FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
Courtesy of Operation CHARM: Car repair manuals for everyone.
Home >> Mitsubishi >> 2011 >> Eclipse Spyder L4-2.4L (4G69) >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> B Code Charts >> B1536

B1536




DTC B1530: Seat belt switch (RH) malfunction
DTC B1531: Seat belt switch (RH) circuit open (for Normal/Close terminal)
DTC B1532: Seat belt switch (RH) circuit (ground side) shorted (for Normal/Close terminal)
DTC B1533: Seat belt switch (RH) circuit (power supply side) shorted (for Normal/Close terminal)
DTC B1534: Seat belt switch (RH) circuit open (for Normal/Open terminal)
DTC B1535: Seat belt switch (RH) circuit (ground side) shorted (for Normal/Open terminal)
DTC B1536: Seat belt switch (RH) circuit (power supply side) shorted (for Normal/Open terminal)
DTC B1537: Seat belt switch (RH) circuit open (for common terminal)
DTC B1538: Seat belt switch (RH) circuit (ground side) shorted (for common terminal)
DTC B1539: Seat belt switch (RH) circuit (power supply side) shorted (for common terminal)













CAUTION:
If DTC B1530, B1531, B1532, B1533, B1534, B1535, B1536, B1537, B1538 or B1539 are set in the combination meter, always diagnose the CAN bus lines.

CIRCUIT OPERATION

The SRS-ECU determines whether the seat belt is fastened or not according to the connection location of the seat belt switch in the seat buckle.

DTC SET CONDITIONS

DTC is set when the resistance between input terminals of the seat belt switch in the SRS-ECU is without the standard value.
Cause of trouble in each DTC is as follows.






TROUBLESHOOTING HINTS

- Malfunction of the seat belt switch

- Damaged wiring harnesses or connectors

- Malfunction of the SRS-ECU


DIAGNOSIS

Required Special Tools:

- MB991222: Probe
- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: V.C.I.
- MB991827: M.U.T.-III USB Cable
- MB991910: M.U.T.-III Main Harness A

STEP 1. Using scan tool MB991958, diagnose the CAN bus line.





(1)
CAUTION:
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

Connect scan tool MB991958. Refer to "How to connect the scan tool Reading and Clearing Diagnostic Trouble Codes."
(2)Connect scan tool MB991958 to the data link connector.
(3)Turn the ignition switch to the "ON" position.
(4)Diagnose the CAN bus line.
(5)Turn the ignition switch to the "LOCK" (OFF) position.

Q. Is the CAN bus line found to be normal?

YES Go to Step 3.

NO Repair the CAN bus line CAN Bus Diagnostics Chart). Then go to Step 2.

STEP 2. Recheck for diagnostic trouble code.





Check again if the DTC is set.
(1)Erase the DTC.
(2)Turn the ignition switch to "ON" position.
(3)Check if the DTC is set.
(4)Turn the ignition switch to the "LOCK" (OFF) position.

Q. Is the DTC set?

YES Go to Step 3.

NO There is an intermittent malfunction such as poor engaged connector(s) or open circuit How to Cope With Intermittent Malfunctions).

STEP 3. Check the passenger's seat belt switch.

























- Disconnect passenger's seat belt switch connector D-25.
- Check continuity between the passenger's seat belt switch connector D-25 terminals.





Q. Is passenger's seat belt switch in good condition?

YES Go to Step 4.

NO Replace inner seat belt. Front Seat Belt Removal and Installation.)

STEP 4. Check the passenger's seat belt switch circuit D-25. Measure the resistance at SRS-ECU connector C-124.









(1)Install the passenger's seat belt to the seat belt switch.





(2)Disconnect SRS-ECU connector C-124 and measure at the harness side (rear side).









(3)Measure the resistance between terminal 52 and terminal 51.
Resistance should be 820 ± 20 ohms





(4)Measure the resistance between terminal 52, 51 and body ground.
It should be open circuit.





(5)Measure the resistance between terminal 65 and terminal 51.
Resistance should be less than 2 ohms.





(6)Remove the passenger's seat belt from the seat belt switch.





(7)Disconnect SRS-ECU connector C-124 and measure at the harness side (rear side).





(8)Measure the resistance between terminal 65 and terminal 51.
Resistance should be 820 ± 20 ohms





(9)Measure the resistance between terminal 65, 51 and body ground.
It should be open circuit.





(10)Measure the resistance between terminal 52 and terminal 51.
Resistance should be less than 2 ohms.

Q. Does the resistance meet the value above?

YES Erase the diagnostic trouble code memory, and check the diagnostic trouble code. If DTC B1530, B1531, B1532, B1533, B1534, B1535, B1536, B1537, B1538 or B1539 are set, replace the SRS-ECU. (Refer to Service and Repair.) Then go to Step 6.

NO Go to Step 5.

STEP 5. Check the harness wires between SRS-ECU connector C-124 (terminal No.52, 65 and 51) and passenger's seat belt switch connector D-25 (terminal No.1, 2 and 3).









Q. Are harness wires between SRS-ECU connector C-124 (terminal No.52, 65 and 51) and passenger's seat belt switch connector D-25 (terminal No.1, 2 and 3) in good condition?

YES Go to Step 6.

NO Repair the harness wires between SRS-ECU connector C-124 and passenger's seat belt switch connector D-25. Then go to Step 6.

STEP 6. Recheck for diagnostic trouble code.





Check again if the DTC is set.
(1)Erase the DTC.
(2)Turn the ignition switch to the "ON" position.
(3)Check if the DTC is set.
(4)Turn the ignition switch to the "LOCK" (OFF) position.

Q. Is DTC B1530, B1531, B1532, B1533, B1534, B1535, B1536, B1537, B1538 or B1539 set?

YES Return to Step 1.

NO The procedure is complete.

pro multis Credits:Operation CHARM About Operation CHARM