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Diagnostic procedure

WARNING: This page is about a different car, the 2005 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
DTC P2101 [L3] DIAGNOSTIC PROCEDURE

STEP INSPECTION ACTION
1 VERIFY FREEZE FRAME DATA HAS BEEN RECORDED 
  • Has FREEZE FRAME DATA been recorded?
 Yes Go to the next step.
No Record FREEZE FRAME DATA on repair order, then go to the next step.
2 VERIFY RELATED REPAIR INFORMATION AVAILABILITY 
  • Check for related Service Bulletins and/or online repair information availability.
  • Is any related repair information available?
 Yes Perform repair or diagnosis according to the available repair information.
  • If the vehicle is not repaired, go to the next step.
No Go to the next step.
3 VERIFY RELATED PENDING AND STORED DTCS 
  • Turn ignition switch to OFF, then ON (Engine off).
  • Verify pending and stored DTCs using the WDS or equivalent.
  • Is any DTC present?
 Yes Go to appropriate DTC troubleshooting procedure.
No Go to the next step.
4 IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA 
  • Is DTC P2101 on FREEZE FRAME DATA?
 Yes Go to the next step.
No Go to troubleshooting procedures for DTC on FREEZE FRAME DATA.
5 INSPECT PCM CONNECTOR FOR POOR CONNECTION 
  • Turn the ignition switch off.
  • Disconnect PCM connector.
  • Inspect for poor connection (such as damaged, pulled out terminals, corrosion).
  • Is there any malfunction?
 Yes Repair or replace the terminal, then go to Step 22.
No Go to the next step.
6 INSPECT MAIN RELAY OUTPUT VOLTAGE 
  • Turn the ignition switch off.
  • Connect PCM connector.
  • Turn ignition switch to ON (Engine off).
  • Measure voltage between PCM terminal 60(1), 2Y(2) and body ground.
  • Is voltage B+  ?
 Yes Go to Step 13.
No Go to the next step.
7 INSPECT MAIN RELAY CONNECTOR FOR POOR CONNECTION 
  • Turn the ignition switch off.
  • Disconnect main relay.
  • Inspect for poor connection (such as damaged, pulled out terminals, corrosion).
  • Is there any malfunction?
 Yes Repair or replace the terminal, then go to Step 22.
No Go to the next step.
8 INSPECT POWER SUPPLY OF MAIN RELAY 
  • Turn ignition switch to ON (Engine off).
  • Measure voltage between main relay terminal D (harness-side) and body ground.
  • Is voltage B+  ?
 Yes Go to the next step.
No Repair or replace harness for open circuit, then go to Step 22.
9 INSPECT POWER SUPPLY FOR CONTROL CIRCUIT OF MAIN RELAY 
  • Turn ignition switch to ON (Engine off).
  • Measure voltage between main relay terminal A (harness-side) and body ground.
  • Is voltage B+  ?
 Yes Go to the next step.
No Repair or replace harness for open circuit, then go to Step 22.
10 INSPECT MAIN RELAY 
 Yes Go to the next step.
No Replace main relay, then go to Step 22.
11 INSPECT POWER CIRCUIT FOR OPEN CIRCUIT 
  • Turn the ignition switch off.
  • Disconnect main relay and PCM connector.
  • Check continuity between main relay terminal C (harness-side) and PCM terminal 60(1), 2Y(2) (harness-side).
  • Is there continuity?
 Yes Go to the next step.
No Repair or replace harness for open circuit, then go to Step 22.
12 INSPECT CONTROL CIRCUIT FOR OPEN CIRCUIT 
  • Check continuity between main relay terminal E (harness-side) and PCM terminal 46(1), 2X(2) (harness-side).
  • Is there continuity?
 Yes Go to the next step.
No Repair or replace harness for open circuit, then go to Step 22.
13 INSPECT ET CONTROL RELAY OUTPUT VOLTAGE 
  • Turn ignition switch to ON (Engine off).
