Toyota Service Blog

Adjust Valve Timing

(a) Check the fuel pressure.

NG CHECK AND REPLACE FUEL PUMP,

- PRESSURE REGULATOR, FUEL PIPE LINE

AND FILTER

READ DATA LIST (COOLANT TEMP)

Connect the intelligent tester to the DLC3. Turn the ignition switch to ON. Turn the tester ON.

Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / COOLANT TEMP.

Read the COOLANT TEMP twice, when the engine is both cold and warmed up.

Standard:

With cold engine: Same as ambient air temperature.

With warm engine: Between 75°C and 95°C (167°F and 203°F).

REPLACE ENGINE COOLANT TEMPERATURE SENSOR

READ DATA LIST (MAF)

Connect the intelligent tester to the DLC3. Turn the ignition switch to ON. Turn the tester ON.

Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / MAF and COOLANT TEMP.

Allow the engine to idle until the COOLANT TEMP reaches 75°C (167°F) or more.

Read the MAF with the engine in an idling condition and at an engine speed of 2,500 rpm. Standard:

MAF while engine idling: Between 2.0 g/sec and 4.5 g/ sec (shift position: N, A/C: OFF). MAF at engine speed of 2,500 rpm: Between 8.0 g/sec and 14.7 g/sec (shift position: N, A/C: OFF).

REPLACE MASS AIR FLOW METER

CHECK FOR INTERMITTENT PROBLEMS

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