DTC B2788: IG2 Signal Malfunction: Procedure
WARNING: This page is about a different variant/trim than selected.
- INSPECT IGNITION RELAY NO. 2 (IG2)
- Remove the IG2 relay from the engine room relay block.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
Tester Connection Condition Specified Condition 3 - 5 Always 10 kΩ or higher 3 - 5 Battery voltage is applied to terminals 1 and 2 Below 1 Ω - Install the IG2 relay.
NG → REPLACE IGNITION RELAY NO. 2 (IG2)
OK: Go to next step
- CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - BODY GROUND)
- Disconnect the D11 connector from the steering lock actuator assembly.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
Tester Connection Switch Condition Specified Condition D11-1 (GND) - Body ground Always Below 1 Ω D11-2 (SGND) - Body ground Always Below 1 Ω
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go to next step
- CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - BATTERY)
- Measure the voltage according to the value(s) in the table below.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Standard voltage
Tester Connection Switch Condition Specified Condition D11-6 (IG2) - D11-1 (GND) Engine switch on (IG) 11 to 14 V D11-6 (IG2) - D11-2 (SGND) Engine switch on (IG) 11 to 14 V - Measure the resistance according to the value(s) in the table below.
Standard resistance
Tester Connection Switch Condition Specified Condition *D11-6 (IG2) - D11-7 (B) Engine switch off 10 kΩ or higher *: This measurement is performed with the engine switch off to check for a short between IG2 and battery voltage.
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - BATTERY)
OK → See step 4
- Measure the voltage according to the value(s) in the table below.
- REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU). Refer to REMOVAL