DTC B2788: IG2 Signal Malfunction: Procedure

1. Remove the IG2 relay from the engine room R/B.
   Fig 1: Inspecting Ignition Relay No. 2

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Resistance

   Tester connection	Specified condition
   3 - 5	10 kΩ or higher
   3 - 5	Below 1 Ω (when battery voltage is applied to terminals 1 and 2)

NG → REPLACE IGNITION RELAY NO. 2 

OK: Go to next step 

1. Disconnect the D14 connector from the steering lock actuator assembly.
   Fig 2: Identifying Steering Lock Actuator Assembly Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Resistance

   Tester connection (Symbols)	Condition	Specified condition
   D14-1 (GND) - Body ground	Always	Below 1 Ω
   D14-2 (SGND) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Measure the voltage according to the value(s) in the table below.
   Fig 3: Identifying Steering Lock Actuator Assembly Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Voltage

   Tester connection (Symbols)	Condition	Specified condition
   D14-6 (IG2) - D14-1 (GND)	Engine switch on (IG)	10 to 14 V
   D14-6 (IG2) - D14-2 (SGND)	Engine switch on (IG)	10 to 14 V

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

   Resistance

   Tester connection (Symbols)	Condition	Specified condition
   *D14-6 (IG2) - D14-7 (B)	Engine switch off	10 kΩ or higher

   *: This measurement is performed with the engine switch off to check for a battery voltage short in the IG2 circuit.

OK → REPLACE STEERING LOCK ACTUATOR ASSEMBLY 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - BATTERY)