Dtc C1612 Ig Voltage Is Low Or High

Audio Visual Telematics. Land Cruiser. Urj200, 202 Grj200 Vdj200
Park Assist Monitoring. Land Cruiser. Urj200, 202 Grj200 Vdj200

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. Urj200, 202 Grj200 Vdj200.Park Assist Monitoring.Toyota Parking Assist-Sensor System. Dtc C1612 Ig Voltage Is Low Or High


INSPECTION PROCEDURE

NOTICE:
  1. When "System initializing" is displayed on the parking assist ECU after the battery terminal disconnected, correct the steering angle neutral point (Click here).
  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 (w/ Side Monitor System) may be needed (Click here).
  3. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
1.CHECK FOR DTC

  1. Clear the DTCs (Click here).

  1. Check for DTCs (Click here).

    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 (Click here)

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


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Park Assist Monitoring.Toyota Parking Assist-Sensor System. 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
    F75-4 (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
    F75-8 (IG) - F75-4 (GND1)
    		Engine switch on (IG)
    		11 to 14 V
Text in Illustration
*a
Front view of wire harness connector
(to Parking Assist ECU)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE PARKING ASSIST ECU (Click here)