P0883

DTC P0882: Malfunction of power supply system (Low)

DTC P0883: Malfunction of power supply system (high)

TCM POWER SUPPLY CIRCUIT





DIAGNOSTIC FUNCTION
TCM monitors if power supply system is normal or not and judges the trouble.

JUDGMENT CRITERIA
^ [P0882]: When the engine speed is 450 r/min or more and secondary pressure is above 0.3 MPa (44 psi), the power supply voltage is 9.0 volts or less (for 5 seconds)
^ [P0883]:: When the engine speed is 450 r/min or more, the secondary pressure is above 0.3 MPa (44 psi) and the vehicle speed is 1 km/h (0.6 mph) or more, the power supply voltage is 16.0 volts or more (for 5 seconds)

PROBABLE CAUSES
^ Damaged wiring harness and connectors
^ Malfunction of TCM

DIAGNOSTIC PROCEDURE

STEP 1. Check the following connector:
^ A-15X CVT control relay connector
^ C-41 TCM connector
Check each terminal for imperfect contact.

Q: Is the check result normal?
YES: Go to Step 2.
NO: Repair the defective connector.

STEP 2. Check for short circuit in the wiring harness between the fusible link No.36 and the TCM connector.
^ Between fusible link No.36 and C-41 TCM connector (terminal No.12)
^ Between fusible link No.36 and C-41 TCM connector (terminal No.25)

Q: Is the check result normal?
YES: Go to Step 3.
NO: Repair the wiring harness.

STEP 3. Check for open circuit in the wiring harness between the TCM connector and the ground.
^ Between C-41 TCM (terminal No.13) and ground
^ Between C-41 TCM (terminal No.26) and ground

Q: Is the check result normal?
YES: Go to Step 4.
NO: Repair the wiring harness.

STEP 4. Retest the system.
Recheck the trouble symptom.

Q: Does the malfunction take place again?
YES: Replace TCM.
NO: Intermittent malfunction