TSX L4-2.4L (2005)
64. Turn the ignition switch OFF.
65. Disconnect the connector from each of these sensors, one at a time, and measure voltage between body ground and ECM/PCM connector terminal
A21 with the ignition switch ON (II).
-
Manifold absolute pressure (MAP) sensor
-
Accelerator pedal position (APP) sensor
-
Input shaft (mainshaft) speed sensor (A/T)
Is there about 5 V?
YES - Replace the sensor that restored 5 V when disconnected.
NO - Go to step 66.
66. Turn the ignition switch OFF.
67. Jump the SCS line with the HDS.
68. Disconnect the connectors from these sensors:
-
Manifold absolute pressure (MAP) sensor
-
Accelerator pedal position (APP) sensor
-
Input shaft (mainshaft) speed sensor (A/T)
69. Disconnect ECM/PCM connector A (31P).
70. 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, the APP sensor or the input shaft (mainshaft) speed sensor
(A/T)
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 does away with a known-good ECM/PCM, replace the original ECM/PCM.
