Toyota Avalon Service & Repair Manual: On-vehicle Inspection

ON-VEHICLE INSPECTION

PROCEDURE

1. INSPECT COMBINATION METER ASSEMBLY

(a) Inspect speedometer operation

NOTICE:

  • The combination meter assembly receives the vehicle speed signal from the skid control ECU (brake actuator assembly) via CAN communication. Therefore, perform the following inspection referring to values on the Data List of the skid control ECU (brake actuator assembly) because it is the source of the vehicle speed signal.
  • Data List values of the skid control ECU (brake actuator assembly) are used for this inspection. Therefore, make sure to perform this inspection after confirming that DTCs are not output.
  • If the tire size or tire inflation pressure is not within the specified range, or the tires are excessively worn, the speedometer indication error will increase. Therefore, make sure to perform this inspection after checking that the tire size, tire inflation pressure and tire wear are in the specified range.

(1) Warm up the engine.

(2) Connect the Techstream to the DLC3.

(3) Turn the engine switch on (IG).

(4) Turn the Techstream on.

(5) Enter the following menus: Chassis / ABS/VSC/TRAC/EPB / Data List.

(6) Read the Data List according to the display on the Techstream.

Chassis > ABS/VSC/TRAC/EPB

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Vehicle Speed

Maximum wheel speed sensor

Min.: 0 km/h (0 mph), Max.: 326.4 km/h (203 mph)

Vehicle stopped: 0 km/h (0 mph)

When driving at constant speed: No large fluctuations

Chassis > ABS/VSC/TRAC/EPB > Data List

Tester Display

Vehicle Speed

Reference mph (for Speedometer with Imperial Units for Main Scale)

Techstream Indication (mph)

Acceptable Range (mph)

20

19.2 to 21.7

40

39.4 to 42.2

60

59.8 to 62.6

80

80.0 to 83.2

100

100.5 to 103.7

120

120.9 to 124.1

140

141.3 to 144.5

Reference km/h (for Speedometer with Metric Units for Main Scale)

Techstream Indication (km/h)

Acceptable Range (km/h)

20

18.5 to 22.5

40

38.7 to 43.2

60

59.2 to 63.7

80

79.3 to 84.3

100

99.8 to 104.8

120

120.3 to 125.3

140

140.7 to 145.7

160

161.2 to 166.2

180

181.6 to 186.6

200

202.1 to 207.1

220

222.5 to 227.5

240

243.0 to 248.0

OK:

Speedometer reading is within the acceptable range at each vehicle speed.

(b) Inspect tachometer operation

(1) Warm up the engine.

(2) Connect the Techstream to the DLC3.

(3) Turn the engine switch on (IG).

(4) Enter the following menus: Powertrain / Engine / Data List.

(5) Read the Data List according to the display on the Techstream.

Powertrain > Engine > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Engine Speed

Engine speed

Min.: 0 rpm, Max.: 16383 rpm

650 to 750 rpm: Idling (shift lever in N, engine warmed up and A/C off)

When the crankshaft position sensor is malfunctioning, "Engine Speed" is approximately 0 rpm or varies greatly from the actual engine speed.

Powertrain > Engine > Data List

Tester Display

Engine Speed

Reference

Techstream Indication (rpm)

Acceptable Range (rpm)

Data in ( ) is for Reference

700

630 to 770

1000

(900 to 1100)

2000

(1850 to 2150)

3000

2800 to 3200

4000

(3800 to 4200)

5000

4800 to 5200

6000

(5750 to 6250)

7000

6700 to 7300

OK:

Tachometer reading is within the acceptable range at each engine speed.

(c) Check LED illumination (LED check)

(1) Check the illumination function of the warning or indicator lights listed below when turning the engine switch on (IG).

OK:

Warning or Indicator Light

Specified Condition

Brake warning light / red (malfunction)

Warning or indicator light comes on for about 3 seconds after turning the engine switch on (IG).

Slip indicator light

VSC OFF indicator light

ABS warning light

Tire pressure warning light

Master warning light

ICS OFF indicator light*

Brake warning light / yellow (minor malfunction)

Brake hold standby indicator light

Brake hold operated indicator light

PCS warning light

SRS warning light

Warning light comes on for about 6 seconds after turning the engine switch on (IG).

EPS warning light

When the engine switch is turned on (IG), warning light (red) illuminates for 2 seconds and then the warning light (yellow) illuminates.

MIL (Check engine warning light)

Warning light comes on when the engine switch on (IG).

  • *: w/ Intelligent Clearance Sonar System
    Odo/Trip Switch Malfunction

    Operating Light Control Rheostat does not Change Light Brightness

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