Code
No.22: Input shaft speed sensor system
OPERATION
The input shaft speed sensor detects the speed of
the underdrive clutch retainer, and
sends the information to the engine-A/T-ECU as a pulse
signal.
DIAGNOSIS CODE SET CONDITIONS
The diagnosis code No.22 will
be set if the input shaft speed sensor does not send a pulse
signal for one second or more while the 3rd gears are engaged and the
vehicle speed is 40 km/h
or more (the output shaft speed sensor speed is 1000 r/min or
more).
If the code No.22 is set four times, the transmission will be
fixed in 3rd gear as a fail-safe
measure. However, the transmission can be downshifted to 2nd gear by
operating the selector
lever.
PROBABLE CAUSES
- Malfunction of input shaft speed sensor
- Malfunction of underdrive clutch retainer
- Damaged harness wires and connectors
- Malfunction of the engine-A/T-ECU
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STEP 1. M.U.T.-III data list
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Item 0001: Input shaft speed sensor
(Refer to data list reference table ).
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Q.
Is the check result normal?
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Intermittent
malfunction (Refer to GROUP 00 - How to Cope with
Intermittent
Malfunction ).
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Go to Step
2.
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STEP 2. Connector check: B-112 input shaft speed sensor
connector
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![](../../../img/23/AC302452AG00ENG.png)
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Check for the contact with
terminals.
Q.
Is the check result normal?
Go to Step
3.
Repair
the defective connector.
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STEP 3. Measure the resistance at input shaft speed
sensor connector
B-112.
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![](../../../img/23/AC302452AG00ENG.png)
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Disconnect the connector, and
measure the resistance between terminal 1 and earth at the
wiring harness side. OK: 2 Ω or
less
Q.
Is the check result normal?
Go to Step
9.
Go to Step
4.
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STEP 4. Measure the voltage at engine-A/T-ECU
connector C-112.
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(1)Connect input shaft speed sensor connector
B-112.
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(2)Turn the ignition switch to the ON
position.
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![](../../../img/23/AC311284AG00ENG.png)
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(3)Measure the voltage between
engine-A/T-ECU connector C-112 terminal No.88 and
earth. OK: 0.5 V or less
Q.
Is the check result normal?
Go to Step
7.
Go to Step
5.
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STEP 5. Connector check: C-112 engine-A/T-ECU
connector
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![](../../../img/23/AC311284AG00ENG.png)
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Check for the contact with
terminals.
Q.
Is the check result normal?
Go to Step
6.
Repair
the defective connector.
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STEP 6. M.U.T.-III data list
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Item 0001: Input shaft speed sensor
(Refer to data list reference table ).
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Q.
Is the check result normal?
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Intermittent
malfunction (Refer to GROUP 00 - How to Cope with
Intermittent
Malfunction ).
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Replace the
engine-A/T-ECU.
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STEP 7. Connector check: C-112 engine-A/T-ECU
connector,
C-116 J/C (4)
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![](../../../img/23/AC311284AG00ENG.png)
![](../../../img/23/AC310615AP00ENG.png)
![](../../../img/23/AC310628AS00ENG.png)
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Check for the contact with
terminals.
Q.
Is the check result normal?
Go to Step
8.
Repair
the defective connector.
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STEP 8. Check the harness between input shaft speed
sensor connector
B-112 terminal No.1 and engine-A/T-ECU connector
C-112 terminal No.88.
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![](../../../img/23/AC302452AG00ENG.png)
![](../../../img/23/AC311284AG00ENG.png)
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Check the earth line for open
circuit.
Q.
Is the check result normal?
Go to Step
6.
Repair
the wiring harness.
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STEP 9. Measure the voltage at input shaft speed sensor
connector
B-112.
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![](../../../img/23/AC302452AG00ENG.png)
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(1)Disconnect the connector, and
measure the voltage between terminal 3 and earth at the
wiring harness side. (2)Turn the ignition switch to the
ON position. OK: System voltage
Q.
Is the check result normal?
Go to Step
12.
Go to Step
10.
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STEP 10. Connectors check: C-203 J/B connector,
C-18 intermediate
connector, C-116 J/C (4), C-51 J/C (13)
<Vehicles for Hong Kong and
Singapore>
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![](../../../img/23/AC310623AL00ENG.png)
![](../../../img/23/AC310618AK00ENG.png)
![](../../../img/23/AC310615AQ00ENG.png)
![](../../../img/23/AC310628AT00ENG.png)
![](../../../img/23/AC310615AP00ENG.png)
![](../../../img/23/AC310628AS00ENG.png)
![](../../../img/23/AC503532AB00ENG.png)
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Check for the contact with
terminals.
