|
|
OPERATION • Terminal number 30 is connected to battery volt- age. For both the ASD and fuel pump relays, termi- • The PCM grounds the coil side of the relay through terminal number 85. • Terminal number 86 supplies voltage to the coil side of the relay. • When the PCM de-energizes the ASD and fuel pump relays, terminal number 87A connects to termi- • When the PCM energizes the ASD and fuel pump relays, terminal 87 connects to terminal 30. TESTING The following procedure applies to the ASD and fuel pump relays. (1) Remove relay from connector before testing. an ohmmeter to check the resistance between termi- (3) Connect the ohmmeter between terminals 30 and 87A. The ohmmeter should show continuity (4) Connect the ohmmeter between terminals 87 and 30. The ohmmeter should not show continuity at (5) Connect one end of a jumper wire (16 gauge or smaller) to relay terminal 85. Connect the other end (6) Connect one end of another jumper wire (16 gauge or smaller) to the power side of the 12 volt WARNING: DO NOT ALLOW OHMMETER TO CON- (7) Attach the other end of the jumper wire to relay terminal 86. This activates the relay. The ohm- (8) Disconnect jumper wires. ity and resistance tests. If the relay passed the tests, THROTTLE BODY MINIMUM AIR FLOW CHECK The following test procedure has been developed to check throttle body calibrations for correct idle condi- A special fixed orifice tool (number 6714) (Fig. 20) must be used for the following test. This tool has a TERMINAL LEGEND NUMBER IDENTIFICATION 30 COMMON FEED 85 COIL GROUND 86 COIL BATTERY 87 NORMALLY OPEN 87A NORMALLY CLOSED Fig. 19 ASD and Fuel Pump Relay Terminals— Type 2 Fig. 20 6714 Fixed Orifice Tool 14 - 42 FUEL SYSTEM XJ DIAGNOSIS AND TESTING (Continued) |