Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.

DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
1. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the main wire and the branch wire.
  CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

CHECK FOR OPEN IN CAN BUS WIRE (SUSPENSION CONTROL ECU BRANCH WIRE)

W/AVS

Disconnect the 018 suspension control ECU connector.

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

Tester Connection	Switch Condition	Specified Condition
O18-30 (CANH) - O18-29 (CANL)	Ignition switch off	54 to 69 Ω

Fig 1: Identifying 018 Suspension Control ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

W/O AVS

Disconnect the 019 suspension control ECU connector.

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

Tester Connection	Switch Condition	Specified Condition
O19-29 (CANH) - O19-28 (CANL)	Ignition switch off	54 to 69 Ω

NG: REPAIR OR REPLACE SUSPENSION CONTROL ECU BRANCH WIRE OR CONNECTOR (CANH, CANL)

Fig 2: Identifying 019 Suspension Control ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (SUSPENSION CONTROL ECU - BATTERY AND BODY GROUND)

W/AVS

Reconnect the cable to the negative (-) battery terminal.
Disconnect the 017 and 018 suspension control ECU connector.

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

Tester Connection	Condition	Specified Condition
O17-5 (GND) - Body ground	Always	Below 1 Ω
O18-1 (GND) - Body ground	Always	Below 1 Ω

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

Standard Voltage

TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

Tester Connection	Switch Condition	Specified Condition
O17-6 (B) - Body ground	Always	11 to 14 V
O18-10 (IG) - Body ground	Ignition switch ON	11 to 14 V

Fig 3: Identifying 017 And O18 Suspension Control ECU Connector Terminals

W/O AVS

Reconnect the cable to the negative (-) battery terminal before measuring the resistances of the main wire and the branch wire.
Disconnect the 019 suspension control ECU connector.

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

Tester Connection	Condition	Specified Condition
O19-22 (GND) - Body ground	Always	Below 1 Ω

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

Fig 4: Identifying 019 Suspension Control ECU Connector Terminals

Standard Voltage

TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

Tester Connection	Switch Condition	Specified Condition
O19-24 (B) - Body ground	Always	11 to 14 V
O19-10 (IG) - Body ground	Ignition switch ON	11 to 14 V

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE SUSPENSION CONTROL ECU (See REMOVAL )