Inspection Procedure
NOTE:
Read freeze frame data using the hand-held tester or the OBD II scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, as well as other data from the time when a malfunction occurred.
- Check voltage between terminal FPR and E1 of ECM.
CHECK:
Measure the voltage between terminals of E8 and E6 ECM connectors.
OK:
CONTINUITY SPECIFICATIONSTester Connection Condition Specified Condition FPR (E8-33) - E1 (E6-1) STA signal ON 9 to 14 V FPR (E8-33) - E1 (E6-1) STA signal OFF 0 to 3 V - OK: Replace ECM (See INSPECTION ).
- NG: Go to next step.
- Check fuel pump relay.
PREPARATION:
Remove the fuel pump relay from the engine room R/B.
CHECK:
Inspect the fuel pump relay.
OK:
CONTINUITY SPECIFICATIONSTester Connection Specified Condition 1 - 2 Continuity 3 - 4 Continuity 3 - 5 No continuity 3 - 5 Continuity (Apply battery voltage terminal 1 and 2) - NG: Replace fuel pump relay.
- OK: Go to next step.
- Check for open and short in harness and connector between fuel pump relay and ECM.
PREPARATION:
- Remove the fuel pump relay from the engine room J/B.
- Disconnect the E8 ECM connector.
CHECK:
Measure the resistance between wire harness side connectors.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
OK:
CONNECTION RESISTANCE SPECIFICATIONSTester Connection Specified Condition Engine Room J/B (Fuel pump relay terminal 1) - FPR (E8-33) Below 1 Ω Engine Room J/B (Fuel pump relay terminal 1) or FPR (E8-33) -Body ground 10 kΩ or higher
- NG: Repair or replace harness or connector.
- OK: Replace ECM (See INSPECTION ).