What relay types are shown on this Nissan standardized relay chart?

Four types are shown: 1T, 1M (in two outer-view variants), 2M, and 1M·1B, each with its outer view, internal circuit, terminal symbol layout, and case color.

What case color is each standardized relay type?

Type 1T is black; type 1M is blue (guide-pin version) or black (flat-terminal version); type 2M is brown; and type 1M·1B is gray.

How many terminals does the 2M relay have and how is it arranged?

The 2M relay has six terminals. The coil is between terminals 1 and 2, with two contacts, and the connector face terminal layout is 2 1 / 6 5 / 4 3.

How can I tell a 1M relay apart from the others?

The 1M relay has four terminals (layout 2 4 1 / 3 or 4 2 / 3 1), a blue or black case, and one version includes a guide pin on the body.

What manual section is this page from?

The page number EL-4 indicates it is from the EL (Electrical) section, and it carries illustration reference SEL451C.

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Nissan Standardized Relay Chart EL-4 - 1T, 1M, 2M, 1M-1B Types & Case Colors

Standardized relay identification chart: type, outer view, circuit, symbols and case color

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Electrical reference page EL-4 chart matching relay types (1T, 1M, 2M, 1M-1B) to their outer view, circuit, terminal symbols and case color (black/blue/brown/gray).

AI caption February 2006 · Photo 351 of 412

This is a scanned page (EL-4) from a Nissan service manual's Electrical System section titled "Standardized Relay." It presents a reference table identifying the four standardized relay types used in the vehicle: 1T, 1M, 2M, and 1M·1B. For each relay type, the table provides four pieces of identifying information: an outer view drawing with numbered terminal callouts (and a "Guide pin" noted on the 1M type), an internal circuit schematic showing the coil and contact arrangement between numbered terminals, a "Symbols" column showing the terminal numbering pattern as seen on the connector face, and the case color used to distinguish each relay. Type 1T has a black case, type 1M comes in blue (with guide pin) and black (flat-blade terminal) versions, type 2M has a brown case, and type 1M·1B has a gray case. The 1T is a 5-terminal changeover-style relay, the 1M is a 4-terminal single-contact relay, the 2M is a 6-terminal dual-contact relay, and the 1M·1B is a 6-terminal relay combining a make contact and a break/changeover contact. Illustration reference SEL451C appears at the bottom. This page helps a reader identify relays by shape, color, and terminal layout when troubleshooting.

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Frequently asked questions

What relay types are shown on this Nissan standardized relay chart?: Four types are shown: 1T, 1M (in two outer-view variants), 2M, and 1M·1B, each with its outer view, internal circuit, terminal symbol layout, and case color.
What case color is each standardized relay type?: Type 1T is black; type 1M is blue (guide-pin version) or black (flat-terminal version); type 2M is brown; and type 1M·1B is gray.
How many terminals does the 2M relay have and how is it arranged?: The 2M relay has six terminals. The coil is between terminals 1 and 2, with two contacts, and the connector face terminal layout is 2 1 / 6 5 / 4 3.
How can I tell a 1M relay apart from the others?: The 1M relay has four terminals (layout 2 4 1 / 3 or 4 2 / 3 1), a blue or black case, and one version includes a guide pin on the body.
What manual section is this page from?: The page number EL-4 indicates it is from the EL (Electrical) section, and it carries illustration reference SEL451C.