seconds. When the switch is released, the "Check Engine" lamp will flash one time, then it will remain off for 1-5 seconds, then the lamp will flash two more times. This flashing pattern is indicative of diagnostic trouble code No. 12 (beginning of test sequence). Wait for the "Check Engine" lamp to come on, then depress jumper harness switch for three seconds. Any diagnostic trouble codes stored in ECU memory will be displayed. The "Fuel Pump Relay" (DTC 15), "Idle Regulation Valve" (DTC 22) and "Engine Speed Sensor" (DTC 41) are classified as minor defects and the Check Engine light will not illuminate if a fault is detected. Repeat previous step to display all diagnostic trouble codes. Diagnostic trouble code No. 11 (end of test sequence) indicates that all detected DTC's have been displayed.

Clearing Diagnostic Trouble Codes

  1. After repairs have been completed, retrieve all diagnostic trouble codes until DTC No. 11 is displayed.
  2. Depress jumper harness switch for more than 10 seconds.
  3. ECU memory is now cleared and "Check Engine" lamp will be off.

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