Components COMPONENTS ILLUSTRATION ![]() Inspection INSPECTION PROCEDURE 1. INSPECT SECURITY HORN ASSEMBLY ![]() (a) Apply battery voltage and check operation of the horn. OK:
If the result is not as specified, replace the security horn assembly. Installation INSTALLATION CAUTION / NOTICE / HINT HINT: A bolt without a torque specification is shown in the standard bolt chart (See
page PROCEDURE 1. INSTALL SECURITY HORN ASSEMBLY (a) Install the security horn assembly with the bolt. (b) Connect the connector. Removal REMOVAL PROCEDURE 1. REMOVE SECURITY HORN ASSEMBLY
(b) Remove the bolt and security horn assembly. |
Toyota Tundra Service Manual > Sfi System: Actuator Supply Voltage Circuit / Open (P0657)
DESCRIPTION The ECM monitors the output voltage to the throttle actuator. This self-check ensures that the ECM is functioning properly. The output voltage usually is 0 V when the ignition switch is turned off. If the output voltage is higher than 7 V when the ignition switch is turned off, the ECM w ...