Dtc C1612 Ig Voltage Is Low Or High


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FOR DTC

CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - BATTERY AND BODY GROUND)

DTC C1612 IG Voltage is Low or High


DESCRIPTION

This DTC is stored if the parking assist ECU judges as a result of its self check that the voltage received by terminal IG is low or high.

DTC Code
DTC Detection Condition
Trouble Area
C1612
  1. IG voltage is low
  2. IG voltage is high
  1. Harness or connector
  2. Parking assist ECU

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Park Assist Monitoring.Toyota Parking Assist-Sensor System (W/ Multi-Display). Dtc C1612 Ig Voltage Is Low Or High


INSPECTION PROCEDURE

NOTICE:
  1. When "System initializing" is displayed on the parking assist ECU after the cable is disconnected from the negative (-) battery terminal, correct the steering angle neutral point (LandCruiser RM0000035DE05TX.html).
  2. Depending on the parts that are replaced or operations that are performed during vehicle inspection or maintenance, calibration of other systems as well as the parking assist monitor system may be needed (LandCruiser RM0000035DD06LX.html).
  3. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
1.CHECK FOR DTC

  1. Clear the DTCs (LandCruiser RM0000035DB07DX.html).

  1. Check for DTCs (LandCruiser RM0000035DB07DX.html).

    OK:
    DTC C1612 is not output.
    HINT:
    If the parking assist ECU cannot read the stored information when it is activated, allowing the ECU to store the information again may return the system to normal.


NG
Go to step 2
OK

USE SIMULATION METHOD TO CHECK (LandCruiser RM000003YMJ00XX.html)

2.CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - BATTERY AND BODY GROUND)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Park Assist Monitoring.Toyota Parking Assist-Sensor System (W/ Multi-Display). Dtc C1612 Ig Voltage Is Low Or High

  1. Disconnect the parking assist ECU connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    I6-4 (GND1) - Body ground
    		Always
    		Below 1 Ω

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    I6-8 (IG) - I6-4 (GND1)
    		Engine switch on (IG)
    		10 to 16 V
Text in Illustration
*a
Front view of wire harness connector
(to Parking Assist ECU)
Result
Proceed to
Result
OK (for LHD)
A
OK (for RHD)
B
NG
C


B
REPLACE PARKING ASSIST ECU (LandCruiser RM00000470500OX.html)

C
REPAIR OR REPLACE HARNESS OR CONNECTOR
A

REPLACE PARKING ASSIST ECU (LandCruiser RM00000466X026X.html)