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PCS-30 < ECU DIAGNOSIS > [IPDM E/R] IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM) If No CAN Communication Is Available With BCM IGNITION RELAY MALFUNCTION DETECTION FUNCTION • IPDM E/R monitors the voltage at the contact circuit and excitation coil circuit of the ignition relay inside it. coil circuit. • If the ignition relay cannot turn OFF due to contact seizure, it activates the tail lamp relay for 10 minutes to alert the user to the ignition relay malfunction when the ignition switch is turned OFF. NOTE: The tail lamp turns OFF when the ignition switch is turned ON. FRONT WIPER CONTROL IPDM E/R detects front wiper stop position by a front wiper auto stop signal. NOTE: Control part Fail-safe operation Cooling fan • Outputs the pulse duty signal (PWM signal) 100% when the ignition switch is turned ON • Outputs the pulse duty signal (PWM signal) 0% when the ignition switch is turned OFF A/C compressor A/C relay OFF Alternator Outputs the power generation command signal (PWM signal) 0% Control part Fail-safe operation Headlamp • Turns ON the headlamp low relay when the ignition switch is turned ON • Parking lamps • Turns ON the tail lamp relay when the ignition switch is turned ON Front wiper • The status just before activation of fail-safe control is maintained until the ignition switch is turned OFF while the front wiper is operating at LO or HI speed. • The wiper is operated at LO speed until the ignition switch is turned OFF if the fail- safe control is activated while the front wiper is set in the INT mode and the front wiper Front fog lamps Front fog lamp relay OFF Horn Horn OFF Ignition relay The status just before activation of fail-safe is maintained. Starter motor Starter control relay OFF Steering lock unit Steering lock relay OFF DTC Ignition switch Ignition relay Tail lamp relay — ON ON — — OFF OFF — B2098: IGN RELAY ON OFF ON ON (10 minutes) B2099: IGN RELAY OFF ON OFF — Ignition switch Front wiper switch Auto stop signal ON OFF Front wiper stop position signal cannot be ON The signal does not change for 10 seconds. |