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DTC P2530: Ignition Switch Run Position Circuit

 
 
 
 
IGNITION SWITCH-IG CIRCUIT
  • Refer to Inspection Procedure 23 - Power Supply System and Ignition Switch-IG System .
 
 
CIRCUIT OPERATION
  • When the ignition switch is turned on, the ignition switch ON signal is input into the ECM (terminal No. 92) and also into the ETACS-ECU.
 
 
TECHNICAL DESCRIPTION
  • The ECM compares the ignition switch ON signal sent from the ignition switch with ignition switch information sent from ETACS-ECU. The ECM checks for the abnormality.
 
 
DTC SET CONDITIONS
Check Condition
  • Ignition switch: "ON" → "LOCK" (OFF)
Judgment Criterion
  • While the ignition switch ON signal is input into the ECM, the ignition switch information, sent from the ETACS-ECU via CAN, is turned to OFF from ON. This allows the CAN to be stopped.
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • None
 
 
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
  • Shorted ignition switch-IG circuit or connector damage.
  • CAN system failed.
  • ETACS-ECU failed.
  • ECM failed.
 
 
DIAGNOSIS
Required Special Tool:
  • MB991958: Scan Tool (M.U.T.-III Sub Assembly)
    • MB991824: V.C.I.
    • MB991827: USB Cable
    • MB991910: Main Harness A
STEP 1. Using scan tool MB991958, diagnose CAN bus line.
cautionTo prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is the CAN bus line normal?
Go to Step 2.
Repair the CAN bus line. Refer to GROUP 54C, Diagnosis - CAN Bus Diagnostics Table . Then go to Step 7.
 
STEP 2. Using scan tool MB991958, read the diagnostic trouble code (DTC).
(1) Turn the ignition switch to the "ON" position.
(2) Read the ETACS-DTC.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Is the ETACS-DTC set?
Refer to GROUP 54A, ETACS - Diagnostic Trouble Code Chart .
Go to Step 3.
 
STEP 3. Check harness connector B-27 at ECM for damage.
Is the harness connector in good condition?
Go to Step 4.
Repair or replace it. Refer to GROUP 00E, Harness Connector Inspection . Then to go to Step 7.
 
STEP 4. Check for short circuit to power supply between ETACS-ECU connector C-403 (terminal No. 10) and ECM connector B-27 (terminal No. 92).
Is the harness wire in good condition?
Go to Step 5.
Repair it. Then to go to Step 7.
 
STEP 5. Using scan tool MB991958, read the diagnostic trouble code (DTC).
(1) Turn the ignition switch ON and "LOCK" (OFF), and then leave it in the "LOCK" (OFF) position for more than 10 seconds. Place the ignition switch in the ON position again.
(2) After the MFI-DTC has been deleted, read the MFI-DTC again.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Is DTC P2530 set?
Go to Step 6.
It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions .
 
STEP 6. Replace the ETACS-ECU.
(1) Replace the ETACS-ECU.
(2) Turn the ignition switch ON and "LOCK" (OFF), and then leave it in the "LOCK" (OFF) position for more than 10 seconds. Place the ignition switch in the ON position again.
(3) After the DTC has been deleted, read the DTC again.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is DTC P2530 set?
Replace the ECM (Refer to, Removal and Installation ). Then go to Step 7.
The inspection is complete.
 
STEP 7. Using scan tool MB991958, read the diagnostic trouble code (DTC).
(1) Turn the ignition switch ON and "LOCK" (OFF), and then leave it in the "LOCK" (OFF) position for more than 10 seconds. Place the ignition switch in the ON position again.
(2) After the DTC has been deleted, read the DTC again.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Is DTC P2530 set?
Retry the troubleshooting.
The inspection is complete.