LEMON Manuals: Even more car manuals for everyone
Home >> Audi >> 2010 >> S4 Automatic DCT >> Repair and Diagnosis >> External Pages >> Different car >> Section 191 (Engine Controls (Diagnostics) (H4DOTC)) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P1418 Secondary Air Injection System Control "A" Circuit Shorted >> Wiring Diagram

DTC P1418 Secondary Air Injection System Control "A" Circuit Shorted: Wiring Diagram

WARNING: This page is about a different car, the 2012 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Secondary Air Injection System Control "A" Circuit Shorted - Wiring Diagram
G07665325Courtesy of SUBARU OF AMERICA, INC.
DIAGNOSIS PROCEDURE

Step Check Yes No
1 CHECK HARNESS BETWEEN ECM AND SECONDARY AIR PUMP RELAY CONNECTOR. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the connector from ECM.
  3. Remove the secondary air pump relay.
  4. Measure the voltage between ECM and chassis ground.

    Connector & terminal 

    (B135) No. 27 (+) - Chassis ground (-): 

 Is the voltage 10 V or more? Repair the short circuit to power in the harness between ECM and secondary air pump relay connector. Even if DTC is detected, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.
NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.
scientia non olet · About LEMON Manuals