  • Measure voltage between PCM terminal 89(1), 4V(2) (harness-side) and body ground.
  • Is voltage B+  ?
 Yes Go to the next step.
No Repair or replace harness for short to power supply, then go to Step 22.
14 INSPECT POOR CONNECTION OF ET CONTROL RELAY CONNECTOR 
  • Turn the ignition switch off.
  • Disconnect ET control relay.
  • Check ET control relay connector (harness-side) for poor connection (such as damaged, pulled out terminals, corrosion).
  • Is there any malfunction?
 Yes Repair or replace the terminal, then go to Step 22.
No Go to the next step.
15 INSPECT POWER SUPPLY OF ET CONTROL RELAY 
  • Turn ignition switch to ON (Engine off).
  • Measure voltage between ET control relay terminal D (harness-side) and body ground.
 Yes Go to the next step.
No Repair or replace harness for open circuit, then go to Step 22.
16 INSPECT POWER SUPPLY FOR CONTROL CIRCUIT OF ET CONTROL RELAY 
  • Turn ignition switch to ON (Engine off).
  • Measure voltage between ET control relay terminal A (harness-side) and body ground.
  • Is voltage B+  ?
 Yes Go to the next step.
No Repair or replace harness for open circuit between ET control relay terminal A and main relay terminal C, then go to Step 22.
17 INSPECT ET CONTROL RELAY 
 Yes Go to the next step.
No Replace ET control relay, then go to Step 22.
18 INSPECT POWER CIRCUIT FOR OPEN CIRCUIT 
  • Turn the ignition switch off.
  • Check continuity between ET control relay terminal C (harness-side) and PCM terminal 89(1), 4V(2) (harness-side).
  • Is there continuity?
 Yes Go to the next step.
No Repair or replace harness for open circuit, then go to Step 22.
19 INSPECT CONTROL CIRCUIT FOR OPEN CIRCUIT 
  • Check continuity between ET control relay E (harness-side) and PCM terminal 65(1), 3S(2) (harness-side).
 Yes Go to the next step.
No Repair or replace harness for open circuit, then go to Step 22.
20 INSPECT THROTTLE POSITION SENSOR NO. 1 OUTPUT VOLTAGE 
  • Turn the ignition switch off.
  • Connect PCM connector.
  • Turn ignition switch to ON (Engine off).
  • Check voltage between PCM terminal 40(1), 3M(2) and body ground.
  • Is voltage 0.40-0.60 V? 
 Yes Go to the next step.
No Check throttle position sensor No. 1 and related circuits and terminal.
(See THROTTLE POSITION (TP) SENSOR INSPECTION .)
Repair or replace if necessary, then go to Step 22.
21 INSPECT THROTTLE POSITION SENSOR NO. 2 OUTPUT VOLTAGE 
  • Turn ignition switch to ON (Engine off).
  • Check voltage between PCM terminal 39(1), 3J(2) and body ground.
  • Is voltage 4.40-4.60 V? 
 Yes Go to the next step.
No Check throttle position sensor No. 2 and related circuits and terminal.
(See THROTTLE POSITION (TP) SENSOR INSPECTION .)
Repair or replace as necessary, then go to the next step.
22 VERIFY TROUBLESHOOTING OF DTC P2101 COMPLETED 
  • Make sure to reconnect all disconnected connectors.
  • Turn ignition switch to ON (Engine off).
  • Clear the DTC from the PCM memory using the WDS or equivalent.
  • Start engine and run it at idle.
  • Turn ignition switch to OFF then ON (Engine off).
  • Is same DTC present?
 Yes Replace PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION .)
No Go to the next step.
23 VERIFY AFTER REPAIR PROCEDURE 
 Yes Go to the applicable DTC inspection.
(See DTC TABLE .)
No Troubleshooting completed.
(1) California emission regulation applicable ATX model
(2) Except for California emission regulation applicable ATX model
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