Inspection Procedure

HINT.

When viewed from the rear of the engine assembly, Bank 1 is on the left side and Bank 2 is on the right side.
Read freeze frame data using the intelligent tester or Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0088)

Connect the intelligent tester or Techstream to the DLC3.
Turn the power switch ON (IG) and turn the tester ON
Enter the following menus.
1. Intelligent tester - Select. DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
2. Techstream - Select- Powertrain / Engine and ECT / Trouble Codes

Read the DTCs using the tester.

Result

RESULT REFERENCE

Display (DTC output)	Proceed to
P0088	A
P0088 and other DTCs	B

HINT.

If any codes other than P0088 are output, perform troubleshooting for those DTCs first.

B: GO TO DTC CHART (See DIAGNOSTIC TROUBLE CODE CHART )

A: Go to next step

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (FUEL PRESSURE RELIEF VALVE OPEN)

Put the engine in inspection mode (see INSPECTION MODE PROCEDURE )
Warm up the engine.
Connect the intelligent tester or Techstream to the DLC3.
Turn the tester ON.
Enter the following menus.
1. Intelligent tester-Select DIAGNOSIS/ ENHANCED OBD II / DATA LIST / FUEL PRESS and COOLANT TEMP and BATTERY VOLTAGE
2. Techstream - Select Powertrain / Engine and ECT / Data List / Primary / Fuel Press and Coolant Temp and Battery Voltage
  HINT
  - Coolant Temp value is 50°C (122°F) or more
  - Battery Voltage value is 10 V or higher
  - Fuel Press value is 2000 kPa or higher
Turn the power switch OFF.
HINT.

Before turning the power switch OFF, write down the Fuel Press value.
Wait for 10 seconds
Put the engine in inspection mode.
After starting the engine, turn the power switch OFF within 45 seconds.
Wait for 10 seconds. Then turn the power switch ON (IG)
Enter the following menus.
1. Intelligent tester - Select: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / FP REL VLV OPN / DATA LIST / FUEL PRESS and COOLANT TEMP and BATTERY VOLTAGE.
2. Techstream - Select. Powertrain / Engine and ECT / Active Test / Fuel Pressure Relief Valve Open / Primary / Fuel Press and Coolant Temp and Battery Voltage.
Check if the Fuel Press value is stable.
HINT.

Before performing the Active Test, check that the following conditions are met.
- Coolant Temp value is 50°C (122°F) or more
- Battery Voltage value is 10 V or higher
- Fuel Press value is 2000 kPa or higher
Set Fuel Pressure Relief Valve Open to ON to open the fuel relief valve.
NOTE:
- Wait 30 seconds after turning the power switch ON (IG). If ON is selected before 30 seconds have passed, the Active Test will not operate.
- After selecting ON, the Active Test will turn OFF automatically after 2 seconds have passed.
- After ON is selected, ON will not be operable for 60 seconds.

While performing the Active Test, check the fuel pressure.

Fig 1: Fuel Pressure Chart

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Result

RESULT REFERENCE

Inspection Result	Proceed to
Fuel pressure drops	A
Fuel pressure does not change	B

B: Go to step 5

A: Go to next step

REPLACE FUEL PUMP (for High Pressure of Bank 1 and Bank 2)
1. Replace fuel pump (for High Pressure of Bank 1 and Bank 2) (see REMOVAL ).

CHECK IF DTC OUTPUT REOCCURS (SEE IF DTC P0088 IS OUTPUT AGAIN)

Clear DTCs (see DTC CHECK/CLEAR )
Put the engine in inspection mode (see INSPECTION MODE PROCEDURE )
Connect the intelligent tester or Techstream to the DLC3.
Turn the tester ON.
Enter the following menus:
1. Intelligent tester - Select: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES
2. Techstream - Select. Powertrain / Engine and ECT / Trouble Codes.

Read the DTCs using the tester.

