P2122, P2123, P2127, P2128, P2138; Troubleshooting - Yamaha XSR 900 2022 Service Manual

EAS20632

P2122, P2123, P2127, P2128, P2138

EAS33112

TROUBLESHOOTING

Item
• [P2122] Accelerator position sensor: open or short to ground circuit is detected. Normal signal is not
received from the accelerator position sensor.
• [P2123] Accelerator position sensor: short to power circuit is detected. Normal signal is not received
from the accelerator position sensor.
• [P2127] Accelerator position sensor: open or short to ground circuit is detected. Normal signal is not
received from the accelerator position sensor.
• [P2128] Accelerator position sensor: short to power circuit is detected. Normal signal is not received
from the accelerator position sensor.
• [P2138] Deviation error. Normal signal is not received from the accelerator position sensor.
Fail-safe system
• Able to start engine (depending on the situation)
• Able to drive vehicle (depending on the situation)
Procedure
TIP
If a DTC other than P2138 (P2122, P2123, P2127, or P2128) is indicated, perform troubleshooting first.
1. Connection of accelerator position sensor coupler.
• Check the locking condition of the coupler.
• Disconnect the coupler and check the pins (bent or broken terminals and locking condition of the
pins).
Is the coupler condition normal?
YES
→ Go to step 2.
NO
a. Connect the coupler securely or replace the wire harness.
b. Turn the main switch to "ON", and then check the DTC using the malfunction mode of the YDT.
Is it in the "Recovered" condition?
YES
→ Go to step 6, and complete the service.
NO
→ Go to step 2.
2. Connection of ECU coupler.
• Check the locking condition of the coupler.
• Disconnect the coupler and check the pins (bent or broken terminals and locking condition of the
pins).
Is the coupler condition normal?
YES
→ Go to step 3.
NO
a. Connect the coupler securely or replace the wire harness.
b. Turn the main switch to "ON", and then check the DTC using the malfunction mode of the YDT.
P2122, P2123, P2127, P2128, P2138
9-248