Isuzu KB P190. Service manual — part 1115
7A3-6 ON-VEHICLE SERVICE (JR405E)
INHIBITOR SWITCH
The inhibitor switch is attached to the right side of the
transmission.
Inspect
1. Block the wheels.
2. Disconnect the negative battery cable.
3. Disconnect the harness connectors.
4. Use an ohmmeter to check the inhibitor switch
continuity between the following terminals as shown
in the figure.
5. Place the select lever in the “N” position.
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6. Move the select lever to either side.
Check the inhibitor switch continuity between the
terminals shown in Step 4.
The continuity readings should remain fairly steady
as the select lever is moved.
If there is no continuity or the continuity is
intermittent, the inhibitor switch must be adjusted.
Adjust
1. Disconnect the shift cable from the lever.
2. Loosen the inhibitor switch bolts.
3. Use the inhibitor switch set plate to align the neutral
holes (manual shaft and inhibitor switch).
Turn the inhibitor switch to adjust it.
Inibitor switch set plate: 5-8840-2763-0
Note:
Inhibitor switch adjustment is very important.
If the inibitor switch is not correctly adjusted, the
automatic transmission will not function normally.
4. Tighten the 2 inhibitor switch bolts to the specified
touque.
Torque: 6 N·m (0.6 kgf·m/52 lb·in)
47INH-SW01
5. Remove the inhibitor switch set plate.
6. Connect the shift cable to the lever.
7. Connect the harness connector.
Remove or Disconnect
1. Remove the cable bracket (1) from the transmission.
2. Disconnect the shift cable (2) from the lever (3).
3. Disconnect the harness connectors.
4. Remove the inhibitor switch bolts.
5.
Remove the inhibitor switch (4) from the
transmission.
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ON-VEHICLE SERVICE (JR405E) 7A3-7
Install or Connect
1. Install the inhibitor switch to the transmission.
Temporarily tighten the inhibitor switch bolts.
2. Move the manual shaft select lever to the “N”
position.
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3. Use the inhibitor switch set plate to align the neutral
holes (manual shaft and inhibitor switch).
Turn the inhibitor switch to adjust it.
Inhibitor switch set plate: 5-8840-2763-0
Note:
Inhibitor switch adjustment is very important.
If the inhibitor switch is not correctly adjusted, the
automatic transmission will not function normally.
4. Tighten the 2 inhibitor switch bolts to the specified
torque.
Torque: 6 N·m (0.6 kgf·m/52 lb·in)
47INH-SW01
5. Remove the inhibitor switch set plate.
6. Install the cable bracket to the transmission.
7. Connect the shift cable to the lever.
8. Connect the harness connector.
9. Connect the negative battery cable.
10. Remove the wheel blocks.
7A3-8 ON-VEHICLE SERVICE (JR405E)
SPEED SENSOR
The speed sensor is attached to the right side of the
transmission.
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Legend
1. Inhibitor switch
2. Speed sensor
3. Turbine sensor
Inspect
1. During driving at a speed of 20km/h (12mph) with “L”
range in low gear, measure the voltage between the
TCM connector terminals (B13) and (B5) with a
digital voltmeter.
Standard voltage : approx. 7V (AC range)
RTW47ASH000801
2. If the voltage is outside of the standard value, check
the speed sensor pole piece for the presence of
foreign materials and the speeed sensor cable for a
short or open circuit.
If the result of the inspection is normal, replace the
speed sensor.
Torque: 6 N·m (0.6 kgf·m/52 lb·in)
ON-VEHICLE SERVICE (JR405E) 7A3-9
TURBINE SENSOR
The turbine sensor is attached to the right side of the
transmission.
Inspect
1. During driving at a speed of 20km/h (12mph) with “L”
range in low gear, measure the voltage between the
TCM connector terminals (B3) and (B5) with a digital
voltmeter.
Standard voltage : approx. 7V (AC range)
2. If the voltage is outside of the standard value, check
the turbine sensor pole piece for presence of foreign
materials and the turbine sensor cable for a short or
open circuit.
If the result of the inspection is abnormal, replace the
turbine sensor.
Torque: 6 N·m (0.6 kgf·m/52 lb·in)
POWER AND 3RD START SWITCH
Inspect
1. Block the wheels.
2. Disconnect the negative battery cable.
3. Pry out the switch from the floor console.
4. Disconnect the harness connector.
5. Check continuity between terminals (5) and (6) at
third (3rd) position.
6. Check continuity between terminals (3) and (6) at
power (PWR) position.
7. Replace the power and 3rd start switch if the result of
inspection is abnormal.
8. Connect the harness connector.
9. Connect the negative battery cable.
10. Remove the wheel blocks.
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