DTC B1512-87: Lost Communication with Steering Switch Control Module Missing Message [02/2024 - ]: Procedure

Pre-procedure1

1. Disconnect the E64 spiral cable with sensor sub-assembly connector.

   Procedure1

2. Using an oscilloscope, check the waveform.
   NOTE:

   The wave pattern changes according to CXPI communication signal.

   OK

   Tester Connection	Switch Condition	Specified Condition
   E64-1 (LIN) - Body ground	Ignition switch ON	Pulse generation

   Result

   Proceed to
   OK
   NG

   Post-procedure1

3. None

Result: 

NG 

See step  4

Result: 

OK 

See step  2

Pre-procedure1

1. Disconnect the E64 spiral cable with sensor sub-assembly connector.

   Procedure1

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

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   E64-4 (BHT) - Body ground	Ignition switch off	11 to 14 V

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E64-2 (EHT) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

   Post-procedure1

4. None

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

Refer to INSPECTION [02/2024 - ]

Result

Result: 

OK 

REPLACE MULTIPLEX NETWORK STEERING ECU 

Refer to REMOVAL [02/2024 - ]

Result: 

NG 

REPLACE SPIRAL CABLE SUB-ASSEMBLY 

Refer to REMOVAL [02/2024 - ]

Pre-procedure1

1. Disconnect the E4*1 or E7*2 combination meter assembly connector.
   1. *1: for 12.3 Inch Multi-information Display Type
   2. *2: for 7 Inch Multi-information Display Type
2. Disconnect the E64 spiral cable with sensor sub-assembly connector.

   Procedure1

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E4-32 (CXPI) - E64-1 (LIN)*1	Always	Below 1 Ω
   E4-32 (CXPI) or E64-1 (LIN) - Body ground*1
   E7-25 (CXPI) - E64-1 (LIN)*2	Always	10 kΩ or higher
   E7-25 (CXPI) or E64-1 (LIN) - Body ground*2

   Result

   Proceed to
   OK
   NG

   Post-procedure1

4. None

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY 

Refer to REMOVAL [02/2024 - ]

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR