P1212

Description
This circuit line is used to control the smooth engine operation of ABS/TCS during the TCS operation. Pulse signals are exchanged between ECM and ABS/TCS control unit.

Be sure to erase the malfunction information such as DTC not only in ABS/TCS control unit but also ECM after the ABS/TCS related repair.

DTC ERASING PROCEDURE FOR ABS/TCS RELATED REPAIR
1. Turn ignition switch "OFF" and then turn it "ON".
2. Connect CONSULT-II and select "ABS".
3. Select "ABS" and touch "SELF-DIAG RESULTS".
4. Touch "ERASE".
5. Touch "BACK" then erase malfunction code which has been stored in the TCM or ECM.

On Board Diagnosis Logic
Freeze frame data is not stored in the ECM for the ABS/TCS communication line. The MIL will not light up for the ABS/TCS communication line.

Malfunction is detected when ECM receives incorrect voltage from ABS/TCS control unit continuously.

Possible Cause
- Harness or connectors
(The communication line circuit between ECM and ABS/TCS control unit is open or shorted. )
- ABS/TCS control unit
- Dead (Weak) battery

DTC Confirmation Procedure

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10.5 V at idle.

WITH CONSULT-II
1. Turn ignition switch "ON".
2. Select "DATA MONITOR" mode with CONSULT-II.
3. Start engine and let it idle for at least 3 seconds.
4. If a 1st trip DTC is detected, go to "Diagnostic Procedure" below.