Page text (OCR transcript)
Code
No. System Diagnosis Trouble Area See page
22 Water Temp.
Sensor Signal Open or short circuit in coolant temp.
sensor signal. 1. Water temp. sensor
circuit
2. Water temp. sensor
3. ECU FI-72
23 Intake Air Temp.
Sensor Signal Open or short circuit in intake air temp.
sensor. 1. Intake air temp. sensor
circuit
2. Intake air temp. sensor
3. ECU FI-38
31 Air Flow Meter
Signal Open circuit in Vc signal or Vs and E2
short circuited when idle points are
closed. 1. Air flow meter circuit
2. Air flow meter
3. ECU FI-37
32 Air Flow Meter
Signal Open circuit in E2 or Vc and Vs short
circuited. Same as 31, above. FI-37
41 Throttle Position
Sensor Signal Open or short circuit in
throttle position sensor signal. 1. Throttle position
sensor circuit
2. Throttle position
sensor
3. ECU FI-35
42 Vehicle Speed
Sensor Signal (A/T): Signal informing ECU that vehicle
speed is 2.0 km/h or less has been
input ECU for 5 seconds with
engine running at 2,500 rpm or
more and shift lever is in other than
N or P range.
(M/T): Signal informing ECU that vehicle
speed is 2.0 km/h or less has been
input ECU for 5 seconds with
engine running at 2,500 rpm or
more. 1. Vehicle speed sensor
circuit
2. Vehicle speed sensor
3. Torque converter
slipping
4. ECU
43 Starter Signal
(+ B) No STA signal to ECU when engine is
running over 800 rpm. 1. Main relay circuit
2. IG switch circuit
(starter)
3. IG switch
4. ECU FI-40
51 Switch Signal Neutral start switch OFF or air condi-
tioner switch ON during diagnostic
check. 1. Neutral start S/W
2. Air con. S/W
3. ECU
52 Knock Sensor
Signal Open or short circuit in knock sensor. 1. Knock sensor circuit
2. Knock sensor
3. ECU
53 Knock Sensor
Signal Faulty ECU (KNOCK CPU) ECU
