How to Troubleshoot Circuits at the ECM/PCM

Special Tools Required

Digital multimeter KS-AHM-32-003 (1) or a commercially available digital multimeter
Backprobe set 07SAZ-001000A (2)

NOTE: The ECM/PCM overwrites data and monitors the EVAP system for up to about 30 minutes after the ignition switch is turned OFF. Jumping the SCS line after turning the ignition switch OFF cancels this function. Disconnecting the ECM/PCM during this function, without jumping the SCS line first, can damage the ECM/PCM.

Connect the backprobe adapters (A) to the stacking patch cords (B), and connect the cords to a digital multimeter (C).

Fig 1: Connecting Backprobe Adapters To Stacking Patch Cords And Connecting Cords To Digital Multimeter
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Using the wire insulation as a guide for the contoured tip of the backprobe adapter, gently slide the tip into the connector from the wire side until it touches the end of the wire terminal.
If you cannot get to the wire side of the connector or the wire side is sealed (A), disconnect the connector and probe the terminals (B) from the terminal side. Do not force the probe into the connector.
NOTE: Do not puncture the insulation on a wire. Punctures can cause poor or intermittent electrical connections.

Fig 2: Disconnecting Connector And Probe Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.