Q.
Is the check result normal?
Go to Step
11.
Repair
the defective connector.
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STEP 11. Check the harness between input shaft speed
sensor connector
B-112 terminal No.3 and junction block connector C-203
terminal No.12.
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![](../../../img/23/AC302452AG00ENG.png)
![](../../../img/23/AC310623AL00ENG.png)
![](../../../img/23/AC310618AK00ENG.png)
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Check the power supply line for
short or open circuit.
Q.
Is the check result normal?
Go to Step
6.
Repair
the wiring harness.
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STEP 12. Measure the voltage at input shaft speed sensor
connector
B-112.
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![](../../../img/23/AC302452AG00ENG.png)
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(1)Disconnect the connector, and
measure the voltage between terminal 2 and earth at the
wiring harness side. (2)Turn the ignition switch to the
ON position. OK: 4.9 - 5.1
V
Q.
Is the check result normal?
Go to Step
18.
Go to Step
13.
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STEP 13. Measure the voltage at engine-A/T-ECU
connector
C-112.
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(1)Disconnect input shaft speed sensor connector
B-112.
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(2)Turn the ignition switch to the ON
position.
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![](../../../img/23/AC311284AG00ENG.png)
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(3)Measure the voltage between
engine-A/T-ECU connector C-112 terminal No.64 and
earth. OK: 4.9 - 5.1 V
Q.
Is the check result normal?
Go to Step
16.
Go to Step
14.
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STEP 14. Connector check: C-112 engine-A/T-ECU
connector
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![](../../../img/23/AC311284AG00ENG.png)
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Check for the contact with
terminals.
Q.
Is the check result normal?
Go to Step
15.
Repair
the defective connector.
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STEP 15. Check the harness between input shaft speed
sensor connector
B-112 terminal No.2 and engine-A/T-ECU connector
C-112 terminal No.64.
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![](../../../img/23/AC302452AG00ENG.png)
![](../../../img/23/AC311284AG00ENG.png)
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Check the output line for short
circuit.
Q.
Is the check result normal?
Go to Step
6.
Repair
the wiring harness.
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STEP 16. Connector check: C-112 engine-A/T-ECU
connector
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![](../../../img/23/AC311284AG00ENG.png)
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Check for the contact with
terminals.
Q.
Is the check result normal?
Go to Step
17.
Repair
the defective connector.
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STEP 17. Check the harness between input shaft speed
sensor connector
B-112 terminal No.2 and engine-A/T-ECU connector
C-112 terminal No.64.
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![](../../../img/23/AC302452AG00ENG.png)
![](../../../img/23/AC311284AG00ENG.png)
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Check the output line for open
circuit.
Q.
Is the check result normal?
Go to Step
6.
Repair
the wiring harness.
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STEP 18. Measure the output wave pattern of the input
shaft speed
sensor at engine-A/T-ECU connector C-112 (using an
oscilloscope).
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(1)Shift the selector lever to the D range.
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(2)Accelerate the vehicle to approximately 50
km/h (shift range; 3rd).
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![](../../../img/23/AC311284AG00ENG.png)
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(3)Connect an oscilloscope, and
measure the voltage between engine-A/T-ECU connector
C-112 terminal No.64 and earth. OK: A wave
pattern such as the one shown on (Check
Procedure Using an Oscilloscope) should be output, and
the maximum value should be 4.8 V or
more and the minimum value should be 0.8 V or less.
There should be no noise in the output wave
pattern.
Q.
Is the check result normal?
Go to Step
6.
Go to Step
19.
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STEP 19. Connector check: C-112 engine-A/T-ECU
connector
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![](../../../img/23/AC311284AG00ENG.png)
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Check for the contact with
terminals.
Q.
Is the check result normal?
Go to Step
20.
Repair
the defective connector.
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STEP 20. Replace the input shaft speed sensor and then
recheck the
diagnosis code.
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(1)Replace the input shaft speed sensor.
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(2)Test drive the vehicle.
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(3)Check if the diagnosis code is set.
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Q.
Is diagnosis code 22 set?
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Go to Step
21.
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The inspection is
complete.
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STEP 21. Underdrive clutch retainer
inspection
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Visually check the underdrive
clutch retainer for damage.
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Q.
Is the check result normal?
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Eliminate the cause
of the noise.
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Replace the
underdrive clutch retainer.
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