Page 79 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

• Under powered engine

• Erratic gear changes on automatic transmission
• It may be related to VVT mechanism
3 Connect the OBD II scan tool to the engine data link connector
4 Read the diagnostic trouble code and repair the defective component

Some VVT generic OBD II codes are given in tabulation

S. No. VVT generic OBD II code Possible causes and areas to be checked

1 P00l0 ‘A’ cam shaft position actuator circuit bank -I Cam shaft sensor 2

P0011 ‘A’ cam shaft position timing over advanced Valve timing
2
bank-I Oil control valve
P0012 ‘A’ cam shaft position timing over retarded Oil control valve
3
bank-I Filter screen

P0013 ‘B’ cam shaft actuator circuit bank -I Filter screen
4 Wrong viscosity oil
Cam shaft timing gears

P0014 ‘B’ cam shaft position timing over advanced Dirty or low engine oil VVT controller
5
bank -I assembly
P00lS ‘B’ cam shaft position timing over retarded Defective PCM or electrical wiring
6
bank -I

7 P0020 ‘A’ cam shaft Defective PCM or electrical wiring

P0021 ‘A’ cam shaft position timing over advanced or Defective PCM or electrical wiring
8
system fault bank II
P0022 ‘A’ cam shaft position timing over retarded Defective PCM or electrical wiring
9
bank -II

10 P0023 ‘B’ cam shaft position actuator circuit bank -II Defective PCM or electrical wiring

P0024 ‘B’ cam shaft position timing over advanced or Defective PCM or electrical wiring
11
system fault bank II

P0025 ‘B’ cam shaft position timing over retarded Defective PCM or electrical wiring
12
bank -II

TASK 4: Checking of VVT electrical circuit
1 Take out given engine/vehicle VVT electrical circuit diagram.
2 Check the continuity of electrical circuit.
3 Check the supply voltage of the circuit as specified the manufacturer service manual.

4 If the electrical circuit is foung ok, replace new PCM.

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CITS : Automotive - Mechanic Diesel - Exercise 2.26