Code No. P0842:
Malfunction of the Secondary Pressure Sensor (low voltage)
DIAGNOSTIC FUNCTION
The CVT-ECU determines that the system is defective when the secondary pressure sensor output
voltage is lower than a predetermined value.
JUDGEMENT CRITERIA
- The secondary pressure sensor detects a voltage of 0.09 V or less for 5 seconds
with the CVT oil temperature more than -20°C.
PROBABLE CAUSES
- Malfunction of the CVT assembly (Faulty secondary pressure sensor or valve
body assembly)
- Damaged wiring harness and connectors
- Malfunction of CVT-ECU
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STEP 1. Check the following connector
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- CVT assembly connector
- CVT-ECU connector
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Check the terminals for a contact status problem and internal short circuit.
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Q.
Is the check result normal?
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 Go to Step 2.
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 Repair the defective connector.
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STEP 2. Check for open circuit or short to earth in SSPW, LPRS line
between the CVT assembly connector and the CVT-ECU connector
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Q.
Is the check result normal?
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Go to Step 3.
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Repair the wiring harness.
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STEP 3. Voltage measurement at CVT-ECU connector (LPRS terminal)
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(1)Connect the CVT assembly connector and CVT-ECU connector.
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(2)Drive the vehicle until the engine is warmed up.
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(3)Measure the CVT-ECU connector side by backprobing.
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(4)Selector lever position: P range.
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(6)Measure the voltage between the CVT-ECU connector (LPRS terminal) and (SGND terminal).
OK: approx. 0.84 V
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Q.
Is the check result normal?
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Go to Step 4.
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Replace the CVT assembly.
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STEP 4. Symptom recheck after erasing diagnosis code
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Q.
Is the diagnosis code stored?
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Replace the CVT-ECU.
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Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent
Malfunctions  .).
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