Inspection Procedure

HINT:

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 E5 and E7 ECM connectors.

OK:

Tester Connection Specified Condition Table

Tester Connection	Condition	Specified Condition
FPR (E5-33) - E1 (E7-1)	STA signal ON	9 to 14 V
FPR (E5-33) - E1 (E7-1)	STA signal OFF	0 to 3 V

Fig 1: Locating FPR and E1 terminal of ECM

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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:

Tester Connection Specified Condition Table

Tester Connection	Specified Condition
1-2	Continuity
3-4	Continuity
3-5	No continuity
3-5	Continuity (Apply battery voltage terminal 1 and 2)

Fig 2: Inspecting Fuel Pump Relay

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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 E5 ECM connector.

CHECK:

Measure the resistance between wire harness side connectors.

OK:

Tester Connection Specified Condition Table

Tester Connection	Specified Condition
Engine Room J/B (Fuel pump relay terminal 1) - FPR (E5-33)	Below 1 Ω
Engine Room J/B (Fuel pump relay terminal 1) or FPR (E5-33) - Body ground	10 kΩ or higher

Fig 3: Locating Fuel Pump Relay terminal

Fig 4: Disconnecting E5 ECM Connector

NG: Repair or replace harness or connector.
OK: Replace ECM (See INSPECTION ).