Result

RESULT REFERENCE

Display (DTC output)	Proceed to
P0088	A
No output	B

B: END

A: REPLACE ECM (See REMOVAL )

INSPECT ECM (DSVR VOLTAGE)

Put the engine in inspection mode (see INSPECTION MODE PROCEDURE ).
Warm up the engine.
Connect the intelligent tester or Techstream to the DLC3
Turn the tester ON.
Enter the following menus:
1. Intelligent tester - Select: DIAGNOSIS / ENHANCED OBD II / DATA LIST / FUEL PRESS and COOLANT TEMP and BATTERY VOLTAGE.
2. Techstream - Select. Powertrain / Engine and ECT / Data List / Primary / Fuel Press and Coolant Temp and Battery Voltage
  HINT
  - Coolant Temp value is 50°C (122°F) or more
  - Battery Voltage value is 10 V or higher
  - Fuel Press value is 2000 kPa or higher
Turn the power switch OFF.
HINT.

Before turning the power switch OFF, write down the Fuel Press value
Wait for 10 seconds.
Put the engine in inspection mode (see INSPECTION MODE PROCEDURE ).
After starting the engine, turn the power switch OFF within 45 seconds
Wait for 10 seconds Then turn the power switch ON (IG).
Enter the following menus.
1. Intelligent tester - Select DIAGNOSIS/ ENHANCED OBD II / ACTIVE TEST / FP REL VLV OPN / PRIMARY / FUEL PRESS.
2. Techstream - Select: Powertrain / Engine and ECT / Active Test / Fuel Pressure Relief Valve Open / Primary / Fuel Press and Coolant Temp and Battery Voltage.
Check if the Fuel Press value is stable
HINT

Before performing the Active Test, check that the following conditions are met
- Coolant Temp value is 50°C (122°F) or more
- Battery Voltage value is 10 V or higher
- Fuel Press value is 2000 kPa or higher
Set Fuel Pressure Relief Valve Open to ON to open the fuel relief valve
NOTE:
- Wait 30 seconds after turning the power switch ON (IG). If ON is selected before 30 seconds have passed, the Active Test will not operate.
- After selecting ON, the Active Test will turn OFF automatically after 2 seconds have passed.
- After ON is selected, ON will not be operable for 60 seconds.

After performing the Active Test, check the ECM voltage

Result

RESULT REFERENCE

Result	Proceed to
0 V	A
Remains between 11 to 14 V	B
11 to 14 V → 0 to 3 0V	C

Fig 2: Identifying ECM Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

B: Go to step 8

C: Go to step 9

A: Go to next step

CHECK HARNESS AND CONNECTOR (ENGINE ROOM NO. 2 JUNCTION BLOCK - ECM)

Remove the engine room No. 2 junction block.

Fig 3: Identifying Engine Room No. 2 Junction Block Connector And A13 ECM Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the A13 ECM connector.

Measure the resistance according to the value(s) in the table below

Standard resistance (Check for open)

STANDARD RESISTANCE

Tester Connection	Condition	Specified Condition
2G-2 - A13-28 (DSVR)	Always	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

REPLACE ENGINE ROOM NO. 2 JUNCTION BLOCK
NEXT: Go to step 13
REPLACE ECM
1. Replace the ECM (see REMOVAL )
NEXT: Go to step 13

INSPECT FUSE (RELIEF VLV)

Remove the RELIEF VLV fuse from the engine room No. 2 junction block

Fig 4: Identifying RELIEF VLV Fuse In Engine Room No. 2 Junction Block

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value(s) in the table below.

Standard resistance

STANDARD RESISTANCE

Tester Connection	Condition	Specified Condition
RELIEF VLV fuse	Always	Below 1 Ω

NG: CHECK FOR SHORT IN ALL HARNESSES AND COMPONENTS CONNECTED TO FUSE

OK: Go to next step

INSPECT ENGINE ROOM NO. 2 JUNCTION BLOCK (RELIEF VLV RELAY)

Fig 5: Identifying Engine Room No. 2 Junction Block Terminals (Relief VLV Relay)

HINT:

RELIEF VLV cannot be removed and inspected, as it is part of the engine room No. 2 junction block internal circuit

Put the engine in inspection mode (see INSPECTION MODE PROCEDURE )
Remove the terminal cover.

