DTC P0A2A: Drive Motor "A" Temperature Sensor Circuit: Wiring Diagram

WARNING: This page is about a different car, the 2015 Subaru XV Crosstrek. However, it is still accessible from the selected car via links, so may be relevant.

CVT control system < Ref. to WIRING DIAGRAM , CVT Control System.>

Fig 1: Drive Motor A Temperature Sensor Circuit - Wiring Diagram

Courtesy of SUBARU OF AMERICA, INC.

DTC PROCEDURE

Step	Check	Yes	No
1 CHECK CURRENT DATA. Warm up the engine. Using the Subaru Select Monitor, confirm the current data of drive motor control system, the values of «A/T Oil Temperature»«Drive Motor Temperature A Sensor Voltage». < Ref. to DRIVE MOTOR CONTROL SYSTEM , OPERATION, Read Current Data.>	Is the value of «Drive Motor Temperature A Sensor Voltage » 4.5 V or more when «A/T Oil Temperature» is 40°C (104°F) or more?	Go to step 2 .	Even if DTC is detected, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again. NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.
2 CHECK HARNESS AND DRIVE MOTOR. Turn the ignition switch to OFF. Disconnect the DMCM connector (R442). Using a tester, measure the resistance between terminals in the DMCM connector. Connector & terminal (R442) No. 4 - (R442) No. 5: (R442) No. 3 - (R442) No. 5:	Does the resistance between either two points show 218 kΩ or more?	Go to step 3 .	Replace DMCM. < Ref. to appropriate DRIVE MOTOR CONTROL MODULE in Continuously Variable Transmission TH58A article.>
3 CHECK DRIVE MOTOR. Disconnect the drive motor assembly connector (R603). Using a tester, measure the resistance between terminals in the drive motor assembly connector. Connector & terminal (T32) No. 18 - (T32) No. 17: (T32) No. 19 - (T32) No. 17:	Does the resistance between either two points show 218 kΩ or more?	Replace the drive motor assembly. < Ref. to appropriate DRIVE MOTOR ASSEMBLY in Continuously Variable Transmission TH58A article.>	Repair the open circuit of harness between DMCM connector and drive motor assembly connector, or repair the intermediate connector.

NOTE: Characteristic curve of temperature sensor

Fig 2: Temperature Sensor Resistance Characteristic Curve

Courtesy of SUBARU OF AMERICA, INC.

Temp. (°C)	Temp. (°F)	Standard at Max. (kΩ)	Standard at Min. (kΩ)
-50	-58	9, 847	7, 755
-45	-49	6, 735	5, 383
-40	-40	4, 682	3, 796
-35	-31	3, 282	2, 698
-30	-22	2, 334	1, 945
-25	-13	1, 676	1, 414
-20	-4	1, 219	1, 041
-15	5	893.2	772.8
-10	14	662.4	579.8
-5	23	494.8	438.2
0	32	373.7	334.5
5	41	284.1	257
10	50	218.1	199.4
15	59	168.5	155.6
20	68	131.3	122.4
25	77	103	97
30	86	82.12	76.62
35	95	65.86	60.9
40	104	53.2	48.76
45	113	43.17	39.23
50	122	35.26	31.78
55	131	28.94	25.87
60	140	23.89	21.19
65	149	19.81	17.43
70	158	16.51	14.43
75	167	13.82	11.99
80	176	11.63	10.01
85	185	9.822	8.403
90	194	8.333	7.082
95	203	7.093	5.988
100	212	6.063	5.086
105	221	5.203	4.337
110	230	4.482	3.714
115	239	3.874	3.191
120	248	3.361	2.752
125	257	2.924	2.381
130	266	2.553	2.067
135	275	2.235	1.8
140	284	1.963	1.572
145	293	1.729	1.377
150	302	1.527	1.21
155	311	1.352	1.066
160	320	1.2	0.9427
165	329	1.068	0.835
170	338	0.9535	0.7417
175	347	0.8526	0.6602
180	356	0.7643	0.5892
185	365	0.6866	0.527
190	374	0.6183	0.4725
195	383	0.5578	0.4245
200	392	0.5043	0.3822
205	401	0.4568	0.3448
210	410	0.4147	0.3117
215	419	0.3771	0.2824
220	428	0.3435	0.2563
225	437	0.3135	0.233
230	446	0.2866	0.2122
235	455	0.2624	0.1936
240	464	0.2407	0.177
245	473	0.2212	0.162
250	482	0.2035	0.1486
255	491	0.1876	0.1365
260	500	0.1731	0.1256
265	509	0.16	0.1157
270	518	0.1481	0.1067
275	527	0.1373	0.09867
280	536	0.1274	0.0913
285	545	0.1184	0.0846
290	554	0.1102	0.07849
295	563	0.1027	0.07292
300	572	0.09578	0.06784