Inspection Procedure Using Toyota Hand Held Tester

PROCEDURE USING TOYOTA HAND HELD TESTER
1. Check Fuel Pump operation.
^ Be sure that enough fuel is in the tank.





^ Turn Ignition Switch ON. Using jumper connect terminals FP and + B of Data Link Connector 1 (SST 09843-18020).
^ Check that pulsation damper screw rises up when terminals are connected.
^ If not OK proceed to step 2.
^ If OK proceed to step 4.
2. Check Engine Control Module power source circuit.
^ If OK proceed to step 3.
^ If not OK repair or replace.
3. Check Fuel Pump
^ If OK check for open in harness and connector between terminal FP of Data Link Connector 1 and Fuel Pump, Fuel Pump and body ground
^ If not OK repair or replace Fuel Pump.
4. Connect the TOYOTA hand-held tester and check operation of Fuel Pump.
^ Remove the fuse cover on the instrument panel.





^ Connect the TOYOTA hand-held tester to the Data Link Connector 3.
^ Turn Ignition Switch ON and TOYOTA hand-held tester main switch ON. Select the active test mode on the TOYOTA hand-held tester.
^ Check that pulsation damper screw rises up when Fuel Pump is on by TOYOTA hand-held tester.
^ If not OK proceed to step 5.
^ If OK proceed to step 7.
5. Check Circuit Opening Relay.
^ Remove Circuit Opening Relay from Relay Box No. 6.





^ Apply battery voltage between terminals 2 and 4.
^ Measure voltage between terminals 1 and 4.

Terminals 1 and 4: same as battery voltage.

^ If OK proceed to step 6.
^ If not OK replace Circuit Opening Relay.
6. Check voltage between terminal FC of Engine Control Module and body ground.
^ Remove glove compartment.
^ Turn Ignition Switch ON.





^ Measure voltage between terminal FC of Engine Control Module and body ground.

Voltage: 9 - 14 volts.

^ If OK check and replace Engine Control Module
^ If not OK check for open in harness and connector between EFI Main Relay and Circuit Opening Relay, Circuit Opening Relay and Engine Control Module.
7. Check Circuit Opening Relay.
^ Remove glove compartment.
^ Remove Circuit Opening Relay from Relay Box No. 6.





^ Apply battery voltage between terminals 3 and 6. Check continuity between terminals 1 and 2.

Terminals 1 and 2: continuity.

^ If OK proceed to step 8.
^ If not OK replace Circuit Opening Relay.
8. Check voltage between terminal 3 of Relay Box No. 6 (for Circuit Opening Relay) and body ground.





^ Measure voltage between terminal 3 of Relay Box No. 6 (for Circuit Opening Relay) and body ground when engine is cranked.

Voltage: 9 - 14 volts.

^ If OK check for open in harness and connector between terminal 6 of Relay Box No. 6 (for Circuit Opening Relay) and body ground.
^ If not OK check starter signal circuit.