DESCRIPTION This DTC is detected when an open circuit or short to ground in the A.D.D. shift motor drive circuit is detected. |
DTC Code | DTC Detection Condition
- Diagnosis Condition
- Malfunction Status
- Malfunction Time
- Other
| Trouble Area | |
P17A0 |
- Ignition switch ON (when not switching between 2WD and 4H)
- Open circuit in the A.D.D. shift motor drive circuit
- 1 second or more
- 1 trip detection logic
|
- Wire harness and connector
- 4 wheel drive control ECU
- A.D.D. actuator (differential vacuum actuator assembly)
| | P17A1 |
- Ignition switch ON (when not switching between 2WD and 4H)
- Short to ground in the A.D.D. shift motor drive circuit
- 1 second or more
- 1 trip detection logic
|
- Wire harness and connector
- 4 wheel drive control ECU
- A.D.D. actuator (differential vacuum actuator assembly)
| WIRING DIAGRAM
 PROCEDURE
| 1. |
CHECK DIFFERENTIAL VACUUM ACTUATOR ASSEMBLY (A.D.D. SHIFT MOTOR) |
 (a) Disconnect the 4 wheel drive control ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
A25-1 (DM1) - A25-2 (DM2) |
Always | 2 Ω or less | |
A25-1 (DM1) or A25-2 (DM2) - Body ground |
Always | 10 kΩ or higher | Text in Illustration |
*a | Front view of wire harness connector
(to 4 Wheel Drive Control ECU) |
| OK |
 | REPLACE 4 WHEEL DRIVE CONTROL ECU |
|
NG |
 | |
| 2. |
CHECK HARNESS AND CONNECTOR (4 WHEEL DRIVE CONTROL ECU - DIFFERENTIAL VACUUM ACTUATOR ASSEMBLY) |
(a) Disconnect the A25 4 wheel drive control ECU connector. (b) Disconnect the G1 A.D.D. actuator (differential vacuum actuator assembly) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
A25-1 (DM1) - G1-1 (DM1) |
Always | Below 1 Ω | |
A25-2 (DM2) - G1-2 (DM2) |
Always | Below 1 Ω | |
A25-1 (DM1) or G1-1 (DM1) - Body ground |
Always | 10 kΩ or higher | |
A25-2 (DM2) or G1-2 (DM2) - Body ground |
Always | 10 kΩ or higher |
| OK |
| REPLACE DIFFERENTIAL VACUUM ACTUATOR ASSEMBLY |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR | | 
