126
XR116A
2. On the sensor side of connector, connect the black
(negative) test lead to one white wire pin; then con-
nect the red (positive) test lead to the other white
wire pin.
3. With the meter in the OHMS position, the reading
should be between 6.7-10.1 ohms.
NOTE: If the meter does not read as specified,
replace sensor.
TEMPERATURE/MANIFOLD ABSOLUTE
PRESSURE (TMAP) SENSOR
NOTE: Preliminary checks may be performed on
this component using the diagnostic mode on the LCD
gauge (see EFI Diagnostic System in this section).
1. Disconnect the TMAP connector from the sensor
located on top of the throttle body.
2. Select DC Voltage on the tester and turn the ignition
switch to the ON position.
3. Connect the black tester lead to the pink/black wire
and the red tester lead to the orange/blue wire. The
meter should read 4.5-5.5 DC volts. If the meter does
not read as specified, check the ECM connector or
wiring.
4. Connect the sensor to the harness; then using Maxi-
Clips, connect the red tester lead to the brown/white
wire and the black tester lead to the pink/black wire.
With the engine running at idle speed, the meter
should read approximately 2.5 DC volts.
5. Connect the red tester lead to the green/red wire.
With the engine at idle and at room temperature
(approximately 60° F), the meter should read
approximately 2.9 DC volts.
NOTE: If the meter does not read as specified,
replace the sensor.
ENGINE COOLANT TEMPERATURE
(ECT) SENSOR
NOTE: Preliminary checks may be performed on
this component using the diagnostic mode on the LCD
gauge (see EFI Diagnostic System in this section).
1. Connect the meter leads (selector in OHMS position)
to the sensor terminals.
2. Suspend the sensor and a thermometer in a container
of cooking oil; then heat the oil.
NOTE: Neither the sensor nor the thermometer
should be allowed to touch the bottom of the con-
tainer or inaccurate readings will occur. Use wire
holders to suspend the sensor and thermometer.
3. If the readings are not as indicated, the sensor must
be replaced.
4. Install the sensor and tighten securely.
5. Connect the leads.
SPEED SENSOR
NOTE: Prior to testing the speed sensor, inspect the
three-wire connector on the speed sensor for contami-
nation, broken pins, and/or corrosion.
1. Set the meter selector to the DC Voltage position.
2. With appropriate needle adapters on the meter leads,
connect the red tester lead to the orange lead; then
connect the black tester lead to the black lead.
XR119A
3. Turn the ignition switch to the ON position.
4. The meter must show battery voltage.
Component data can be retrieved using the CATT II. Uti-
lize the Sensor Data screen.
Component data can be retrieved using the CATT II. Uti-
lize the Sensor Data screen.
! WARNING
Wear insulated gloves and safety glasses. Heated oil
can cause severe burns.
TEMPERATURE
RESISTANCE
20° C (68° F)
2.45k Ohms
50° C (122° F)
800 Ohms
80° C (176° F)
318 Ohms
110° C (230° F)
142 Ohms
Summary of Contents for 2016 Alterra 500
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