# hicas light is on... **URL:** \ **Category:** SON240sx Automotive\ **Created:** [September 11, 2003, 11:15pm UTC](https://forums.speedlife.net/t/hicas-light-is-on/80061 "2003-09-11T23:15:32Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![koz](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/koz/32/5478_2.png) [@koz](https://forums.speedlife.net/u/koz)\ **Post date:** [September 11, 2003, 11:15pm UTC](https://forums.speedlife.net/t/hicas-light-is-on/80061/1 "2003-09-11T23:15:32Z")
lately, my hicas light comes on about 10 minutes after startup and stays on until the car is turned off. i don’t feel any difference in the steering or handling, and all fluids are topped up (no leaks). :? how do i go about testing the hicas to determine if there is anything wrong with it? ---
**Author:** ![system](https://canada1.discourse-cdn.com/flex034/uploads/speedlife/original/2X/b/b7170c8eddc0b95ece6b88172b2f416a08489a45.png) [@system](https://forums.speedlife.net/u/system)\ **Post date:** [September 12, 2003, 5:27am UTC](https://forums.speedlife.net/t/hicas-light-is-on/80061/2 "2003-09-12T05:27:32Z")
HICAS Diagnostic Procedure 1. Input starting conditions for self-diagnosis. - Turn ignition switch “OFF”. - Set shift lever to “P” or “N” (A/T) or “Neutral” (M/T). - Turn ignition switch “ON”. - Immediately start engine. - Turn steering wheel from left to right (at least 20deg from the neutral position) 5- times or more, then depress foot brake pedal at least 5- times all within 10- seconds after ignition switch has been turned “ON”. 1. Input self-diagnosis item. - Depress and release foot brake pedal. - Turn steering wheel from left to right (at least 20deg) from the neutral position. - (M/T model): Depress clutch pedal and move gear shift lever to any position other than Neutral and return to Neutral. Release clutch pedal. (A/T model): Disengage and engage parking brake lever. Move shift lever to any position other than Neutral or Parking and return to Parking. - Move car at least 3 meters (10ft) forward and proceed at indicated speed of at least 2km/h (1mph) in self-diagnosis mode. 1. The self-diagnosis mode will then appear in the “HICAS” warning lamp. - When all systems are normal HICAS warning lamp flashes at 0.25 second intervals. - When there is a system malfunction (there is a nifty diagram here of HICAS lamp pulses. I tried to translate them to words…) Mode A) 10 short pulses for 5 seconds. No pulses for 5 seconds. Nine 2-second interval indicating the system status (18 seconds total). (short pulse = good, 1 second pulse=bad) 1. HICAS Solenoid R.H. 2. HICAS Solenoid L.H. 3. Fail-Safe Valve 4. (Constantly normal mode) 5. Vehicle Speed Sensor 6. Steering Angle Sensor 7. Steering Neutral Position Sensor 8. A/T: Parking brake sensor M/T: Clutch Sensor 9. A/T: Inhibitor Sensor M/T: Neutral Sensor \*\* Display repeats until ignition switch is turned “OFF” or 5 min has past. Mode B) Lamp on for 5 seconds. No pulses for 5 seconds. Nine 2-second interval indicating the system status (18 seconds total). (short (0.1 sec) pulse = good, 1 second pulse=bad) 1. HICAS Solenoid R.H. 2. HICAS Solenoid L.H. 3. Fail-Safe Valve 4. (Constantly normal mode) 5. Vehicle Speed Sensor 6. Steering Angle Sensor 7. Steering Neutral Position Sensor 8. A/T: Parking brake sensor M/T: Clutch Sensor 9. A/T: Inhibitor Sensor M/T: Neutral Sensor \*\* Display repeats until ignition switch is turned “OFF” or 5 min has past. Note 1: To change the display mode to “A”, turn OFF ignition switch after mode “B” is displayed. When battery is insufficient, mode “B” is displayed. Note 2: If fail-safe system was operated (fail-safe valve is operating) when ignition switch was turned OFF for the last time, mode A will be displayed. If fail-safe system was not operated when the ignition switch was turned OFF for the last time, mode B will be displayed. - Canceling the self-diagnosis function Three methods. 1. By turning the ignition switch off. 2. After self-diagnosis has been operated for ~5 minutes. 3. If the vehicle speed goes over 30 km/h (19 mph).