DTC 0201 Ignition Signal

Ignition Signal (DTC: 0201)







COMPONENT DESCRIPTION
Ignition coil & power transistor
The ignition signal from the ECM is sent to and amplified by the power transistor. The power transistor turns on and off the ignition coil primary circuit. This on-off operation induces the proper high voltage in the coil secondary circuit.




DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE

NOTE: If both DTC P1320 (0201) and DTC P0335 (0802), P0340 (0101) or P1336 (0905) are displayed, perform TROUBLE DIAGNOSIS FOR DTC P0335, P0340 or P1336 first.

With Consult
1) Turn ignition switch "ON".
2) Select "DATA MONITOR" mode with CONSULT.
3) Start engine and wait at least 3 seconds. (If engine does not run, turn ignition switch to "START" for at least 5 seconds.)

OR

With GST
1) Turn ignition switch "ON".
2) Start engine and wait at least 3 seconds. (If engine does not run, turn ignition switch to "START" for at least 5 seconds.)
3) Select MODE 3 with GST.

OR

Without Scan Tools
1) Turn ignition switch "ON".
2) Start engine and wait at least 3 seconds. (If engine does not run, turn ignition switch to "START" for at least 5 seconds.)
3) Turn ignition switch "OFF", wait at least 5 seconds and then turn "ON".
4) Perform diagnostic test mode II (Self-diagnostic results) with ECM.










WIRING DIAGRAM













DIAGNOSTIC PROCEDURE

COMPONENT INSPECTION
Ignition coil
1. Disconnect ignition coil harness connector.







2. Check resistance as shown in the figure.
If NG, replace ignition coil.

Power transistor
1. Disconnect power transistor harness connector.







2. Check power transistor continuity between terminals as shown in the figure.
If NG, replace power transistor.