PROCEDURE FOR DIAGNOSTIC TROUBLE CODES P1126
1. Turn ignition switch ON and wait at least 2 seconds.
2. Select "DATA MONITOR" mode with scan tool.
3. Start engine and let it idle for 5 seconds.
4. If DTC is detected, go to "DIAGNOSTIC PROCEDURE ".
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in damage to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
DIAGNOSTIC PROCEDURE
1. CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY
CIRCUIT-I
1. Turn ignition switch OFF.
2. Check voltage between ECM terminal 104 and ground with tester.
Voltage: Battery voltage
OK: GO TO 5
NG: GO TO 2.
2. CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY
CIRCUIT-II
1. Disconnect ECM harness connector.
2. Disconnect IPDM E/R harness connector E121.
3. Check continuity between ECM terminal 104 and IPDM E/R terminal 47. Continuity should exist.
4. Also check harness for short to ground and short to power.
OK: GO TO 4.
NG: GO TO 3.
3. DETECT MALFUNCTIONING PART
Check the following.
L Harness connectors E19, F33
l Harness for open or short between ECM and IPDM E/R
: Repair open circuit or short to ground or short to power in harness or connectors if problem found.
4. CHECK FUSE
1. Disconnect 15A fuse.
2. Check 15A fuse for blown.
OK: GO TO 8.
NG: Replace 15A fuse.
5. CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-I
1. Check voltage between ECM terminal 3 and ground under the following conditions with tester.
Ignition switch -
OFF = 0V
ON = Battery voltage (11 - 14V)
OK: GO TO 8.
NG: GO TO 6.
6. CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Disconnect IPDM E/R harness connector E124.
4. Check continuity between ECM terminal 3 and IPDM E/R terminal 42. Continuity should exist.
5. Also check harness for short to ground and short to power.
OK: GO TO 8.
NG: GO TO 7.
7. DETECT MALFUNCTIONING PART
Check the following.
L Harness connectors E20, F32
l Harness for open or short between ECM and IPDM E/R
: Repair open circuit or short to ground or short to power in harness or
connectors.
8. CHECK INTERMITTENT INCIDENT
OK: Replace IPDM E/R.
NG: Repair or replace harness or connectors.
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Thursday, December 27th, 2012 AT 1:22 PM