Injector System Wiring - Production Changes
86subaru1NUMBER 07-29-86
APPLICABILITY: ALL 1986 MULTI-PORT FUEL INJECTED DATE 10-03-86 VEHICLES INCLUDING TURBO
SUBJECT: INJECTOR SYSTEM WIRING CHANGES THIS BULLETIN IS FOR INFORMATION ONLY
Check Connector IV has been discontinued in production. This connector was located on the firewall above the master cylinder on 4 Door Sedan, 3 Door, Station Wagon models and on the XT Coupe right side strut tower. This change took place with the following VIN's;
4 Door Sedan 215564
3 Door 800079 AND ON
Station Wagon 419359
XT Coupe 305507
NOTE: DIAGRAM INFORMATION ON THE LOCATION OF CHECK CONNECTOR IV CAN BE FOUND IN THE 1986 SUBARU SERVICE MANUAL SECTION 6-2, PAGES 5,6,142 and 143 COVERING ALL MODELS LISTED ABOVE.
The following changes have been made because of check connector IV being discontinued;
^ The injector wires from the electronic control module (ECM) to the engine harness connector plugs are covered by a black plastic shield starting with the following VIN's;
4 Door Sedan 216953 * 238945
3 Door 801364
Station Wagon 421229 * 449576 AND ON
XT Coupe 306075 * 315672
NOTE: * INDICATES SOME VEHICLES BETWEEN THESE VIN'S DO NOT HAVE WIRE SHIELDING.
^ Vehicles with shielded injector wires will be color coded yellow for injectors #1 and #3 and blue for injectors #2 and #4 in the wiring harness from the ECM to the engine harness connector.
^ To troubleshoot the injector system on vehicles without check connector IV, test the injector wires at the ECM connector.
FIGURE 1:
^ Trouble Code (42): Fuel injector, located in the 1986 Subaru Service Manual, section 2-7, pages 105 has changed. See Figure 1.
NOTE: FOR VEHICLES WITHOUT CHECK CONNECTOR IV AND NO WIRING HARNESS MODIFICATIONS. THE NORMAL RESISTANCE VALUE BETWEEN BATTERY HARNESS POSITIVE AND EACH INJECTOR AT THE ECM CONNECTOR IS 2-3 OHMS.
FOR VEHICLES WITHOUT CHECK CONNECTOR IV AND HAVING SHIELDED WIRES THE NORMAL RESISTANCE VALUE BETWEEN BATTERY POSITIVE AND EACH INJECTOR AT THE ECM CONNECTOR IS 1.0-1.5 OHMS.