DTC 3-7: TCS Control Valve Angle Sensor Signal
- Check for any PGM-FI DTC(s). With SCS Service Connector (07PAZ-0010100) connected to 2-pin service check connector, turn ignition switch to ON position (without starting engine). See Figure
. Record blinking MIL sequence. See Figure
. If any PGM-FI DTC(s) exist, diagnose those first. If no PGM-FI DTC(s) exist, go to next step.
- Disconnect TCS control valve angle sensor 3-pin connector. See Fig 1
. Turn ignition on. Measure voltage between ground and TCS control valve angle sensor 3-pin connector terminal No. 3 (Yellow/Blue wire). See Fig 2
. Reading should be approximately 5 volts. If reading is as specified, go to next step. If reading is not as specified, repair open in Yellow/Blue wire between TCS control valve angle sensor 3-pin connector terminal No. 3 and PCM 22-pin connector "D" terminal No. 21. See WIRING DIAGRAMS
.
- Measure voltage between TCS control valve angle sensor 3-pin connector terminals No. 3 (Yellow/Blue wire) and No. 1 (Green/White wire). See Fig 2
. Reading should be approximately 5 volts. If reading is as specified, go to next step. If reading is not as specified, repair open in wire between TCS control valve angle sensor 3-pin connector terminal No. 1 and PCM 22-pin connector "D" terminal No. 22. See WIRING DIAGRAMS
.
- Turn ignition off. Disconnect TCS control unit 14-pin connector. Turn ignition on. Check for continuity between ground and TCS control valve angle sensor 3-pin connector terminal No. 2 (Blue/Green wire). See Fig 2
. If continuity does not exist, go to next step. If continuity exists, repair short to ground in Blue/Green wire between TCS control unit 14-pin connector terminal No. 6 and TCS control valve angle sensor 3-pin connector terminal No. 2. See WIRING DIAGRAMS
.
- Remove air intake duct. See Fig 1
. With ignition on, apply battery voltage to terminal No. 1 and ground to terminal No. 2 of TCS control valve actuator 2-pin connector. See Figure
. Measure voltage between ground and TCS control unit 14-pin connector terminal No. 6 (Blue/Green wire). See Figure
. There should be a smooth transition in voltage from approximately 4.5 volts to .5 volt as the TCS control valve is closed. If voltage is not as specified, go to next step. If voltage is as specified, system has returned to normal. If problem returns, replace TCS control unit.
- Check for an open in Blue/Green wire between TCS control unit 14-pin connector terminal No. 6 and TCS control valve angle sensor 3-pin connector terminal No. 2. If wiring is okay, replace TCS control valve assembly. See TCS CONTROL VALVE ASSEMBLY
under REMOVAL & INSTALLATION. Retest system.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Courtesy of AMERICAN HONDA MOTOR CO., INC.