RSX L4-2.0L (2005)
74. Check for continuity between ECM/PCM connector terminal A21 and body ground.
Is there continuity?
YES - Repair short in the wire between the ECM/PCM (A21) and the MAP sensor, IMT (IMRC) valve or the output shaft (countershaft) speed
sensor.
NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM, then recheck. If the
symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM.
75. Measure voltage between body ground and ECM/PCM connector terminal A20.
Is there about 5 V?
YES - Go to step 83.
NO - Go to step 76.
76. Turn the ignition switch OFF.
77. Disconnect the connector from each of these sensors, one at a time, and measure voltage between body ground and ECM/PCM connector terminal
A20 with the ignition switch ON (II).
-
Throttle position (TP) sensor
-
Input shaft (mainshaft) speed sensor
Is there about 5 V?
YES - Replace the sensor that restored 5 V when disconnected.
NO - Go to step 78.
78. Turn the ignition switch OFF
79. Jump the SCS line with the HDS
80. Disconnect the connector from these sensors
-
Throttle position (TP) sensor
-
Input shaft (mainshaft) speed sensor
81. Disconnect ECM/PCM connector A (31P).
