ECM - Relay (Type 1M) Green or Blue Precautions

Classification:
EC93-016

Reference:
NTB93-176

Date:
November 29, 1993

GREEN OR BLUE (TYPE 1M) RELAY CAUTION

APPLIED VEHICLE(S):
All Models

SERVICE INFORMATION

When servicing a customer's vehicle, exercise caution when diagnosing / checking at any green or blue colored relay (type 1M, 1 make-normally open relay).

SERVICE PROCEDURE

When diagnosing at any green or blue colored relay (type 1M, 1 make-normally open relay), observe the following cautions to prevent damage to the Engine Control Module (ECM):





1. Note that the schematic on the fuel pump relay is rotated 90 degrees from the orientation of the relay terminals in the relay connector (see diagram):

2. Exercise caution to ensure that the correct terminals are being probed at the relay connector during diagnosing / checking.

Note:
If terminals 2 or 3 (battery voltage) are connected to terminal 1, the ECM will become damaged if the circuit being tested has terminal 1 connected to the ECM.