Suzuki Samurai IAT Sensor Wiring Diagram - ECM B15/B21 Terminals, Gr/Y Wire

This document is a wiring diagram excerpt covering the Intake Air Temperature (IAT) sensor circuit. It shows the ECM (item 1) connected to the IAT sensor (item 2) through a coupler (item 3) via two wires: an "R/B" wire from the circuit near ECM terminal B21 and a "Gr/Y" wire from ECM terminal B15. Item 4 identifies the ECM coupler and item 5 indicates a branch going "to other sensors." A pin-grid illustration of the ECM coupler shows the physical locations of terminals B15 and B21 for probing or inspection. A troubleshooting note explains that when diagnostic Code Nos. 14 and 21 are indicated together, the likely cause is an open in the "Gr/Y" wire or a poor connection at the B15 terminal. A reader can learn the IAT sensor wire colors (R/B and Gr/Y), the relevant ECM terminals (B15 and B21), where those terminals sit on the ECM connector, and a specific diagnostic tip for interpreting simultaneous trouble codes 14 and 21. The document itself does not state a year, make, or model; it was uploaded as applying to a 1986 Suzuki Samurai.