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DTC No. P0816-00 Downshift Switch Circuit
 
 
 
 
DTC SET CONDITION
Check Condition
  • The power supply mode of the electric motor switch is ON.
Judgment Criterion
  • The ON status of the regeneration level selector (-) signal received from the BCM via CAN communication is detected for 60 seconds or more.
 
 
TROUBLESHOOTING HINTS
  • Damaged wiring harness and connectors
  • Malfunction of the spiral cable
  • Malfunction of the steering wheel (Malfunction of the regeneration level selector)
  • Malfunction of the BCM
  • Malfunction of the PHEV-ECU
 
 
DIAGNOSIS
Required Special Tools:
  • MB992744: Vehicle communication interface-Lite (V.C.I.-Lite)
  • MB992745: V.C.I.-Lite main harness A
  • MB992747: V.C.I.-Lite USB cable short
  • MB992748: V.C.I.-Lite USB cable long
  • MB991223: Wiring harness set
  • MB992006: Extra fine probe
1.M.U.T.-IIISE other system data list
Check the following BCM data list.
  • Item No. 31: Paddle shift switch (-)
Check conditionNormal condition
ON operationON
Other than aboveOFF
Is the check result normal?
 
2.Check of continuity at BCM connector
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Check the continuity between the BCM connector (terminal No. 79) and body ground.
OK: No continuity
Is the check result normal?
 
3.Check of short to ground circuit in signal line between BCM connector and spiral cable
Check the signal line between the BCM connector (terminal No. 79) and spiral cable.
Is the check result normal?
Repair the connector(s) or wiring harness.
 
4.Check of continuity at regeneration level selector connector
(1) Disconnect the connector, and measure at the wiring harness side of the equipment.
(2) Check the continuity between the regeneration level selector connector (terminal No. 32) and body ground.
OK: No continuity
(3) Check the continuity between the regeneration level selector connector (terminal No. 32) and regeneration level selector connector (terminal No. 29).
OK: No continuity
Is the check result normal?
Replace the spiral cable (Refer to SRS Airbag - Spiral Cable Removal and Installation).
Replace the steering wheel (Refer to Steering System - Steering Wheel Removal and Installation).
 
5.Check whether the DTC is set again.
(1) Erase the set DTC.
(2) Change the power supply mode of the electric motor switch to ON (READY indicator: OFF).
(3) Wait for 1 minute or more.
(4) Check whether the DTC is set again.
Is the DTC set?
Replace the PHEV-ECU (Refer to PHEV-ECU REMOVAL AND INSTALLATION).
The trouble can be an intermittent malfunction (Refer to General Information - How to Use Troubleshooting/Inspection Service Points, How to Cope with Intermittent Malfunctions HOW TO COPE WITH INTERMITTENT MALFUNCTIONS).
 
6.Check whether the DTC is set again.
(1) Erase the set DTC.
(2) Change the power supply mode of the electric motor switch to ON (READY indicator: OFF).
(3) Wait for 1 minute or more.
(4) Check whether the DTC is set again.
Is the DTC set?
Replace the BCM (Refer to Body Control System - BCM Removal and Installation).
The trouble can be an intermittent malfunction (Refer to General Information - How to Use Troubleshooting/Inspection Service Points, How to Cope with Intermittent Malfunctions HOW TO COPE WITH INTERMITTENT MALFUNCTIONS).