Measure the voltage according to the value(s) in the table below

Standard voltage

STANDARD VOLTAGE

Tester Connection	Switch Condition	Specified Condition
4 - Body ground	Always	11 to 14 V
5 - Body ground	Always	11 to 14 V
6 - Body ground	Always	11 to 14 V
9 - Body ground	Power switch ON (READY) → OFF	11 to 14 V (After power switch turned OFF, voltage is between 11 to 14 V for 3 seconds)

NG: REPLACE ENGINE ROOM NO. 2 JUNCTION BLOCK

OK: Go to next step

CHECK HARNESS AND CONNECTOR (ENGINE ROOM NO. 2 JUNCTION BLOCK - FUEL RELIEF VALVE, FUEL RELIEF VALVE - BODY GROUND)

Remove the engine room No. 2 junction block.

Fig 6: Identifying Engine Room No. 2 Junction Block Connector And E58 Fuel Relief Valve Connector Terminals

Disconnect the E58 fuel relief valve connector.

Measure the resistance according to the value(s) in the table below.

Standard resistance (Check for open)

STANDARD RESISTANCE

Tester Connection	Condition	Specified Condition
2D-8 - E58-1 (EMV+)	Always	Below 1 Ω
E58-2 (EMV-) - Body ground	Always	Below 1 Ω

Standard resistance (Check for short)

STANDARD RESISTANCE

Tester Connection	Condition	Specified Condition
2D-8 or E58-1 (EMV+) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

REPLACE FUEL RELIEF VALVE
1. Replace the fuel relief valve (see REMOVAL )
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
1. Put the engine in inspection mode (see INSPECTION MODE PROCEDURE ).
2. Warm up the engine
3. Connect the intelligent tester or Techstream to the DLC3.
4. Turn the tester ON
5. Enter the following menus:
  1. Intelligent tester - Select: DIAGNOSIS / ENHANCED OBD II / DATA LIST / FUEL PRESS and COOLANT TEMP and BATTERY VOLTAGE.
  2. Techstream - Select: Powertrain / Engine and ECT / Data List / Primary / Fuel Press and Coolant Temp and Battery Voltage.
    HINT.
    - Coolant Temp value is 50°C (122°F) or more
    - Battery Voltage value is 10 V or higher
    - Fuel Press value is 2000 kPa or higher
6. Turn the power switch OFF.
  HINT:
  
  Before turning the power switch OFF, write down the Fuel Press value.
7. Wait for 10 seconds.
8. Put the engine in inspection mode.
9. After starting the engine, turn the power switch OFF within 45 seconds
10. Wait for 10 seconds. Then turn the power switch ON (IG).
11. Enter the following menus:
  1. Intelligent tester - Select. DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / FP REL VLV OPN / DATA LIST / FUEL PRESS and COOLANT TEMP and BATTERY VOLTAGE.
  2. Techstream - Select: Powertrain / Engine and ECT / Active Test / Fuel Pressure Relief Valve Open / Primary / Fuel Press and Coolant Temp and Battery Voltage.
12. Check if the Fuel Press value is stable.
  HINT.
  
  Before performing the Active Test, check that the following conditions are met.
  - Coolant Temp value is 50°C (122°F) or more
  - Battery Voltage value is 10 V or more
  - Fuel Press value is 2000 kPa or more
13. Set Fuel Pressure Relief Valve Open to ON to open the fuel relief valve.
  NOTE:
  - Wait 30 seconds after turning the power switch ON (IG). If ON is selected before 30 seconds have passed, the Active Test will not operate.
  - After selecting ON, the Active Test will turn OFF automatically after 2 seconds have passed.
  - After ON is selected, ON will not be operable for 60 seconds.
14. While performing the Active Test, check the fuel pressure.
  OK: Fuel pressure decreases
NEXT: END