B2788

STEERING COLUMN: STEERING LOCK SYSTEM: B2788: IG2 Signal Malfunction
B2788 - IG2 Signal Malfunction

DESCRIPTION

The steering lock ECU receives power from the IG2 relay. When the digital signal from the certification ECU and the voltage from the IG2 relay are received by the steering lock ECU, the steering will be unlocked. The steering lock ECU will not lock the steering when power from the IG2 relay is present (this prevents the steering from being locked while the vehicle is moving).





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT IGNITION RELAY NO. 2

(a) Remove the IG2 relay from the engine room R/B.





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

Standard resistance:





NG -- REPLACE IGNITION RELAY NO. 2
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - BODY GROUND)

(a) Disconnect the E51 connector from the steering lock actuator assembly.





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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - BATTERY)

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





Standard voltage:





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

Standard resistance:





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

OK -- REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)

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